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@randomwalksp @DanMcInerney @o1oo1o1o @sethll @ninostephen @newpIDC @DaniloNC
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#!/usr/bin/env python2
from os import geteuid, devnull
import logging
# shut up scapy
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
from scapy.all import *
conf.verb=0
from sys import exit
import binascii
import struct
import argparse
import signal
import base64
from urllib import unquote
import platform
from subprocess import Popen, PIPE, check_output
from collections import OrderedDict
from BaseHTTPServer import BaseHTTPRequestHandler
from StringIO import StringIO
from urllib import unquote
#import binascii #already imported on line 10
# Debug
#from IPython import embed
##########################
# Potention ToDo:
# MySQL seed:hash
# VNC
# Oracle?
# Add file carving from dissectors.py
#########################
# Unintentional code contributors:
# Laurent Gaffie
# psychomario
logging.basicConfig(filename='credentials.txt',level=logging.INFO)
DN = open(devnull, 'w')
pkt_frag_loads = OrderedDict()
challenge_acks = OrderedDict()
mail_auths = OrderedDict()
telnet_stream = OrderedDict()
# Regexs
authenticate_re = '(www-|proxy-)?authenticate'
authorization_re = '(www-|proxy-)?authorization'
ftp_user_re = r'USER (.+)\r\n'
ftp_pw_re = r'PASS (.+)\r\n'
irc_user_re = r'NICK (.+?)((\r)?\n|\s)'
irc_pw_re = r'NS IDENTIFY (.+)'
irc_pw_re2 = 'nickserv :identify (.+)'
mail_auth_re = '(\d+ )?(auth|authenticate) (login|plain)'
mail_auth_re1 = '(\d+ )?login '
NTLMSSP2_re = 'NTLMSSP\x00\x02\x00\x00\x00.+'
NTLMSSP3_re = 'NTLMSSP\x00\x03\x00\x00\x00.+'
# Prone to false+ but prefer that to false-
http_search_re = '((search|query|&q|\?q|search\?p|searchterm|keywords|keyword|command|terms|keys|question|kwd|searchPhrase)=([^&][^&]*))'
#Console colors
W = '\033[0m' # white (normal)
T = '\033[93m' # tan
def parse_args():
"""Create the arguments"""
parser = argparse.ArgumentParser()
parser.add_argument("-i", "--interface", help="Choose an interface")
parser.add_argument("-p", "--pcap", help="Parse info from a pcap file; -p <pcapfilename>")
parser.add_argument("-f", "--filterip", help="Do not sniff packets from this IP address; -f 192.168.0.4")
parser.add_argument("-v", "--verbose", help="Display entire URLs and POST loads rather than truncating at 100 characters", action="store_true")
return parser.parse_args()
def iface_finder():
system_platform = platform.system()
if system_platform == 'Linux':
ipr = Popen(['/sbin/ip', 'route'], stdout=PIPE, stderr=DN)
for line in ipr.communicate()[0].splitlines():
if 'default' in line:
l = line.split()
iface = l[4]
return iface
elif system_platform == 'Darwin': # OSX support
return check_output("route get 0.0.0.0 2>/dev/null| sed -n '5p' | cut -f4 -d' '", shell=True).rstrip()
else:
exit('[-] Could not find an internet active interface; please specify one with -i <interface>')
def frag_remover(ack, load):
'''
Keep the FILO OrderedDict of frag loads from getting too large
3 points of limit:
Number of ip_ports < 50
Number of acks per ip:port < 25
Number of chars in load < 5000
'''
global pkt_frag_loads
# Keep the number of IP:port mappings below 50
# last=False pops the oldest item rather than the latest
while len(pkt_frag_loads) > 50:
pkt_frag_loads.popitem(last=False)
# Loop through a deep copy dict but modify the original dict
copy_pkt_frag_loads = copy.deepcopy(pkt_frag_loads)
for ip_port in copy_pkt_frag_loads:
if len(copy_pkt_frag_loads[ip_port]) > 0:
# Keep 25 ack:load's per ip:port
while len(copy_pkt_frag_loads[ip_port]) > 25:
pkt_frag_loads[ip_port].popitem(last=False)
# Recopy the new dict to prevent KeyErrors for modifying dict in loop
copy_pkt_frag_loads = copy.deepcopy(pkt_frag_loads)
for ip_port in copy_pkt_frag_loads:
# Keep the load less than 75,000 chars
for ack in copy_pkt_frag_loads[ip_port]:
# If load > 5000 chars, just keep the last 200 chars
if len(copy_pkt_frag_loads[ip_port][ack]) > 5000:
pkt_frag_loads[ip_port][ack] = pkt_frag_loads[ip_port][ack][-200:]
def frag_joiner(ack, src_ip_port, load):
'''
Keep a store of previous fragments in an OrderedDict named pkt_frag_loads
'''
for ip_port in pkt_frag_loads:
if src_ip_port == ip_port:
if ack in pkt_frag_loads[src_ip_port]:
# Make pkt_frag_loads[src_ip_port][ack] = full load
old_load = pkt_frag_loads[src_ip_port][ack]
concat_load = old_load + load
return OrderedDict([(ack, concat_load)])
return OrderedDict([(ack, load)])
def pkt_parser(pkt):
'''
Start parsing packets here
'''
global pkt_frag_loads, mail_auths
if pkt.haslayer(Raw):
load = pkt[Raw].load
# Get rid of Ethernet pkts with just a raw load cuz these are usually network controls like flow control
if pkt.haslayer(Ether) and pkt.haslayer(Raw) and not pkt.haslayer(IP) and not pkt.haslayer(IPv6):
return
# UDP
if pkt.haslayer(UDP) and pkt.haslayer(IP):
src_ip_port = str(pkt[IP].src) + ':' + str(pkt[UDP].sport)
dst_ip_port = str(pkt[IP].dst) + ':' + str(pkt[UDP].dport)
# SNMP community strings
if pkt.haslayer(SNMP):
parse_snmp(src_ip_port, dst_ip_port, pkt[SNMP])
return
# Kerberos over UDP
decoded = Decode_Ip_Packet(str(pkt)[14:])
kerb_hash = ParseMSKerbv5UDP(decoded['data'][8:])
if kerb_hash:
printer(src_ip_port, dst_ip_port, kerb_hash)
# TCP
elif pkt.haslayer(TCP) and pkt.haslayer(Raw) and pkt.haslayer(IP):
ack = str(pkt[TCP].ack)
seq = str(pkt[TCP].seq)
src_ip_port = str(pkt[IP].src) + ':' + str(pkt[TCP].sport)
dst_ip_port = str(pkt[IP].dst) + ':' + str(pkt[TCP].dport)
frag_remover(ack, load)
pkt_frag_loads[src_ip_port] = frag_joiner(ack, src_ip_port, load)
full_load = pkt_frag_loads[src_ip_port][ack]
# Limit the packets we regex to increase efficiency
# 750 is a bit arbitrary but some SMTP auth success pkts
# are 500+ characters
if 0 < len(full_load) < 750:
# FTP
ftp_creds = parse_ftp(full_load, dst_ip_port)
if len(ftp_creds) > 0:
for msg in ftp_creds:
printer(src_ip_port, dst_ip_port, msg)
return
# Mail
mail_creds_found = mail_logins(full_load, src_ip_port, dst_ip_port, ack, seq)
# IRC
irc_creds = irc_logins(full_load, pkt)
if irc_creds != None:
printer(src_ip_port, dst_ip_port, irc_creds)
return
# Telnet
telnet_logins(src_ip_port, dst_ip_port, load, ack, seq)
# HTTP and other protocols that run on TCP + a raw load
other_parser(src_ip_port, dst_ip_port, full_load, ack, seq, pkt, parse_args().verbose)
def telnet_logins(src_ip_port, dst_ip_port, load, ack, seq):
'''
Catch telnet logins and passwords
'''
global telnet_stream
msg = None
if src_ip_port in telnet_stream:
# Do a utf decode in case the client sends telnet options before their username
# No one would care to see that
try:
telnet_stream[src_ip_port] += load.decode('utf8')
except UnicodeDecodeError:
pass
# \r or \r\n or \n terminate commands in telnet if my pcaps are to be believed
if '\r' in telnet_stream[src_ip_port] or '\n' in telnet_stream[src_ip_port]:
telnet_split = telnet_stream[src_ip_port].split(' ', 1)
cred_type = telnet_split[0]
value = telnet_split[1].replace('\r\n', '').replace('\r', '').replace('\n', '')
# Create msg, the return variable
msg = 'Telnet %s: %s' % (cred_type, value)
printer(src_ip_port, dst_ip_port, msg)
del telnet_stream[src_ip_port]
# This part relies on the telnet packet ending in
# "login:", "password:", or "username:" and being <750 chars
# Haven't seen any false+ but this is pretty general
# might catch some eventually
# maybe use dissector.py telnet lib?
if len(telnet_stream) > 100:
telnet_stream.popitem(last=False)
mod_load = load.lower().strip()
if mod_load.endswith('username:') or mod_load.endswith('login:'):
telnet_stream[dst_ip_port] = 'username '
elif mod_load.endswith('password:'):
telnet_stream[dst_ip_port] = 'password '
def ParseMSKerbv5TCP(Data):
'''
Taken from Pcredz because I didn't want to spend the time doing this myself
I should probably figure this out on my own but hey, time isn't free, why reinvent the wheel?
Maybe replace this eventually with the kerberos python lib
Parses Kerberosv5 hashes from packets
'''
try:
MsgType = Data[21:22]
EncType = Data[43:44]
MessageType = Data[32:33]
except IndexError:
return
if MsgType == "\x0a" and EncType == "\x17" and MessageType =="\x02":
if Data[49:53] == "\xa2\x36\x04\x34" or Data[49:53] == "\xa2\x35\x04\x33":
HashLen = struct.unpack('<b',Data[50:51])[0]
if HashLen == 54:
Hash = Data[53:105]
SwitchHash = Hash[16:]+Hash[0:16]
NameLen = struct.unpack('<b',Data[153:154])[0]
Name = Data[154:154+NameLen]
DomainLen = struct.unpack('<b',Data[154+NameLen+3:154+NameLen+4])[0]
Domain = Data[154+NameLen+4:154+NameLen+4+DomainLen]
BuildHash = "$krb5pa$23$"+Name+"$"+Domain+"$dummy$"+SwitchHash.encode('hex')
return 'MS Kerberos: %s' % BuildHash
if Data[44:48] == "\xa2\x36\x04\x34" or Data[44:48] == "\xa2\x35\x04\x33":
HashLen = struct.unpack('<b',Data[47:48])[0]
Hash = Data[48:48+HashLen]
SwitchHash = Hash[16:]+Hash[0:16]
NameLen = struct.unpack('<b',Data[HashLen+96:HashLen+96+1])[0]
Name = Data[HashLen+97:HashLen+97+NameLen]
DomainLen = struct.unpack('<b',Data[HashLen+97+NameLen+3:HashLen+97+NameLen+4])[0]
Domain = Data[HashLen+97+NameLen+4:HashLen+97+NameLen+4+DomainLen]
BuildHash = "$krb5pa$23$"+Name+"$"+Domain+"$dummy$"+SwitchHash.encode('hex')
return 'MS Kerberos: %s' % BuildHash
else:
Hash = Data[48:100]
SwitchHash = Hash[16:]+Hash[0:16]
NameLen = struct.unpack('<b',Data[148:149])[0]
Name = Data[149:149+NameLen]
DomainLen = struct.unpack('<b',Data[149+NameLen+3:149+NameLen+4])[0]
Domain = Data[149+NameLen+4:149+NameLen+4+DomainLen]
BuildHash = "$krb5pa$23$"+Name+"$"+Domain+"$dummy$"+SwitchHash.encode('hex')
return 'MS Kerberos: %s' % BuildHash
def ParseMSKerbv5UDP(Data):
'''
Taken from Pcredz because I didn't want to spend the time doing this myself
I should probably figure this out on my own but hey, time isn't free why reinvent the wheel?
Maybe replace this eventually with the kerberos python lib
Parses Kerberosv5 hashes from packets
'''
try:
MsgType = Data[17:18]
EncType = Data[39:40]
except IndexError:
return
if MsgType == "\x0a" and EncType == "\x17":
try:
if Data[40:44] == "\xa2\x36\x04\x34" or Data[40:44] == "\xa2\x35\x04\x33":
HashLen = struct.unpack('<b',Data[41:42])[0]
if HashLen == 54:
Hash = Data[44:96]
SwitchHash = Hash[16:]+Hash[0:16]
NameLen = struct.unpack('<b',Data[144:145])[0]
Name = Data[145:145+NameLen]
DomainLen = struct.unpack('<b',Data[145+NameLen+3:145+NameLen+4])[0]
Domain = Data[145+NameLen+4:145+NameLen+4+DomainLen]
BuildHash = "$krb5pa$23$"+Name+"$"+Domain+"$dummy$"+SwitchHash.encode('hex')
return 'MS Kerberos: %s' % BuildHash
if HashLen == 53:
Hash = Data[44:95]
SwitchHash = Hash[16:]+Hash[0:16]
NameLen = struct.unpack('<b',Data[143:144])[0]
Name = Data[144:144+NameLen]
DomainLen = struct.unpack('<b',Data[144+NameLen+3:144+NameLen+4])[0]
Domain = Data[144+NameLen+4:144+NameLen+4+DomainLen]
BuildHash = "$krb5pa$23$"+Name+"$"+Domain+"$dummy$"+SwitchHash.encode('hex')
return 'MS Kerberos: %s' % BuildHash
else:
HashLen = struct.unpack('<b',Data[48:49])[0]
Hash = Data[49:49+HashLen]
SwitchHash = Hash[16:]+Hash[0:16]
NameLen = struct.unpack('<b',Data[HashLen+97:HashLen+97+1])[0]
Name = Data[HashLen+98:HashLen+98+NameLen]
DomainLen = struct.unpack('<b',Data[HashLen+98+NameLen+3:HashLen+98+NameLen+4])[0]
Domain = Data[HashLen+98+NameLen+4:HashLen+98+NameLen+4+DomainLen]
BuildHash = "$krb5pa$23$"+Name+"$"+Domain+"$dummy$"+SwitchHash.encode('hex')
return 'MS Kerberos: %s' % BuildHash
except struct.error:
return
def Decode_Ip_Packet(s):
'''
Taken from PCredz, solely to get Kerb parsing
working until I have time to analyze Kerb pkts
and figure out a simpler way
Maybe use kerberos python lib
'''
d={}
d['header_len']=ord(s[0]) & 0x0f
d['data']=s[4*d['header_len']:]
return d
def double_line_checker(full_load, count_str):
'''
Check if count_str shows up twice
'''
num = full_load.lower().count(count_str)
if num > 1:
lines = full_load.count('\r\n')
if lines > 1:
full_load = full_load.split('\r\n')[-2] # -1 is ''
return full_load
def parse_ftp(full_load, dst_ip_port):
'''
Parse out FTP creds
'''
print_strs = []
# Sometimes FTP packets double up on the authentication lines
# We just want the lastest one. Ex: "USER danmcinerney\r\nUSER danmcinerney\r\n"
full_load = double_line_checker(full_load, 'USER')
# FTP and POP potentially use idential client > server auth pkts
ftp_user = re.match(ftp_user_re, full_load)
ftp_pass = re.match(ftp_pw_re, full_load)
if ftp_user:
msg1 = 'FTP User: %s' % ftp_user.group(1).strip()
print_strs.append(msg1)
if dst_ip_port[-3:] != ':21':
msg2 = 'Nonstandard FTP port, confirm the service that is running on it'
print_strs.append(msg2)
elif ftp_pass:
msg1 = 'FTP Pass: %s' % ftp_pass.group(1).strip()
print_strs.append(msg1)
if dst_ip_port[-3:] != ':21':
msg2 = 'Nonstandard FTP port, confirm the service that is running on it'
print_strs.append(msg2)
return print_strs
def mail_decode(src_ip_port, dst_ip_port, mail_creds):
'''
Decode base64 mail creds
'''
try:
decoded = base64.b64decode(mail_creds).replace('\x00', ' ').decode('utf8')
decoded = decoded.replace('\x00', ' ')
except TypeError:
decoded = None
except UnicodeDecodeError as e:
decoded = None
if decoded != None:
msg = 'Decoded: %s' % decoded
printer(src_ip_port, dst_ip_port, msg)
def mail_logins(full_load, src_ip_port, dst_ip_port, ack, seq):
'''
Catch IMAP, POP, and SMTP logins
'''
# Handle the first packet of mail authentication
# if the creds aren't in the first packet, save it in mail_auths
# mail_auths = 192.168.0.2 : [1st ack, 2nd ack...]
global mail_auths
found = False
# Sometimes mail packets double up on the authentication lines
# We just want the lastest one. Ex: "1 auth plain\r\n2 auth plain\r\n"
full_load = double_line_checker(full_load, 'auth')
# Client to server 2nd+ pkt
if src_ip_port in mail_auths:
if seq in mail_auths[src_ip_port][-1]:
stripped = full_load.strip('\r\n')
try:
decoded = base64.b64decode(stripped)
msg = 'Mail authentication: %s' % decoded
printer(src_ip_port, dst_ip_port, msg)
except TypeError:
pass
mail_auths[src_ip_port].append(ack)
# Server responses to client
# seq always = last ack of tcp stream
elif dst_ip_port in mail_auths:
if seq in mail_auths[dst_ip_port][-1]:
# Look for any kind of auth failure or success
a_s = 'Authentication successful'
a_f = 'Authentication failed'
# SMTP auth was successful
if full_load.startswith('235') and 'auth' in full_load.lower():
# Reversed the dst and src
printer(dst_ip_port, src_ip_port, a_s)
found = True
try:
del mail_auths[dst_ip_port]
except KeyError:
pass
# SMTP failed
elif full_load.startswith('535 '):
# Reversed the dst and src
printer(dst_ip_port, src_ip_port, a_f)
found = True
try:
del mail_auths[dst_ip_port]
except KeyError:
pass
# IMAP/POP/SMTP failed
elif ' fail' in full_load.lower():
# Reversed the dst and src
printer(dst_ip_port, src_ip_port, a_f)
found = True
try:
del mail_auths[dst_ip_port]
except KeyError:
pass
# IMAP auth success
elif ' OK [' in full_load:
# Reversed the dst and src
printer(dst_ip_port, src_ip_port, a_s)
found = True
try:
del mail_auths[dst_ip_port]
except KeyError:
pass
# Pkt was not an auth pass/fail so its just a normal server ack
# that it got the client's first auth pkt
else:
if len(mail_auths) > 100:
mail_auths.popitem(last=False)
mail_auths[dst_ip_port].append(ack)
# Client to server but it's a new TCP seq
# This handles most POP/IMAP/SMTP logins but there's at least one edge case
else:
mail_auth_search = re.match(mail_auth_re, full_load, re.IGNORECASE)
if mail_auth_search != None:
auth_msg = full_load
# IMAP uses the number at the beginning
if mail_auth_search.group(1) != None:
auth_msg = auth_msg.split()[1:]
else:
auth_msg = auth_msg.split()
# Check if its a pkt like AUTH PLAIN dvcmQxIQ==
# rather than just an AUTH PLAIN
if len(auth_msg) > 2:
mail_creds = ' '.join(auth_msg[2:])
msg = 'Mail authentication: %s' % mail_creds
printer(src_ip_port, dst_ip_port, msg)
mail_decode(src_ip_port, dst_ip_port, mail_creds)
try:
del mail_auths[src_ip_port]
except KeyError:
pass
found = True
# Mail auth regex was found and src_ip_port is not in mail_auths
# Pkt was just the initial auth cmd, next pkt from client will hold creds
if len(mail_auths) > 100:
mail_auths.popitem(last=False)
mail_auths[src_ip_port] = [ack]
# At least 1 mail login style doesn't fit in the original regex:
# 1 login "username" "password"
# This also catches FTP authentication!
# 230 Login successful.
elif re.match(mail_auth_re1, full_load, re.IGNORECASE) != None:
# FTP authentication failures trigger this
#if full_load.lower().startswith('530 login'):
# return
auth_msg = full_load
auth_msg = auth_msg.split()
if 2 < len(auth_msg) < 5:
mail_creds = ' '.join(auth_msg[2:])
msg = 'Authentication: %s' % mail_creds
printer(src_ip_port, dst_ip_port, msg)
mail_decode(src_ip_port, dst_ip_port, mail_creds)
found = True
if found == True:
return True
def irc_logins(full_load, pkt):
'''
Find IRC logins
'''
user_search = re.match(irc_user_re, full_load)
pass_search = re.match(irc_pw_re, full_load)
pass_search2 = re.search(irc_pw_re2, full_load.lower())
if user_search:
msg = 'IRC nick: %s' % user_search.group(1)
return msg
if pass_search:
msg = 'IRC pass: %s' % pass_search.group(1)
return msg
if pass_search2:
msg = 'IRC pass: %s' % pass_search2.group(1)
return msg
def other_parser(src_ip_port, dst_ip_port, full_load, ack, seq, pkt, verbose):
'''
Pull out pertinent info from the parsed HTTP packet data
'''
user_passwd = None
http_url_req = None
method = None
http_methods = ['GET ', 'POST ', 'CONNECT ', 'TRACE ', 'TRACK ', 'PUT ', 'DELETE ', 'HEAD ']
http_line, header_lines, body = parse_http_load(full_load, http_methods)
headers = headers_to_dict(header_lines)
if 'host' in headers:
host = headers['host']
else:
host = ''
if http_line != None:
method, path = parse_http_line(http_line, http_methods)
http_url_req = get_http_url(method, host, path, headers)
if http_url_req != None:
if verbose == False:
if len(http_url_req) > 98:
http_url_req = http_url_req[:99] + '...'
printer(src_ip_port, None, http_url_req)
# Print search terms
searched = get_http_searches(http_url_req, body, host)
if searched:
printer(src_ip_port, dst_ip_port, searched)
# Print user/pwds
if body != '':
user_passwd = get_login_pass(body)
if user_passwd != None:
try:
http_user = user_passwd[0].decode('utf8')
http_pass = user_passwd[1].decode('utf8')
# Set a limit on how long they can be prevent false+
if len(http_user) > 75 or len(http_pass) > 75:
return
user_msg = 'HTTP username: %s' % http_user
printer(src_ip_port, dst_ip_port, user_msg)
pass_msg = 'HTTP password: %s' % http_pass
printer(src_ip_port, dst_ip_port, pass_msg)
except UnicodeDecodeError:
pass
# Print POST loads
# ocsp is a common SSL post load that's never interesting
if method == 'POST' and 'ocsp.' not in host:
try:
if verbose == False and len(body) > 99:
# If it can't decode to utf8 we're probably not interested in it
msg = 'POST load: %s...' % body[:99].encode('utf8')
else:
msg = 'POST load: %s' % body.encode('utf8')
printer(src_ip_port, None, msg)
except UnicodeDecodeError:
pass
# Kerberos over TCP
decoded = Decode_Ip_Packet(str(pkt)[14:])
kerb_hash = ParseMSKerbv5TCP(decoded['data'][20:])
if kerb_hash:
printer(src_ip_port, dst_ip_port, kerb_hash)
# Non-NETNTLM NTLM hashes (MSSQL, DCE-RPC,SMBv1/2,LDAP, MSSQL)
NTLMSSP2 = re.search(NTLMSSP2_re, full_load, re.DOTALL)
NTLMSSP3 = re.search(NTLMSSP3_re, full_load, re.DOTALL)
if NTLMSSP2:
parse_ntlm_chal(NTLMSSP2.group(), ack)
if NTLMSSP3:
ntlm_resp_found = parse_ntlm_resp(NTLMSSP3.group(), seq)
if ntlm_resp_found != None:
printer(src_ip_port, dst_ip_port, ntlm_resp_found)
# Look for authentication headers
if len(headers) == 0:
authenticate_header = None
authorization_header = None
for header in headers:
authenticate_header = re.match(authenticate_re, header)
authorization_header = re.match(authorization_re, header)
if authenticate_header or authorization_header:
break
if authorization_header or authenticate_header:
# NETNTLM
netntlm_found = parse_netntlm(authenticate_header, authorization_header, headers, ack, seq)
if netntlm_found != None:
printer(src_ip_port, dst_ip_port, netntlm_found)
# Basic Auth
parse_basic_auth(src_ip_port, dst_ip_port, headers, authorization_header)
def get_http_searches(http_url_req, body, host):
'''
Find search terms from URLs. Prone to false positives but rather err on that side than false negatives
search, query, ?s, &q, ?q, search?p, searchTerm, keywords, command
'''
false_pos = ['i.stack.imgur.com']
searched = None
if http_url_req != None:
searched = re.search(http_search_re, http_url_req, re.IGNORECASE)
if searched == None:
searched = re.search(http_search_re, body, re.IGNORECASE)
if searched != None and host not in false_pos:
searched = searched.group(3)
# Eliminate some false+
try:
# if it doesn't decode to utf8 it's probably not user input
searched = searched.decode('utf8')
except UnicodeDecodeError:
return
# some add sites trigger this function with single digits
if searched in [str(num) for num in range(0,10)]:
return
# nobody's making >100 character searches
if len(searched) > 100:
return
msg = 'Searched %s: %s' % (host, unquote(searched.encode('utf8')).replace('+', ' '))
return msg
def parse_basic_auth(src_ip_port, dst_ip_port, headers, authorization_header):
'''
Parse basic authentication over HTTP
'''
if authorization_header:
# authorization_header sometimes is triggered by failed ftp
try:
header_val = headers[authorization_header.group()]
except KeyError:
return
b64_auth_re = re.match('basic (.+)', header_val, re.IGNORECASE)
if b64_auth_re != None:
basic_auth_b64 = b64_auth_re.group(1)
try:
basic_auth_creds = base64.decodestring(basic_auth_b64)
except Exception:
return
msg = 'Basic Authentication: %s' % basic_auth_creds
printer(src_ip_port, dst_ip_port, msg)
def parse_netntlm(authenticate_header, authorization_header, headers, ack, seq):
'''
Parse NTLM hashes out
'''
# Type 2 challenge from server
if authenticate_header != None:
chal_header = authenticate_header.group()
parse_netntlm_chal(headers, chal_header, ack)
# Type 3 response from client
elif authorization_header != None:
resp_header = authorization_header.group()
msg = parse_netntlm_resp_msg(headers, resp_header, seq)
if msg != None:
return msg
def parse_snmp(src_ip_port, dst_ip_port, snmp_layer):
'''
Parse out the SNMP version and community string
'''
if type(snmp_layer.community.val) == str:
ver = snmp_layer.version.val
msg = 'SNMPv%d community string: %s' % (ver, snmp_layer.community.val)
printer(src_ip_port, dst_ip_port, msg)
return True
def get_http_url(method, host, path, headers):
'''
Get the HTTP method + URL from requests
'''
if method != None and path != None:
# Make sure the path doesn't repeat the host header
if host != '' and not re.match('(http(s)?://)?'+host, path):
http_url_req = method + ' ' + host + path
else:
http_url_req = method + ' ' + path
http_url_req = url_filter(http_url_req)
return http_url_req
def headers_to_dict(header_lines):
'''
Convert the list of header lines into a dictionary
'''
headers = {}
for line in header_lines:
lineList=line.split(': ', 1)
key=lineList[0].lower()
if len(lineList)>1:
headers[key]=lineList[1]
else:
headers[key]=""
return headers
def parse_http_line(http_line, http_methods):
'''
Parse the header with the HTTP method in it
'''
http_line_split = http_line.split()
method = ''
path = ''
# Accounts for pcap files that might start with a fragment
# so the first line might be just text data
if len(http_line_split) > 1:
method = http_line_split[0]
path = http_line_split[1]
# This check exists because responses are much different than requests e.g.:
# HTTP/1.1 407 Proxy Authentication Required ( Access is denied. )
# Add a space to method because there's a space in http_methods items
# to avoid false+
if method+' ' not in http_methods:
method = None
path = None
return method, path
def parse_http_load(full_load, http_methods):
'''
Split the raw load into list of headers and body string
'''
try:
headers, body = full_load.split("\r\n\r\n", 1)
except ValueError:
headers = full_load
body = ''
header_lines = headers.split("\r\n")
# Pkts may just contain hex data and no headers in which case we'll
# still want to parse them for usernames and password
http_line = get_http_line(header_lines, http_methods)
if not http_line:
headers = ''
body = full_load
header_lines = [line for line in header_lines if line != http_line]
return http_line, header_lines, body
def get_http_line(header_lines, http_methods):
'''
Get the header with the http command
'''
for header in header_lines:
for method in http_methods:
# / is the only char I can think of that's in every http_line
# Shortest valid: "GET /", add check for "/"?
if header.startswith(method):
http_line = header
return http_line
def parse_netntlm_chal(headers, chal_header, ack):
'''
Parse the netntlm server challenge
https://code.google.com/p/python-ntlm/source/browse/trunk/python26/ntlm/ntlm.py
'''
try:
header_val2 = headers[chal_header]
except KeyError:
return
header_val2 = header_val2.split(' ', 1)
# The header value can either start with NTLM or Negotiate
if header_val2[0] == 'NTLM' or header_val2[0] == 'Negotiate':
try:
msg2 = header_val2[1]
except IndexError:
return
msg2 = base64.decodestring(msg2)
parse_ntlm_chal(msg2, ack)
def parse_ntlm_chal(msg2, ack):
'''
Parse server challenge
'''
global challenge_acks
Signature = msg2[0:8]
try:
msg_type = struct.unpack("<I",msg2[8:12])[0]
except Exception:
return
assert(msg_type==2)
ServerChallenge = msg2[24:32].encode('hex')
# Keep the dict of ack:challenge to less than 50 chals
if len(challenge_acks) > 50:
challenge_acks.popitem(last=False)
challenge_acks[ack] = ServerChallenge
def parse_netntlm_resp_msg(headers, resp_header, seq):
'''
Parse the client response to the challenge
'''
try:
header_val3 = headers[resp_header]
except KeyError:
return
header_val3 = header_val3.split(' ', 1)
# The header value can either start with NTLM or Negotiate
if header_val3[0] == 'NTLM' or header_val3[0] == 'Negotiate':
try:
msg3 = base64.decodestring(header_val3[1])
except binascii.Error:
return
return parse_ntlm_resp(msg3, seq)
def parse_ntlm_resp(msg3, seq):
'''
Parse the 3rd msg in NTLM handshake
Thanks to psychomario
'''
if seq in challenge_acks:
challenge = challenge_acks[seq]
else:
challenge = 'CHALLENGE NOT FOUND'
if len(msg3) > 43:
# Thx to psychomario for below
lmlen, lmmax, lmoff, ntlen, ntmax, ntoff, domlen, dommax, domoff, userlen, usermax, useroff = struct.unpack("12xhhihhihhihhi", msg3[:44])
lmhash = binascii.b2a_hex(msg3[lmoff:lmoff+lmlen])
nthash = binascii.b2a_hex(msg3[ntoff:ntoff+ntlen])
domain = msg3[domoff:domoff+domlen].replace("\0", "")
user = msg3[useroff:useroff+userlen].replace("\0", "")
# Original check by psychomario, might be incorrect?
#if lmhash != "0"*48: #NTLMv1
if ntlen == 24: #NTLMv1
msg = '%s %s' % ('NETNTLMv1:', user+"::"+domain+":"+lmhash+":"+nthash+":"+challenge)
return msg
elif ntlen > 60: #NTLMv2
msg = '%s %s' % ('NETNTLMv2:', user+"::"+domain+":"+challenge+":"+nthash[:32]+":"+nthash[32:])
return msg
def url_filter(http_url_req):
'''
Filter out the common but uninteresting URLs
'''
if http_url_req:
d = ['.jpg', '.jpeg', '.gif', '.png', '.css', '.ico', '.js', '.svg', '.woff']
if any(http_url_req.endswith(i) for i in d):
return
return http_url_req
def get_login_pass(body):
'''
Regex out logins and passwords from a string
'''
user = None
passwd = None
# Taken mainly from Pcredz by Laurent Gaffie
userfields = ['log','login', 'wpname', 'ahd_username', 'unickname', 'nickname', 'user', 'user_name',
'alias', 'pseudo', 'email', 'username', '_username', 'userid', 'form_loginname', 'loginname',
'login_id', 'loginid', 'session_key', 'sessionkey', 'pop_login', 'uid', 'id', 'user_id', 'screename',
'uname', 'ulogin', 'acctname', 'account', 'member', 'mailaddress', 'membername', 'login_username',
'login_email', 'loginusername', 'loginemail', 'uin', 'sign-in', 'usuario']
passfields = ['ahd_password', 'pass', 'password', '_password', 'passwd', 'session_password', 'sessionpassword',
'login_password', 'loginpassword', 'form_pw', 'pw', 'userpassword', 'pwd', 'upassword', 'login_password'
'passwort', 'passwrd', 'wppassword', 'upasswd','senha','contrasena']
for login in userfields:
login_re = re.search('(%s=[^&]+)' % login, body, re.IGNORECASE)
if login_re:
user = login_re.group()
for passfield in passfields:
pass_re = re.search('(%s=[^&]+)' % passfield, body, re.IGNORECASE)
if pass_re:
passwd = pass_re.group()
if user and passwd:
return (user, passwd)
def printer(src_ip_port, dst_ip_port, msg):
if dst_ip_port != None:
print_str = '[%s > %s] %s%s%s' % (src_ip_port, dst_ip_port, T, msg, W)
# All credentials will have dst_ip_port, URLs will not
# Prevent identical outputs unless it's an HTTP search or POST load
skip = ['Searched ', 'POST load:']
for s in skip:
if s not in msg:
if os.path.isfile('credentials.txt'):
with open('credentials.txt', 'r') as log:
contents = log.read()
if msg in contents:
return
print print_str
# Escape colors like whatweb has
ansi_escape = re.compile(r'\x1b[^m]*m')
print_str = ansi_escape.sub('', print_str)
# Log the creds
logging.info(print_str)
else:
print_str = '[%s] %s' % (src_ip_port.split(':')[0], msg)
print print_str
def main(args):
##################### DEBUG ##########################
## Hit Ctrl-C while program is running and you can see
## whatever variable you want within the IPython cli
## Don't forget to uncomment IPython in imports
#def signal_handler(signal, frame):
# embed()
## sniff(iface=conf.iface, prn=pkt_parser, store=0)
# sys.exit()
#signal.signal(signal.SIGINT, signal_handler)
######################################################
# Read packets from either pcap or interface
if args.pcap:
try:
for pkt in PcapReader(args.pcap):
pkt_parser(pkt)
except IOError:
exit('[-] Could not open %s' % args.pcap)
else:
# Check for root
if geteuid():
exit('[-] Please run as root')
#Find the active interface
if args.interface:
conf.iface = args.interface
else:
conf.iface = iface_finder()
print '[*] Using interface:', conf.iface
if args.filterip:
sniff(iface=conf.iface, prn=pkt_parser, filter="not host %s" % args.filterip, store=0)
else:
sniff(iface=conf.iface, prn=pkt_parser, store=0)
if __name__ == "__main__":
main(parse_args())
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