Tutorial: Password Extraction

Contents

This tutorial discusses the plugin pwX. It extracts passwords from clear text protocols such as FTP, POP3, SMTP, HTTP, Telnet, IRC, LDAP, etc.

Preparation

Before we start we need to prepare T2. If you did not complete the tutorials before just follow the procedure described below.

First I recommend to set T2 into a pristine state by removing all unnecessary or older plugins from the plugin folder ~/.tranalyzer/plugins and compile the standard plugins. Just as a precaution if you have some old plugins or files there. If you like to keep them, please copy them away.

$ t2build -e
Are you sure you want to empty the plugin folder '/home/wurst/.tranalyzer/plugins' (y/N)? y
Plugin folder emptied
$
$ t2build tranalyzer2 basicFlow pwX txtSink
...
BUILD SUCCESSFUL

$

If you did not create a separate data and results directory yet, please do it now in another cmd window. It will facilitate your workflow:

$ mkdir ~/data ~/results
$

Download the sample pcap if did not do it already: ftp_fail.pcap. Now you’re all set.

pwX

We needed something fast, because we had a job at a large operator demanding to go through TB of traffic and to look online for unencrypted internal content, although having a protocol port denoting encryption. It was a pretty astonishing success and was expanded to other interesting protocols.

The configuration of pwX is listed below. To increase performance you may switch off certain protocols. Here we leave default.

$ pwX
$ vi src/pwX.h

Now execute t2 on the pcap.

$ t2 -r ~/data/ftp_fail.pcap -w ~/results/ -s
================================================================================
Tranalyzer 0.8.10 (Anteater), Tarantula. PID: 11277
================================================================================
[INF] Creating flows for L2, IPv4, IPv6
Active plugins:
    01: basicFlow, 0.8.10
    02: pwX, 0.8.10
    03: txtSink, 0.8.10
[INF] IPv4 Ver: 5, Rev: 16122020, Range Mode: 0, subnet ranges loaded: 406077 (406.08 K)
[INF] IPv6 Ver: 5, Rev: 17122020, Range Mode: 0, subnet ranges loaded: 51069 (51.07 K)
Processing file: /home/wurst/data/tcpdump_ftp.pcap
Link layer type: Ethernet [EN10MB/1]
Dump start: 1392281689.373617 sec (Thu 13 Feb 2014 08:54:49 GMT)
Dump stop : 1392281768.754155 sec (Thu 13 Feb 2014 08:56:08 GMT)
Total dump duration: 79.380538 sec (1m 19s)
Finished processing. Elapsed time: 0.001363 sec
Finished unloading flow memory. Time: 0.001597 sec
Percentage completed: 100.00%
Number of processed packets: 158
Number of processed bytes: 10665 (10.66 K)
Number of raw bytes: 10665 (10.66 K)
Number of pad bytes: 228
Number of pcap bytes: 13217 (13.22 K)
Number of IPv4 packets: 158 [100.00%]
Number of A packets: 74 [46.84%]
Number of B packets: 84 [53.16%]
Number of A bytes: 4713 (4.71 K) [44.19%]
Number of B bytes: 5952 (5.95 K) [55.81%]
Average A packet load: 63.69
Average B packet load: 70.86
--------------------------------------------------------------------------------
pwX: Number of passwords with successful/failed/unknown login: 0/11/0
--------------------------------------------------------------------------------
Headers count: min: 3, max: 3, average: 3.00
Number of TCP packets: 158 [100.00%]
Number of TCP bytes: 10665 (10.66 K) [100.00%]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Number of processed   flows: 22
Number of processed A flows: 11 [50.00%]
Number of processed B flows: 11 [50.00%]
Number of request     flows: 11 [50.00%]
Number of reply       flows: 11 [50.00%]
Total   A/B    flow asymmetry: 0.00
Total req/rply flow asymmetry: 0.00
Number of processed   packets/flows: 7.18
Number of processed A packets/flows: 6.73
Number of processed B packets/flows: 7.64
Number of processed total packets/s: 1.99
Number of processed A+B   packets/s: 1.99
Number of processed A     packets/s: 0.93
Number of processed   B   packets/s: 1.06
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Number of average processed flows/s: 0.28
Average full raw bandwidth: 1075 b/s (1.07 Kb/s)
Average full bandwidth : 1052 b/s (1.05 Kb/s)
Max number of flows in memory: 22 [0.01%]
Memory usage: 0.01 GB [0.02%]
Aggregated flowStat=0x0400000000004000
[INF] IPv4 flows

The end report tells you the status of the logins and the number of passwords extracted. In the flow file you will see all the user names and the failed login attempts.

$ cd ~/results
$ tcol ftp_fail_flows.txt
%dir  flowInd  flowStat            timeFirst          timeLast           duration   numHdrDesc  numHdrs  hdrDesc       srcMac             dstMac             ethType  ethVlanID  srcIP          srcIPCC  srcIPOrg                     srcPort  dstIP          dstIPCC  dstIPOrg                     dstPort  l4Proto  pwxType  pwxUser      pwxPass                pwxStatus
A     1        0x0400000000004000  1392281689.373617  1392281693.223067  3.849450   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25422    192.168.88.99  07       "Private network"            21       6        1        "anonymous"  "mozilla@example.com"  2
B     1        0x0400000000004001  1392281689.373816  1392281693.179667  3.805851   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25422    6        0        ""           ""                     0
A     2        0x0400000000004000  1392281691.525313  1392281695.161688  3.636375   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25423    192.168.88.99  07       "Private network"            21       6        1        "anonymous"  "mozilla@example.com"  2
B     2        0x0400000000004001  1392281691.525491  1392281695.129205  3.603714   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25423    6        0        ""           ""                     0
A     4        0x0400000000004000  1392281695.129583  1392281703.337800  8.208217   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25425    192.168.88.99  07       "Private network"            21       6        1        "tola"       "jola"                 2
B     4        0x0400000000004001  1392281695.129749  1392281703.297126  8.167377   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25425    6        0        ""           ""                     0
A     3        0x0400000000004000  1392281693.179848  1392281710.519526  17.339678  1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25424    192.168.88.99  07       "Private network"            21       6        1        "admin"      "admin"                2
B     3        0x0400000000004001  1392281693.180059  1392281710.484952  17.304893  1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25424    6        0        ""           ""                     0
A     5        0x0400000000004000  1392281719.421912  1392281722.795182  3.373270   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  59519    192.168.88.99  07       "Private network"            21       6        1        "anonymous"  "chrome@example.com"   2
B     5        0x0400000000004001  1392281719.422118  1392281722.795499  3.373381   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  59519    6        0        ""           ""                     0
A     6        0x0400000000004000  1392281727.562162  1392281727.757768  0.195606   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25426    192.168.88.99  07       "Private network"            21       6        1        "anonymous"  "mozilla@example.com"  2
B     6        0x0400000000004001  1392281727.562351  1392281727.725601  0.163250   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25426    6        0        ""           ""                     0
A     7        0x0400000000004000  1392281727.725101  1392281740.293332  12.568231  1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25427    192.168.88.99  07       "Private network"            21       6        1        "1"          "1"                    2
B     7        0x0400000000004001  1392281727.725293  1392281740.261874  12.536581  1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25427    6        0        ""           ""                     0
A     8        0x0400000000004000  1392281741.511674  1392281742.847590  1.335916   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  59520    192.168.88.99  07       "Private network"            21       6        1        "dydy"       "kyky"                 2
B     8        0x0400000000004001  1392281741.511916  1392281742.847898  1.335982   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  59520    6        0        ""           ""                     0
A     9        0x0400000000004000  1392281756.143022  1392281756.340042  0.197020   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25429    192.168.88.99  07       "Private network"            21       6        1        "anonymous"  "mozilla@example.com"  2
B     9        0x0400000000004001  1392281756.143203  1392281756.306635  0.163432   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25429    6        0        ""           ""                     0
A     11       0x0400000000004000  1392281767.031965  1392281767.648826  0.616861   1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  59521    192.168.88.99  07       "Private network"            21       6        1        "kyky"       "dydy"                 2
B     11       0x0400000000004001  1392281767.032159  1392281767.647004  0.614845   1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  59521    6        0        ""           ""                     0
A     10       0x0400000000004000  1392281756.306026  1392281768.754155  12.448129  1           3        eth:ipv4:tcp  00:0c:42:70:ae:9b  b8:27:eb:3b:28:3d  0x0800              178.183.0.2    pl       "statically assigned space"  25430    192.168.88.99  07       "Private network"            21       6        1        "marek"      "marek"                2
B     10       0x0400000000004001  1392281756.306225  1392281768.723276  12.417051  1           3        eth:ipv4:tcp  b8:27:eb:3b:28:3d  00:0c:42:70:ae:9b  0x0800              192.168.88.99  07       "Private network"            21       178.183.0.2    pl       "statically assigned space"  25430    6        0        ""           ""                     0

Have fun fishing for passwords.