password cracking guide

bofh28 · #1 (**permalink**) 01-28-2008, 10:45 PM

The goal is to unify all of the good information found in various bits and pieces into 1 large document. This document is for people who want to learn to the how and why of password cracking. There is a lot of information being presented and you should READ IT ALL BEFORE you attempted doing anything documented here. I do my best to provide step by step instructions along with the reasons for doing it this way. Other times I will point to a particular website where you find the information. In those cases someone else has done what I attempting and did a good or great job and I didn’t want to steal their hard work. These instructions have several excerpts from a combination of posts from pureh@te, granger53, irongeek, PrairieFire, and stasik. I would also like to thank each of them and others for the help they have provided me on the BackTrack forum.

I had to compress the document so I could attach it. The document as it stands now is 93K. Please let me know if what I have is wrong, or if there is a better way to do something, or if I am missing something. I am planning on making enhancements as people make me aware of them.

Here is the table of contents

Code:

1 LM vs. NTLM
2 Syskey
3 Cracking Windows Passwords
   3.1 Extracting the hashes from the Windows SAM
      3.1.1 Using BackTrack Tools
         3.1.1.1 Using bkhive and samdump v1.1.1 (BT2 and BT3)
         3.1.1.2 Using new samdump2 version 2.0 (BT4)
         3.1.1.3 Cached Credentials
      3.1.2 Using Windows Tools
         3.1.2.1 Using fgdump
         3.1.2.2 Using gsecdump
         3.1.2.3 Using pwdump7
         3.1.2.4 Cached Credentials
   3.2 Extracting the hashes from the Windows SAM remotely
      3.2.1 Using BackTrack Tools
         3.2.1.1 ettercap
      3.2.2 Using Windows Tools
         3.2.2.1 Using fgdump
   3.3 Cracking Windows Passwords
      3.3.1 Using BackTrack Tools
         3.3.1.1 John the Ripper 1.7.2
            3.3.1.1.1 Cracking the LM hash
            3.3.1.1.2 Cracking the NTLM hash
            3.3.1.1.3 Cracking the NTLM using the cracked LM hash
            3.3.1.1.4 Cracking cached credentials
         3.3.1.2 John the Ripper 1.7.3.1
            3.3.1.2.1 Get and Compile
            3.3.1.2.2 Cracking the LM hash
            3.3.1.2.3 Cracking the LM hash using known letter(s) in known location(s) (knownforce)
            3.3.1.2.4 Cracking the NTLM hash
            3.3.1.2.5 Cracking the NTLM hash using the cracked LM hash (dumbforce)
            3.3.1.2.6 Cracking cached credentials
         3.3.1.3 Using MDCrack
            3.3.1.3.1 Cracking the LM hash
            3.3.1.3.2 Cracking the NTLM hash
            3.3.1.3.3 Cracking the NTLM hash using the cracked LM hash
         3.3.1.4 Using Ophcrack
            3.3.1.4.1 Cracking the LM hash
            3.3.1.4.2 Cracking the NTLM hash
            3.3.1.4.3 Cracking the NTLM hash using the cracked LM hash
      3.3.2 Using Windows Tools
         3.3.2.1 John the Ripper
            3.3.2.1.1 Cracking the LM hash
            3.3.2.1.2 Cracking the NTLM hash
            3.3.2.1.3 Cracking the NTLM hash using the cracked LM hash
            3.3.2.1.4 Cracking cached credentials
         3.3.2.2 Using MDCrack
            3.3.2.2.1 Cracking the LM hash
            3.3.2.2.2 Cracking the NTLM hash
            3.3.2.2.3 Cracking the NTLM hash using the cracked LM hash
         3.3.2.3 Using Ophcrack
            3.3.2.3.1 Cracking the LM hash
            3.3.2.3.2 Cracking the NTLM hash
            3.3.2.3.3 Cracking the NTLM hash using the cracked LM hash
         3.3.2.4 Using Cain and Abel
      3.3.3 Using a Live CD
         3.3.3.1 Ophcrack
4. Changing Windows Passwords
   4.1 Changing Local User Passwords
      4.1.1 Using BackTrack Tools
         4.1.1.1 chntpw
      4.1.2 Using a Live CD
         4.1.2.1 chntpw
         4.1.2.2 System Rescue CD
   4.2 Changing Active Directory Passwords
5 plain-text.info
6 Cracking Novell NetWare Passwords
7 Cracking Linux/Unix Passwords
8 Cracking networking equipment passwords
   8.1 Using BackTrack tools
      8.1.1 Using Hydra
      8.1.2 Using Xhydra
      8.1.3 Using Medusa
      8.1.4 Using John the Ripper to crack a Cisco hash
   8.2 Using Windows tools
      8.2.1 Using Brutus
9 Cracking Applications
   9.1 Cracking Oracle 11g (sha1)
   9.2 Cracking Oracle passwords over the wire
   9.3 Cracking Office passwords
   9.4 Cracking tar passwords
   9.5 Cracking zip passwords
   9.6 Cracking pdf passwords
10 Wordlists aka Dictionary attack
   10.1 Using John the Ripper to generate a wordlist
   10.2 Configuring John the Ripper to use a wordlist
   10.3 Using crunch to generate a wordlist
   10.4 Generate a wordlist from a textfile or website
   10.5 Using premade wordlists
   10.6 Other wordlist generators
   10.7 Manipulating your wordlist
11 Rainbow Tables
   11.1 What are they?
   11.2 Generating your own
      11.2.1 rcrack - obsolete but works
      11.2.2 rcracki
      11.2.3 rcracki - boinc client
      11.2.4 Generating a rainbow table
   11.3 WEP cracking
   11.4 WPA-PSK

Thanks,

P.S. Thank you everyone for your feedback. Keep it coming.

Changes from version 0.1
* Added a section on plain-text.info
* Added a section on using john the ripper with a custom character list
* Added Xploitz’s and pureh@te’s wordlists

Changes from version 0.2 - 200 downloads
* Added sections on using ophcrack
* Added sections on Cain and Able under windows
* Fixed a typo
* New html format

Changes from version 0.3 - 410 downloads
* Moved some content to where it should have been
* Added a section on crunch
* Fixed typos
* Fixed a whole lot of html issues
* Slightly rearranged things to flow better

Changes from version 0.4 - 877 downloads
* Added a section on cached credentials
* Expanded the Novell section
* Fixed typos
* Fixed a couple of html errors
* Moved some things around
* New utility to dump passwords

Changes from version 0.5 - 1573 downloads
* added wpa pw-inspector command
* added a wordlist manipulation section
* added usage of fgdump
* added rcracki section
* added a sample hash.txt to play with
* john can be used for input to aircrack-ng
* moved a few things around for a better flow

Changes from version 0.6 - 422 downloads
* added a section on generating a wordlist from a website
* added head, tail, and sed commands to wordlist manipulation
* added a section on xhdrya (pointing to Pureh@te's video)
* added a section on gsecdump
* added a section on medusa
* added a section on cisco
* expanded the crunch section
* moved everything around in an effort to make things easier to find
* the dumbforce and knownforce are not finished

Changes from version 0.7 - 4596 downloads
* Fixed john --incremental=All --stdout | aircrack-ng -b 00:11:22:33:44:55 -w --test.cap
missing a - Thanks to roblad for pointing it out

Changes from version 0.8
* updated the guide to support BT4-Pre-Final
* switched from transitional html to strict html
* added a section on cracking office passwords
* added a section on cracking rar passwords
* added a section on cracking zip passwords
* added a section on cracking pdf passwords
* added instructions for remote password dumping for fgdump
* point users to john the ripper wiki for dumbforce and knownforce usage
* convert text urls to links
* updated links
* update versions of software (wine and rcrack)
* fixed several spelling mistakes

stasik · #2 (**permalink**) 01-31-2008, 03:01 PM

glad u managed it. well writen

The_Denv · #3 (**permalink**) 01-31-2008, 04:55 PM

Nice job bofh, very well structured and its nice that you gave credit where it was due. I like everything in one solid document, I like this document.