SEGI ren auziaren aurkako ekimena

How to start a fire with water

Fish - Credo - Internal Exile

Ophcrack windows password cracking example how it works on windows 7 pas...

Fast NTLM hash cracking with rainbow tables and RainbowCrack for GPU

Hash Cracking with Rainbow Tables

This document explains the rcrack program. The rcrack program lookup existing rainbow tables for the plaintext of user supplied hash.
Six similar programs are available:

http://project-rainbowcrack.com/crack.htm 

HashKiller.co.uk allows you to input an NTLM hash and search for its decrypted state in our database, basically, it's a NTLM cracker / decryption tool.

We have a total of just over 312.072 billion unique decrypted NTLM hashes since August 2007.
Please input the NTLM hashes that you would like to be converted into text / cracked / decrypted. NOTE that space character is replaced with [space]:
Please note the password is after the : character, and the NTLM hash is before it.

https://hashkiller.co.uk/ntlm-decrypter.aspx 

Free Password Hash Cracker

Enter up to 20 non-salted hashes, one per line:

Supports: LM, NTLM, md2, md4, md5, md5(md5_hex), md5-half, sha1, sha224, sha256, sha384, sha512, ripeMD160, whirlpool, MySQL 4.1+ (sha1(sha1_bin))

Download CrackStation's Wordlist

How CrackStation Works

CrackStation uses massive pre-computed lookup tables to crack password hashes. These tables store a mapping between the hash of a password, and the correct password for that hash. The hash values are indexed so that it is possible to quickly search the database for a given hash. If the hash is present in the database, the password can be recovered in a fraction of a second. This only works for "unsalted" hashes. For information on password hashing systems that are not vulnerable to pre-computed lookup tables, see our hashing security page.
Crackstation's lookup tables were created by extracting every word from the Wikipedia databases and adding with every password list we could find. We also applied intelligent word mangling (brute force hybrid) to our wordlists to make them much more effective. For MD5 and SHA1 hashes, we have a 190GB, 15-billion-entry lookup table, and for other hashes, we have a 19GB 1.5-billion-entry lookup table.
You can download CrackStation's dictionaries here, and the lookup table implementation (PHP and C) is available here. 

https://crackstation.net/ 

Cracking Story - How I Cracked Over 122 Million SHA1 and MD5 Hashed Passwords

.... as I only own a classic computer configuration with an AMD Phenom II 4 cores at 3,2 Mhz in addition to an ATI/AMD 5770 graphics card

The password cracking tools I used during this long trip were John the Ripper and oclHashcat-plus. This article is about cracking the provided MD5 hashes of KoreLogic only, but the same strategy was also applied to the SHA1 hashes.
Updates:

• 08/29/2012 – New example in the John the Ripper section: "Crack double MD5 hashes with the help of dict2hash.pl script"
• 08/29/2012 – New download! All in one sorted and cleaned version.

http://blog.thireus.com/cracking-story-how-i-cracked-over-122-million-sha1-and-md5-hashed-passwords/ 

John the Ripper GPU support

• Latest release include more formats and latest git trees include even more.
• CUDA significantly benefits from compile-time tuning of parameters for a given GPU, see doc/README-CUDA
• sha512crypt is currently faster on NVIDIA than on AMD/ATI, and moreover the OpenCL code is currently faster than CUDA (unusual)
• bcrypt is sort of supposed to be inefficient on GPU, so it achieves at best CPU-like performance currently (yet you do get the option to put your many GPUs to at least some reasonable use if you only have bcrypt hashes to attack)
• WPA-PSK CUDA uses a little bit of CPU code as well, and benefits from OpenMP (so you'll get slightly faster speed if you enable OpenMP in the JtR build, although you'll load multiple CPU cores then). The OpenCL version has post-processing on GPU too so doesn't use much CPU resources and will not benefit from OpenMP.
• RAR is a mix of CPU and GPU code, with the ratio varying widely between different RAR archives (type, size). Later versions has mature “early reject” code that minimizes this.
   
• http://openwall.info/wiki/john/GPU 

   High performance password cracking by implementing rainbow tables.pdf by Elsa Cristina David on Scribd