Ophcrack is a free open source (GPL licensed) program that cracks Windows log-in passwords by using LM hashes through rainbow tables. The program includes the ability to import the hashes from a variety of formats, including dumping directly from the SAM files of Windows. On most computers, ophcrack can crack most passwords within a few minutes.
3.8.0 / March 6, 2018
|Written in||C++, C|
|Operating system||Microsoft Windows, Linux, Mac OS X|
|License||GNU General Public License|
Rainbow tables for LM hashes are provided for free by the developers. By default, ophcrack is bundled with tables that allows it to crack passwords no longer than 14 characters using only alphanumeric characters. Available for free download are four Windows XP tables and four Windows Vista tables.
Ophcrack is also available as Live CD distributions which automate the retrieval, decryption, and cracking of passwords from a Windows system. One Live CD distribution is available for Windows XP and lower, as well as another for Windows Vista and Windows 7. The Live CD distributions of ophcrack are built with SliTaz GNU/Linux.
Starting with version 2.3, Ophcrack also cracks NTLM hashes. This is necessary if the generation of the LM hash is disabled (this is default for Windows Vista), or if the password is longer than 14 characters (in which case the LM hash is not stored).
Starting with version 3.7.0, the source code has been moved from SourceForge to GitLab.
- "OPH Reviews". Pcsupport.about.com. 2011-07-30. Retrieved 2012-02-21.
- "Rainbow Tables for ophcrack". Ophcrack.sourceforge.net. Retrieved 2012-02-21.
- "Objectif Sécurité. A leading Swiss company in the field of information systems security". Objectif-securite.ch. Archived from the original on 2012-02-20. Retrieved 2012-02-21.
- "Download ophcrack". Ophcrack.sourceforge.net. Retrieved 2012-02-21.
- "Ophcrack 3.7.0 released". Ophcrack.sourceforge.net. 2017-03-30. Retrieved 2017-04-06.
|The Wikibook Reverse Engineering has a page on the topic of: Cracking Windows XP Passwords|
- Official website
- Ophcrack Online Demo - form to submit hashes and instantly crack passwords
- Ophcrack no table found - how to fix if Ophcrack says "no tables found".
- Ophcrack LiveCD 2 Tutorial
- Quick fix if Ophcrack doesn't work
- OPHCRACK (the time-memory-trade-off-cracker) - École Polytechnique Fédérale de Lausanne
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