What is ophcrack?

Ophcrack is a free Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a Graphical User Interface and runs on multiple platforms. Features:» Runs on Windows, Linux/Unix, Mac OS X, ...» Cracks LM and NTLM hashes.» Free tables available for Windows XP and Vista.» Brute-force module for simple