How to Use Ophcrack

Ophcrack is a program used to recover lost Windows passwords.

Ophcrack hacks and cracks the Windows password LM hashes based on a time-memory trade-off using rainbow tables

Things you will need

  • Computer
  • Ophcrack program


  1. Load the Ophcrack CD to the computer, install and run it.
  2. Click on Load and select the appropriate password LM (LAN Manager) hash to use or choose PWDUMP File if the hash was dumped and saved using pwdump2.
  3. Otherwise, choose encrypted SAM to allow Ophcrack to dump the hashes from the SAM and SYSTEM files retrieved from a Windows machine while booting on another disk.
  4. Click Tables, and select the location or folder to store the rainbow hash tables downloaded or installed by the installer.
  5. Select the type of tables you wish to use
  6. Click Launch to start the cracking process.


  • You can use free table sets with Windows passwords that contain upper and lowercase letters and numbers.
  • Use WebSec06 WS-20k table sets to crack passwords with special characters and mixed case letters.