Crack Windows Passwords With Ophcrack and Rainbow Tables
Cracking a Windows Password with Ophcrack with the use of rainbow tables, relatively easy if you take the right steps and if the computer can boot from a disc. The free, open source Ophcrack Live CD is a Windows account password cracking tool designed to help you recover lost Windows passwords. Whether you need to recover the lost password to a Windows account, you're looking to ensure that your passwords are secure, or you're a super l33t h4x0r, the Ophcrack Live CD is a pretty useful tool. The Ophcrack Project has recently released a Linux Live-CD based on SLAX that can be used to retrieve and crack passwords from Windows machines with little or no effort.
Steps
- Go to The Ophcrack Website and download the ophcrack Livecd iso that is offered there (~455 MB).
- Burn the iso file to CD using an image burning software.
- Put the CD in the disc drive of the computer you want to crack the passwords of.
- Boot from disc. This shouldn't be to hard. Depending on computer, enter the bios settings and change the boot settings to boot from a disc drive on first boot device.
- Exit BIOS setting.
- Ophcrack will initiate by itself.
- The logo screen should appear, at which you should hit enter. Text should scroll down the screen, and eventually you will have a graphical interface pop up, with the one and only window (Ophcrack).
- Once the system is done, select the user account you wish to recover the password for, and click launch.
- Depending on the speed of your system, the cracker will go to work, and if it can determine and decrypt your password, it will eventually display it in the "NT Password" column
Tips
- Ophcrack is a Windows password cracker based on a time-memory trade-off using rainbow tables. This is a new variant of Hellman's original trade-off, with better performance. It recovers 99.9% of alphanumeric passwords in seconds.
