Irregular Expressions

Feb 22 2011   11:23PM GMT

Using John the Ripper to brute md5 hashes – Part 3

Dan O'Connor Dan O'Connor Profile: Dan O'Connor

To start john with a list of passwords to try you can use;

john --wordlist=english.txt --pot=out --format=raw-MD5 u_password

The input english.txt is a dictionary file, and this is NOT pre-hashed.  John will run through the list and hash the string then compare it to the ‘u_password’ file looking for a match then put the output to ‘out’.

Next is the incremental,

john -i --pot=out --format=raw-MD5 u_password

This will start running though all possible combination of characters hashing them and then looking for a match.

Now if you have installed john on windows and are confused as to why ‘raw-MD5’ won’t work, your right it won’t!  You need to install a patch to get it working.

This will take a lot of time depending on the system you are running this on, but count on 8 letter passwords taking several days.

 Comment on this Post

There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when other members comment.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to:

Share this item with your network: