Completing an assignment for my Ethical Hacking unit at University at the moment and the first task I have is to crack some passwords.
Decided to use backtrack to crack some passwords from a Windows XP box I set up.
I'm using bkhive and samdump2 to get the encryption key to unencrypted the SAM file and dump it into a text file.
I'm then using John the Ripper to crack the password hashes, this is working fine with "short passwords" but when I try it with long passwords of say 20 characters it just says that there is no password for that account.
Anyone got any idea what's going on?
EDIT: Just to make it clear, it doesn't even attempt to crack the password, it just says that the user has no password after about 10 second of the program running. I'm aware that it would take an awful long time to crack the password.
It thinks that it has cracked the password: have a look at this: http://aporcupine.com/john.png