I am running Cain and I got kerberos5 PreAuth Hash when I was sniffing the network, so I am doing a Brute-Force Attack, I set the password length from 6 to 8 lower letters and numbers and take so looooong, that I run it for about 2 1/2 week, I did a test with one password 4 letters and I put the only letters in that password and that was fast, but that is not the normal scenario (in this case I know the passord).
Do you know another tool to Brute Force password a little fast?
Rainbow tables are precomputed hashes so all you have to do to determine the password is do a lookup. The trade off is lots of storage vs. lots of time. You can find some details on wikipedia. http://en.wikipedia.org/wiki/Rainbow_table
As an asside, here is how keberos authentication works in a nice little picture
How much time do you have on your hands? lol I can’t think of some place off hand that has a Kerberos rainbow table available for download and the table would probably be MASSIVE because kerberos hashes are more complex. Perhaps a dictionary attack would be quicker?