questions about cracking password with Cain....

["Jorge L. Vazquez" <jlvazquez825 () gmail com>]

one thing that has happened to me with Cain is that when pulling a MITM 
attack on a victim to sniff off password, I can get the password for 
pop3, telnet, ftp with no problem; well those are sent in clear text 
over the network with no kind of encryption, but when I try to dump the 
hashes from a windows box login/authentication with a Domain Controller 
or when trying to access a share on the network via UNC path....I get 
the hashes in the sniffer session in Cain, and then import them into 
crack session to do a dictionary or  brute force attack, but when I 
actually launch the attack it doesn't load the hashes; I get the error 
no hashes imported, like if Cain is not recognizing the hashes or the 
hashes are in the wrong format.....do I have to modify this hashes for 
Cain to understand them....or am I missing something here


Thanks
Jorge L. Vazquez

www.pctechtips.org