I wanted to crack my windows xp passwords contained in the SAM file with john the ripper, this file contains hashed passwords with NTLM algorithm, but when i use this command to specify the hashing algorithm
john --format=netntlm password.txt, i get the following error
Unknown ciphertext format name requested.
And when i try to crack the password file without the format option, then john the ripper uses the LM algorithm, so this way it will never find the password.
How can i add some new hashing algorithms to john the ripper ??!!
PS : I am using ubuntu 15.10 (with Linux kernel > 4), and i installed john the ripper from Ubuntu repositories.