6 - Braingathering

We fought our way to the main server room. The zombies realized that they run out of humans sooner or later, so they started to build machines to create humans for them to eat. Those machines have a special code which is only known to the zombies. This code is capable of destroying all breeding-machines. Now, it's all up to you to get this code and tell us so that we can destroy all machines. SSH: ctf.fluxfingers.net PORT: 1236 USER: ctf PASS: opPsyuXs7aaxtop
 

credits: 500 +3 (1st), +2 (2nd), +1 (3rd)