18 - Zombie Lockbox

Some zombies use a lock box with a not so complicated authentication system to hide their food (brains) from unwanted thieves. Since non-infested brains are rare these days, you desperately need one for your local science team for dissection, so they can continue working on some sort of cure again. So, are you able to open one of these rare lockboxes? SSH: ctf.fluxfingers.net PORT: 1234 USER: ctf PASS: LkxiPPsxYzzsxf
 

credits: 200 +3 (1st), +2 (2nd), +1 (3rd)