It might just be a coincidence and will not improve your situation, but there was a discussion today
https://bt.irlbtc.com/view/113654.40and then someone found this
http://82.130.102.160/Probably because of the name "BitThief", people started speculating over the purpose of this program so I posted a link to your members page at the ethz to point out that this programm is not related to bitcoins. A few minutes later I replaced the link with the following
http://bitthief.ethz.ch/This happened about an hour before the transaction of your funds. As I said before, this might be a coincidence but I am really sorry if I have drawn attention to you and your funds.
Downloaded, ran in a sandbox, no processes spawned except for BitThief itself, which is a purely leeching torrent client. Stupid and pointless, but not a wallet stealer.
Running in ANUBIS to see if I missed something locally. And here's something to cheer you up.

UPDATE:
Yeah, BitThief does jack shit with bitcoins. The only similarity it shares is that it's P2P