Actually, it seems that my laptop was infected by a trojan which read the memory allocated by wow.exe in order to find the password. I'm still running some scans, it seems though that my main pc is clean. The real awkward thing is that the hacker left my 62 lock in one piece while sodomizing my 51lvl warrior... weird stuff
Anyway Blizzard support was very helpful and to my surprise I got all my gear, enchants, money back in a couple of hours via in-game mail attachments! Now that's a good way to get some epics!
