We're getting news of a particularly nasty Trojan targeting Windows-based PC today, which anti-virus companies have dubbed "Shamoon." Like most malware, Shamoon exists to steal data from computers connected to the Internet, but what it does afterward is quite evil. In an effort to cover its tracks, it begins deleting files, including the Master Boot Record. This, naturally, leaves the PC unbootable, and can cause some major headaches. The malware itself is a 900KB file that uses many encrypted resources, as you can see below.