Wow.VM is a Trojan that steals confidential information related to certain online games such as World of Warcraft.

Then, it sends the gathered information to certain websites, so that its creator can access it.

Wow.VM does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.

Technical details can be found at this Panda Software page.