Researchers at the Microsoft Malware Protection Center (MMPC) discovered a couple of malicious programs making the rounds on torrent and file sharing sites. Social engineers are disguising their malware by labeling it as the beta-versions of unreleased games or upgrades to popular ones. Attackers prey on gamers anxious to test out Defense of the Ancients 2 (a custom scenario map for Warcraft III) and Diablo III, respectively, which aren t slated for release until later in 2012. Fynloski is a backdoor trojan that gains access to nearly all the information and resources within a given computer.
Source: https://threatpost.com/gamers-seek-beta-versions-download-malware-instead-010912/76077/