Blizzard has issued a warning that its Battle.net two-step authenticator protection is useless against a malware program that can hijack player accounts even if they're using an authenticator. The Trojan gets passed the two-step protection by stealing both the account information and the authenticator password at the time the player enters them, a Blizzard representative said. Ordinarily, players would obtain a one-time-use authenticator password from a keychain dongle that spits out a new six-digit code on an LCD display when users push a button. Blizzard also offers a mobile authenticator app that serves the same purpose. Blizzard said users can see if their PCs are infected with the malware by creating an MSInfo file and then looking in the Startup Program section of that file for either "Disker" or "Disker64." As yet, Blizzard has been unable to confirm an anti-virus solution that will remove the program short of reformatting the system. While the company isn't certain how the malware found its way onto users' PCs yet, one common thread is that users reporting problems had recently downloaded addons for World of Warcraft.