Analise writes "The Register reports on the first trojan using Sony's DRM rootkit. A newly discovered variant of the Breplibot trojan makes use of the way Sony's rootkit masks files whose filenames begin with '$sys$'. This means that any files renamed this way by the trojan are effectively invisible to the average user. The malware is distributed via an email supposedly from a reputable business magazing requesting that the businessperson verify his/her attached 'picture' to be used for an upcoming issue. Once the payload is executed, the trojan then installs an IRC backdoor on affected Windows systems."