::Trend Micro Threat Resource Center::

15 October 2009

Fake Anti-Virus Programs Hijacking Computers

Cyber criminals are becoming more aggressive in attempting to sell fake anti-virus programs known as rogueware. In addition they are now combining rogueware with ransomware, hijacking users' computers and making them useless until victims purchase fake anti-virus programs, according to a new report by PandaLabs.

The fake program that PandaLabs detected, called Total Security 2009, is being offered to victims for about $120. Victims can also buy "premium" tech support services for an additional $29. Users who pay the ransom receive a serial number that releases all files and executables, allowing them to work normally and recover their information.

The fake anti-virus, however remains on their systems. PandaLabs has published a list of serial numbers that victims can use to unlock their computers, along with a video explaining how the scam operates.

Previously, when computers were infected by this type of malware, users would usually see a series of warnings prompting them to buy a paid version of the programs. The new method of selling rogueware blocks users' attempts to run programs or open documents, falsely displaying a message informing them that all files on their computers are infected and the only solution is to buy fake anti-virus.

"Users are often infected unknowingly - in most cases through visiting hacked Web sites. Once a computer is infected, it is extremely difficult to eliminate the threat, even for those with a certain degree of technical knowledge," said Luis Corrons, technical director of PandaLabs.

"Users are also prevented from using any type of detection or disinfection tool, as all programs are blocked. The only application that can be used is the Internet browser, conveniently allowing the victim to pay for the fake anti-virus. For this reason, on the PandaLabs blog, we have published the serial numbers required to unblock the computer if it has been hijacked. Users can then install genuine security software to scan the computer in-depth and eliminate all traces of this fake anti-virus."