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Scareware tries to trick marks into dropping defences

Strip for me, baby

SANS - Survey on application security programs

Virus authors have developed a strain of malware that attempts to con users into uninstalling legitimate security packages.

A rogue package called AnVi Antivirus generates a cheeky pop-up message suggesting that legitimate apps are “uncertified" and ought to be removed. Failure to take action would result in drastically degraded computer performance, marks are disingenuously warned.

Many malware packages, including the Conficker worm, are designed to silently disable anti-virus software and security updates on infected machines. The AnVi Antivirus rogue differs because it uses social engineering techniques in an attempt to trick users into uninstalling security packages.

The rogue will also attempt to remove legitimate packages from the likes of Microsoft, AVG, Zone Labs and Norton even if users fail to comply with the bogus request to uninstall pukka security software. Such an approach, of course, ought to be blocked if the security packages are doing their job.

But on machines with outdated security definition files the attack may work.

If successful, AnVi Antivirus will download fake anti-virus software that warns of multiple imaginary security threats in a bid to trick victims into purchasing worse-than-useless crapware.

A write-up of the threat - complete with screenshots - can be found in a blog post by Symantec here. ®

Bootnote

As with many plausible cons the approach followed by AnVi Antivirus harbors a grain of truth. Legitimate anti-virus packages, by their nature, rely on low-level access to machines on which they run and do not play well together with other anti-virus packages on the same PC, as explained here.

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