Sophos warns of a fake anti-virus products, following the discovery of a malicious Trojan horse that is posing as a free copy of Norton AntiVirus 2008. Google adverts are being presented to internet users who search for "free antivirus", leading them to a professional-looking website that claims to offer an anti-virus product for download.
The website attempts to lure visiting computer users into installing a Trojan horse, Troj/FakeAV-AD, which will then present fake security alerts and urge users to purchase a "full version" of the software.
Sophos has produced a video demonstrating the risk to internet users:
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