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Win32/Winwebsec is a Trojan horse that is delivered via a fake YouTube link that entices users to download and install a rogue security Trojan. The Winwebsec page may contain a message like "I can't upload this to YouTube as it will get deleted. Click the link on the right to watch."

The malicious page will then prompt a user to download a fake video codec and install the Trojan horse. Once installed the user will see fake security and virus infection warnings.

See also smitfraud.
See also Rogue Anti-Virus Software Explained in the Did You Know...? section of Webopedia.

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