Google unregistered antivirus

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In the second month of a campaign against fake security software, Microsoft Corp. Last month, Microsoft trumpeted a similar cleaning operation against another family of bogus security software that it said had purged nearly a million machines of programs such as those called "Advanced Antivirus," "Ultimate Antivirus " and "XPert Antivirus. Windows users increasingly have been plagued with worthless security software as criminals bundle the moneymakers with other malware or seed significant users with waves of spam touting the programs.

Classified by Microsoft as a Trojan horse, Yektel takes advantage of users' worries about browser security by inserting false warnings into Internet Explorer. Those warnings, explained Microsoft researcher Hamish O'Dea in a post to the company's malware protection center blog two weeks ago, appear at random and mimic IE's own legitimate drop-down alerts.

Newer variations of the Yektel Trojan go a step further and insert phony warnings into Google search results, said O'Dea. Whenever these even-sneakier versions detect IE rendering a URL that includes "google," it inserts a fake message that says, "Google has detected unregistered Antivirus copy on your computer. Google recommends you activate Antivirus to protect your PC from malicious intrusions from the Internet.