A Trojan horse program that appears to be a Microsoft Corp. security update can download malicious code from a remote Web site and install a back door on the compromised computer, leaving it vulnerable to remote control. IDefense Inc., a Reston, Va., computer security company, said the malicious code is the latest example of so-called social engineering to fool Windows users. It is similar to the W32Swen worm, which last year passed itself off as a Microsoft patch. “The success of Swen in 2003 encouraged virus writers to put effort into creating official-looking e-mails and Web sites,” said Ken Dunham, director of malicious code for iDefense. The Trojan arrives as an attachment to an e-mail that appears to be from [email protected]. The subject line says, “Windows XP Service Pack (Express)—Critical Update.” Full Story
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