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Storm Worm worst outbreak since 2005

Storm Worm worst outbreak since 2005

Malicious software that was sent out in millions of spam messages over the weekend has now infected about 300,000 computers, making it the worst malware outbreak since 2005 .

The so called Storm Worm e-mail messages started appearing last Wednesday, trumpeting attached news reports on topics like "230 Dead as storm batters Europe," or "U.S. Secretary of Sate Condoleeza Rice has kicked German Chancellor."

The attachments have names such as "Full Story.exe" or "Full Video.exe." Once they are launched, these files install malicious software that waits to receive further instructions over the Internet.

The last time malicious software spread this quickly was in May 2005, when the Sober.O mass-mailling worm affected a similar number of systems, says Patrick Martin, senior product manager with Symantec Security Response. "Over the weekend it really kicked into high gear," he says

This week new versions of the worm include similarly provocative news headlines and malicious attachments, but the criminals have added a twist over the past few days: the text of the e-mail messages now contains glowing reviews of penny stocks, apparently designed to fuel "pump and dump" stock scams.

Some of the e-mail messages have also been changed to prey on the romantic, security vendor F-Secure warned. Recent versions of these Trojan e-mails have contained subject lines such as "A Bouquet of Love," "A Day in Bed Coupon," or "A Monkey Rose for You."

The malware is not actually a worm, however, and infected PCs do not immediately start spreading the software to other computers. Instead, Storm has been spreading more rapidly over the past few days as its creators have pumped out more and more malicious e-mail messages.


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