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IDG News Service - Security experts warned Thursday of a fast-spreading e-mail worm, the first large outbreak of this type in nearly a decade.
The worm appears in e-mail messages with the subject "Here you have," and contains what seems to be a link to an Adobe PDF file. In fact the link takes the victim to a Web page hosted on the members.multimania.co.uk domain that then tries to download a screensaver (.scr) file. If the user agrees to installing that file, he is then infected by the worm, which mails itself to his e-mail contacts.t
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The worm is similar to the ILoveYou and Anna Kournikova worms, which spread in 2000 and 2001, and is a type of malware that has not been a major problem since around 2002, according to David Cowings, a senior manager with Symantec Security Response. "It looks like we've had a resurgence of mass-mailing worms," he said.
In fact, "Here you have" is the same subject line used by the Anna Kournikova worm.
This latest worm seems to do nothing more than send itself out, using the victim's contact list, Cowings said. "It appears to be mailing itself to all of the mailing lists that are in someone's contacts. It may also go to individuals," he said. The worm appeared to be affecting Outlook e-mail users, but it's not clear if it is also affecting users of other mail programs.
The body of the e-mail typically says something like, "Hello... this is the document I told you about, you can find it here." Because the worm is spreading via contact lists, the e-mail often comes from someone the victim knows.
Symantec started blocking the worm at around 10:30 a.m. Pacific Time Thursday and quickly stopped 65,000 messages, according to Cowings. The number soon ballooned beyond that, but the worm may now have a hard time spreading, because the malicious screensaver file on multimania.co.uk appears to have been taken down, Cowings said.
Multimania.co.uk is a free website hosting service run by Lycos.
In an alert sent out to customers Thursday, McAfee recommended blocking .scr files at the Internet gateway. "McAfee has received confirmation that some customers have received large volumes of spam containing a link to malware, a mass-mailing worm identified as VBMania," the note reads. "The symptom reported thus far is that the spam volume is overwhelming the email infrastructure."