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Arafat worm exploits new MS vuln

Novel infection technique

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SANS - Survey on application security programs

A worm which exploits curiosity about the death of Yasser Arafat is the first to exploit the known Extended MetaFiles vulnerability.

Aler is a network worm that was widely bulk-mailed with the subject "Latest News about Arafat!!!". These infected emails had two attachments, one a clean JPEG file and the other an infected EMF file, according to anti-virus firm F-Secure.

The EMF file exploits a well-known Windows vulnerability (MS04-032) to install the worm onto systems when the attachment is opened.

Thereafter, Aler spreads across network shares and hosts with weak user passwords. The worm's payload is a connection proxy that allows the attacker to initiate network connections through an infected computer. This feature could be used to send spam or attack other computers.

F-Secure rates Aler - which only infects Windows PCs - as a medium category nuisance. Standard precautions apply - vigilance about unsolicited messages, updating AV protection, use of stronger passwords, tin-foil hats etc. ®

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