Danger! One of you may have a worm!
I just got a copy of W32.Sobig.B@mm (an email from support@microsoft.com, with a .pif file as an attachment) in my mailbox. That means somebody who has my email address on their computer somewhere is infected. IT MAY BE YOU. The above link should tell you how to check yourself out and clean it if you have it.
UPDATE: I checked the headers on the message, if I’m reading them right, the worm came from a computer in Korea, at the “KORNET” ISP. (The address is in the range 211.222.246.0 – 211.222.255.255. I don’t want to give the exact address because the computer may be vulnerable now that it is infected.)
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I doubt that it means someone with your email address is infected–I got the same message at six of my seven email addresses, two of which nobody knows and nobody uses.
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I\’m just going by the information at that symantec link. Assuming they\’re right, the virus will seach the infected computer for .wab, .dbx, .htm, .html, .eml, and .txt files, and send itself to any email addresses it finds in those files. So I guess that means the computer that sent the virus to you must have had your address in one of those kinds of files.