W32/Badtrans.B@mm

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W32/Badtrans.B@mm Destructivity: Spreading: Overall risk:
  
• Detected by virus detection files published: 11/24/2001 • Type: Worm
• Virus characteristics first published: 11/24/2001 • Spreading mechanism: Email
• Virus characteristics latest update: 12/18/2003 • Overall risk: Low
• Alias: • Payload: Backdoor functionality
• Infection type: Microsoft Windows 95/98/98 SE/ME/NT 4/2000/XP/2003/Vista  

Virus type Spreading
mechanism
Destructivity
and payload
Additional
descriptions
Detection
and removal
This worm, similar to the recent W32/Aliz and W32/Nimda worms, uses a special trick to execute even if a mail is just opened or previewed in Outlook/Outlook Express.

This is accomplished using a known security hole "Incorrect MIME Header Can Cause IE to Execute E-mail Attachment".

Information and patch is available from:
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS01-020.asp


The security hole is a known issue with Internet Explorer versions 5.01 and 5.5 without SP2 . Users who have this configuration should apply the available patch.
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