1. Symantec/
  2. Security Response/
  3. W32.Shoho@mm


Risk Level 2: Low

December 20, 2001
February 13, 2007 11:46:56 AM
Also Known As:
I-Worm.Welyah, W32/Shoho.a@MM, W32/Shoho.b@MM, W32/Shoho.c@MM

W32.Shoho@MM is a mass mailing worm that is written in Visual Basic. It sends itself as the attachment "Readme.txt (many blank spaces) .pif"

This worm also uses the IFRAME vulnerability that allows Microsoft Outlook to execute the attachment automatically. There are three variants of this worm. All are detected as W32.Shoho@mm.

Antivirus Protection Dates

  • Initial Rapid Release version December 21, 2001
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version December 21, 2001
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: JP Duan

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