1. Symantec/
  2. Security Response/
  3. W32.Zezer.Worm


Risk Level 1: Very Low

October 1, 2003
February 13, 2007 12:08:18 PM
Also Known As:
W32/Zezer.worm.gen [Mcafee], I-Worm.Zezer [AVP]
Systems Affected:

W32.Zezer.Worm is a worm that sends itself by email to all the Hotmail addresses that it finds on your MSN Messenger contact list.

It steals cached network passwords and can terminate the processes of some security software.

The worm is written in Microsoft Visual Basic 6 and is packed with UPX. The Mswinsck.ocx file must be on the computer for the worm to run.

Antivirus Protection Dates

  • Initial Rapid Release version October 1, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version October 1, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date October 2, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Kaoru Hayashi

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2016 Internet Security Threat Report, Volume 21
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