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  3. W32.Matcher.Worm


Risk Level 2: Low

April 18, 2001
February 13, 2007 11:36:14 AM

W32.Matcher is an executable that arrives by email. When executed, the worm will email itself to everyone in the Microsoft Outlook Address book. The worm will continue to send emails while the process is running in the background.

Antivirus Protection Dates

  • Initial Rapid Release version April 18, 2001
  • Latest Rapid Release version March 1, 2011 revision 037
  • Initial Daily Certified version April 18, 2001
  • Latest Daily Certified version March 2, 2011 revision 002
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Medium
  • Number of Infections: More than 1000
  • Number of Sites: More than 10
  • Geographical Distribution: High
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low


  • Distribution Level: High
Writeup By: Eric Chien

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