1. Symantec/
  2. Security Response/
  3. W32.Mytob.CQ@mm


Risk Level 2: Low

May 24, 2005
February 13, 2007 12:39:17 PM
Also Known As:
Net-Worm.Win32.Mytob.x [Kasper, W32/Mytob.gen@MM [McAfee], W32/Mytob-AM [Sophos], WORM_MYTOB.EX [Trend Micro]
Systems Affected:

W32.Mytob.CQ@mm is a mass-mailing worm that has back door capabilities and uses its own SMTP engine to send an email to addresses that it gathers from the compromised computer. The worm spreads through the network by exploiting the Microsoft Windows Local Security Authority Service Remote Buffer Overflow (as described in Microsoft Security Bulletin MS04-011).

Antivirus Protection Dates

  • Initial Rapid Release version May 24, 2005
  • Latest Rapid Release version November 9, 2017 revision 033
  • Initial Daily Certified version May 24, 2005
  • Latest Daily Certified version November 10, 2017 revision 004
  • Initial Weekly Certified release date May 24, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Ka Chun Leung

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2016 Internet Security Threat Report, Volume 21
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