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


Risk Level 2: Low

April 9, 2005
February 13, 2007 12:36:41 PM
Also Known As:
Win32.Mytob.{AF, AL, BH-BJ, BQ, BT, CA, CB, DH, DP, EH} [Computer Associates], Net-Worm.Win32.Mytob.{h, i, m, t, x, ai, gen} [Kaspersky Lab], W32/Mytob.{h, m, t, ag, aw, gen}@MM [McAfee], W32/Mytob-{E, F, I, N, AH, AK, AO, BW, BX, Fam} [Sophos], WORM_MYTOB.{AD, AJ, AQ, BF, BJ, BT, BW, BX, BZ, CB, CL, EY, EZ} [Trend Micro]
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Mytob.AH@mm is a mass-mailing worm that uses its own SMTP engine to send an email to addresses that it gathers from the compromised computer.
The worm spreads by exploiting the DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026) and the Microsoft Windows Local Security Authority Service Remote Buffer Overflow (described in Microsoft Security Bulletin MS04-011).

Antivirus Protection Dates

  • Initial Rapid Release version April 10, 2005
  • Latest Rapid Release version October 1, 2016 revision 005
  • Initial Daily Certified version April 10, 2005
  • Latest Daily Certified version October 2, 2016 revision 001
  • Initial Weekly Certified release date April 13, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Hatsuho Honda

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STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
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