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


Risk Level 2: Low

February 28, 2005
February 13, 2007 12:34:20 PM
Also Known As:
Win32.Mytob.A [Computer Associ, Mytob.A [F-Secure], Net-Worm.Win32.Mytob.a [Kasper, W32/Mydoom.bg@MM [McAfee], W32/Mytob-A [Sophos], WORM_MYTOB.A [Trend Micro]
Systems Affected:

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

Antivirus Protection Dates

  • Initial Rapid Release version February 28, 2005
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version February 28, 2005
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date March 2, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Asuka Yamamoto

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