1. Symantec/
  2. Security Response/
  3. W32.Mydoom.J@mm


Risk Level 2: Low

April 20, 2004
February 13, 2007 12:55:55 PM
Also Known As:
WORM_MYDOOM.J [Trend], Win32.Mydoom.J [Computer Assoc, W32/Mydoom.j@MM [McAfee]
Systems Affected:

W32.Mydoom.J@mm is an encrypted, mass-mailing worm that arrives as an attachment with either a .pif, .scr, .exe, .cmd, .bat, or .zip extension. The worm also contains keylogging capabilities.

Unlike previous Mydoom variants, W32.Mydoom.J@mm does not appear to act as a backdoor, and it is similar in functionality to W32.Mydoom.A@mm.

This threat is written in C++ and is packed with UPX.

Antivirus Protection Dates

  • Initial Rapid Release version April 20, 2004
  • Latest Rapid Release version March 19, 2017 revision 023
  • Initial Daily Certified version April 20, 2004
  • Latest Daily Certified version March 20, 2017 revision 003
  • Initial Weekly Certified release date April 20, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

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