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


Risk Level 2: Low

July 29, 2004
February 13, 2007 12:25:56 PM
Systems Affected:

W32.Mydoom.N@mm is a variant of W32.Mydoom.M@mm. It is a mass-mailing worm that drops and executes a backdoor that is detected as Backdoor.Zincite.A, which listens on TCP port 1034.

The worm uses its own SMTP engine to send itself to email addresses that it finds on the infected computer. The email contains a spoofed From address. The subject and body text will vary, as will the name of the attachment.

This threat is packed using ASPack.

Antivirus Protection Dates

  • Initial Rapid Release version July 29, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version July 29, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date August 4, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Yana Liu

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