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  3. W32.Mydoom.M@mm

W32.Mydoom.M@mm

Risk Level 2: Low

Discovered:
July 26, 2004
Updated:
February 13, 2007 12:25:43 PM
Also Known As:
W32/Mydoom.o@MM [McAfee], W32/MyDoom-O [Sophos], WORM_MYDOOM.M [Trend Micro], Win32.Mydoom.O [Computer Assoc, I-Worm.Mydoom.m [Kaspersky], W32/Mydoom.N.worm [Panda]
Type:
Worm
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP


W32.Mydoom.M@mm is a mass-mailing worm that drops and executes a backdoor, detected as Backdoor.Zincite.A, that listens on TCP port 1034. The worm uses its own SMTP engine to send itself to email addresses it finds on the infected computer.

The email contains a spoofed From address, and the Subject and Body text will vary. The attachment name will also vary.

Note:
  • Symantec Consumer and Enterprise products that support Worm Blocking functionality automatically detect this threat as it attempts to spread.
  • Due to a decreased rate of submissions, Symantec Security Response has downgraded W32.Mydoom.M@mm from a Category 4 to a Category 3 as of July 28, 2004.
  • Due to a decreased rate of submissions, Symantec Security Response has downgraded W32.Mydoom.M@mm from a Category 3 to a Category 2 as of October 27, 2004.

W32.Mydoom.M@mm is packed with UPX.



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Antivirus Protection Dates

  • Initial Rapid Release version July 26, 2004
  • Latest Rapid Release version December 30, 2013 revision 036
  • Initial Daily Certified version July 26, 2004
  • Latest Daily Certified version December 31, 2013 revision 001
  • Initial Weekly Certified release date July 26, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

  • Wild Level: Low
  • Number of Infections: More than 1000
  • Number of Sites: More than 10
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Moderate

Damage

  • Damage Level: Medium

Distribution

  • Distribution Level: High
Writeup By: John Canavan

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