- July 26, 2004
- 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]
- 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.
- 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 April 29, 2015 revision 024
Initial Daily Certified version July 26, 2004
Latest Daily Certified version April 29, 2015 revision 041
Initial Weekly Certified release date July 26, 2004
Click for a more detailed description of Rapid Release and Daily Certified virus definitions.
Wild Level: Low
Number of Infections: More than 1000
Number of Sites: More than 10
Geographical Distribution: Low
Threat Containment: Easy
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: John Canavan