1. Symantec/
  2. Security Response/
  3. W32.Nimda.E@mm


Risk Level 2: Low

October 29, 2001
February 13, 2007 11:37:37 AM
Also Known As:
I-Worm.Nimda.e [Kaspersky], PE_NIMDA.E [Trend], Win32.Nimda.E [Computer Associ, W32/Nimda-D [Sophos], W32/Nimda.E@mm [Frisk], Win32/Nimda.E worm [ESET], W32/Nimda.gen@MM [McAfee]
Worm, Virus
Systems Affected:
Microsoft IIS, Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP
CVE References:
CVE-2001-0154 CVE-2000-0884

W32.Nimda.E@mm is a new version of W32.Nimda.A@mm that contains bug fixes and other modifications, which are designed to prevent antivirus programs from detecting this variant.

For additional information, read the Microsoft TechNet article, "Information on the "Nimda" Worm."

For information on .enc detections, read the article, "What is an .enc detection?"

Antivirus Protection Dates

  • Initial Rapid Release version October 29, 2001
  • Latest Rapid Release version October 12, 2016 revision 023
  • Initial Daily Certified version October 29, 2001
  • Latest Daily Certified version October 13, 2016 revision 004
  • Initial Weekly Certified release date October 29, 2001
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Eric Chien

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2016 Internet Security Threat Report, Volume 21
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