W32.Nimda.E@mm

Risk Level 2: Low

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Discovered:: October 29, 2001
Updated:: 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]
Type:: 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 April 30, 2012 revision 007
Initial Daily Certified version October 29, 2001
Latest Daily Certified version April 30, 2012 revision 017
Initial Weekly Certified release date October 29, 2001

Click 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: High
Threat Containment: Moderate
Removal: Moderate

Damage

Damage Level: Medium

Distribution

Distribution Level: High

Writeup By: Eric Chien

Technical Details

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Internet Security Threat Report, Volume 16