W32.Nimda.R

Risk Level 1: Very Low

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Discovered:: June 17, 2003
Updated:: February 13, 2007 12:02:40 PM
Also Known As:: PE_NIMDA.L [Trend], I-Worm.Nimda.h [KAV]
Type:: Virus
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

W32.Nimda.R is a limited version of W32.Nimda.A@mm. This variant infects Portable Executable (PE) files and creates network shares for all the drives. Further, the virus adds the user Guest under the groups, Guests and Administrators. This gives the guest account Administrative privileges.

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

Antivirus Protection Dates

Initial Rapid Release version June 17, 2003
Latest Rapid Release version June 17, 2003
Initial Daily Certified version June 17, 2003
Latest Daily Certified version June 17, 2003
Initial Weekly Certified release date June 17, 2003

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Moderate

Damage

Damage Level: Medium

Distribution

Distribution Level: Low

Writeup By: Robert X Wang

Technical Details

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Internet Security Threat Report, Volume 16