W95.Zperm.B

Risk Level 1: Very Low

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Updated:: February 13, 2007 11:53:40 AM
Type:: Worm

The W95.Zperm.B virus is one of the first metamorphic viruses for 32-bit Windows platforms. The virus does not use traditional polymrophic encryption. Rather, it mutates its code by using jump instruction insertion. The complete virus body is permutated including the permutation engine itself. A variant known as W95.Zperm.A is known to exist.

Antivirus Protection Dates

Initial Rapid Release version June 30, 2000
Latest Rapid Release version June 30, 2000
Initial Daily Certified version June 30, 2000
Latest Daily Certified version June 30, 2000
Initial Weekly Certified release date pending

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: Easy

Damage

Damage Level: Low

Distribution

Distribution Level: Low

Technical Details

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Internet Security Threat Report, Volume 16