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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Encyclopedia GetVirusCard True 0

Class.H

 
Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Class.H
Technical name:W97M/Class.H
Threat level:Low
Type:Virus
Effects:  It modifies Word documents, minimizes the Word window before it is closed and displays messages on screen.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

Detection updated on:Nov. 13, 2002
StatisticsNo
Family:VALENTIN

Brief Description 

    

Class.H is a macro virus that infects Word files and the NORMAL.DOT  global template used by this application.

The effects of Class.H vary depending on a number that the virus generates at random. If the number generated is 49, it displays a message on screen: Gerbil by virus.

Class.H is also a polymorphic virus, which makes it more difficult to detect than normal macro viruses.

Visible Symptoms 

    

Class.H is sometimes easy to recognize. For example on November 13, it maximizes or minimizes the active document window before closing Word.

 

On other occasions Class.H  displays the following message on the screen: Gerbil by virus.