Threat Description

Appder

Details

Aliases: Appder, NTTHNTA, FunYour
Category: Malware
Type:
Platform: W32

Summary



For more information on Word macro viruses, see WordMacro/Concept.

WordMacro/Appder consists of three macros. It also contains a destructive activation routine. After 20 infected files, the virus tries to delete the following files:

   C:\DOC\*.EXE
     C:\DOC\*.COM
     C:\WINDOWS\*.EXE
     C:\WINDOWS\SYSTEM\*.TTF
     C:\WINDOWS\SYSTEM\*.FOT

If the virus succeedes, Windows will not boot after this.

WordMacro/Appder contains this text:

Virus - NTTHNTA

WordMacro/Appder has been reported in the wild during 1997.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.








Description Created: Mikko Hypponen, F-Secure


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