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.
Disinfection & Removal
Description Created: Mikko Hypponen, F-Secure