Threat Description

Zipper

Details

Aliases: Zipper
Category: Malware
Type: Virus
Platform: DOS

Summary



Zipper contains several bugs which might corrupt the infected files.



Removal



Automatic Disinfection

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

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



Technical Details



This is a simple virus which stays resident in memory and infects COM and EXE files when they are accessed. \COMMAND.COM and \DOS\FORMAT.COM are infected on the first execution.

If you run PKZIPFIX against an infected COM or EXE file, it will create a PKFIXED.ZIP, which contains an assembly source file called ZIPPER.ASM.

The virus contains this text, which is never displayed:

>>*>> Use PKUNZIP *.EXE immediately! <<*<<




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