Virus Database

Zombie.3592

Description Zombie.3592

This is a dangerous non memory-resident polymorphic parasitic virus. It searches for COM files, then writes itself to the end of the file. It does not infects files with the names:
COMMAND*.*,AIDS*.*,DRWEB*.*,WEB*.*,ADINF*.*,AVP*.*,EMM386*.*
As well as files that have length divisible by 100.
While infecting the virus appends to the end of file from 0 to 127 random bytes. The virus encrypts original bytes of file by random key. To restore original bytes the virus calculates this key, but fails in about 10% of cases.
The virus has a routine erasing CMOS memory and displaying a message, but this subroutine never takes control. This text message uses as a key and use to decrypt original host file bytes, but in some cases it is patched by the virus.

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Slug.872

Description Slug.872

It is a dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM files that are executed. The virus does not changes file header and entry point - it traces the file and writes its JMP_Virus code into the middle of the file. Depending on the system timer the virus displays:
Removing virus from memoryall

and halts the system. The virus also contains the string:
TheBugger virus by The Slug/29A

Slugger.288

Description Slugger.288

It is a very dangerous nonmemory resident parasitic virus. It searches for .COM files and overwrites them. It displays the text strings:
Runtime error 202 at 0000:0000
SLUGGER!

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