Jara.404
Description Jara.404
It is a not dangerous nonmemory resident parasitic virus. It searches for .COM files and writes itself to the end of the file. It displays the message:
I'm a very dangerous virus made by Jara Cimrman.~Some people don't like
HALT(0) in Pascal programms~
Check other viruses! Be aware! Use Antiviral Software
Simbioz.331
Description Simbioz.331
It is a harmless nonmemory resident parasitic virus. It searches for .COM files in the current directory, then writes itself to the end of the file. The virus writes CALL_Virus instruction to the middle of the file. To do that it scans the file for the B4h ?? CDh 21h bytes (MOV AH,?? ; INT 21h call) and replaces these bytes with CALL_Virus code. Before return to the host program the virus restores these bytes.
The virus does not manifest itself in any way. It contains the text strings:
*.com [Simbioz.Inside]
Simple
Description Simple
It is a harmless nonmemory resident parasitic virus. It searches for C:COMMAND.COM and the .COM files of the current directory and writes itself to the end of the file. It contains the text strings:
SIMPLE 1992 (c)
*.COM
C:COMMAND.COM
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