SI.509
Description SI.509
It is a dangerous memory resident parasitic virus. It hooks INT 1Ch, 21h, intercepts DOS calls Create/Remove/Change Directory, Create/Open File and on these calls search for .COM files in the current directory, then writes itself to the end of the file.
To detect its TSR copy the virus writes ID-word "SI" to the BIOS data area at the address 0:0472 (Warm boot flag). At 10:00 the virus reboots the computer. The virus contains the text:
*.COM
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Karin.1134
Description Karin.1134
This is a dangerous nonmemory resident parasitic virus. It searches for .COM files, then writes itself to the beginning of the file. The infected files contain the text "REDSTAR *.COM" at the beginning. On October, 23th this virus displays:
Karin hat GEBURTSTAG!
and halts the computer.
Karina.850
Description Karina.850
It is not a dangerous nonmemory resident parasitic virus. It searches for COM files, then writes itself to the end of the file. On September 23th it displays the text:
_____ _____ _____ ______ ______ ______ _____ __ __ ___ __
__ __ __ __ __ __ __ __ __ __ __ ____ __
_____ ___ ___ _____ __ ______ __ _____ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __ __ ____
______ _____ ______ ______ __ ______ ______ _____ __ ___
The virus also contains the string:
KarinaB
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