Virus Database

1stVir.3173

Description 1stVir.3173

This is harmless, memory resident parasitic virus. It hooks INT 9, 13h, 1Ch, 21h, and 28h. The virus writes itself to the end of COM and EXE files. When the file is executed, the virus stores its name, and infects that file on INT 1Ch or INT 28h calls. So the virus infects the file not at the same moment when the file is executed, but with some delay.
Other interrupt vectors the virus uses in its video effect: the virus changes the video mode, pages, cursor and mouse position, and displays the string "1st".
The virus contains the encrypted text strings:
EXECOM
1stVIR

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Malign Family

Description Malign Family

These are not dangerous memory resident parasitic viruses. They hook INT 21h and when the DOS functions GetDisk or SetDisk are executed the viruses search for the COM-files and write themselves at their beginnings. Sometimes they display the string: "Malign". On read/write error the virus "Malign.630" displays also: "Wait".

Malmsey.495.a

Description Malmsey.495.a

This is a dangerous, non memory-resident parasitic virus. It searches for EXE files and writes itself to their ends. Sometimes it infects the files incorrectly and they hang up upon execution. It contains the internal texts:
LM
Malmsey Habitat v. 2.0 Lucifer Messiah -- ANARKICK SYSTEMS 07-18-92
Happy Birthday Pob!!

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