Markiz.262
Details
Markiz.2620
This is a dangerous memory resident encrypted parasitic virus. It traces and hooks INT 21h, then it infects COM and EXE files. The virus contains the text strings:
[-DEDiCA+ED-Ï0-MARKiZ-]
This virus writes itself to the beginning of COM files and to the end of EXE files that are accessed with DOS functions FindFirst/Next ASCII (AH=4Eh,4Fh). These functions are performed by DOS while executing a file from the command line, and the virus infects that file at that moment. The virus checks the file name before infecting, and does not infect the file if there are any of the following strings found at the beginning of a file name:
ADIN AID ANT DRW FIND MSA NAV VSA WEB
With a probability of 1/256 while executing the FO?MA*.EX* files (FORMAT.EXE), the virus renames them to *.?d? (’d’ - 229 ASCII).
In February and October, some time after installation, the virus displays messages, and manifests itself with video and sound effects.
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