ChDir.422
Description ChDir.422
These are memory resident dangerous viruses. They hook INT 21h and on calls to ChangeDir (AH=3Bh) DOS function they search for .COM- and .EXE-files and overwrite block of code in the file middle. The infected files are not recoverable.
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Cowboy.2483
Description Cowboy.2483
It is a very dangerous nonmemory resident parasitic virus. It searches for COM and EXE files, then writes itself to the end of the file. The virus does not infect the anti-virus programs and utilities: IBM*.*, NAV*.*, SCAN*.*, CLEAN*.*, F-PROT*.*, V*.*, FINDVIRU.*.
In February, on Thursday at 9:xx, 10:xx, 15:xx the virus erases the disk C: sectors. The virus contains the text string:
IBMNAVSCANCLEANF-PROTVFINDVIRU
*.* *.com *.exe
Have you ever danced with the devil under the pale moon light?
This program was written in the state of Texas(C) 1994-95 Dark Cow-boy
CPSU.2535
Description CPSU.2535
It's a memory resident not dangerous virus. It hooks INT 21h and infects by a standard manner COM- and EXE-files. It displays the old soviet communist slogan.
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