Virus Database

Pifpaf.760

Description Pifpaf.760

It is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed. It contains the text:
PIF-PAF B v1.0
Nincs kegyelem !

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Intruder Family

Description Intruder Family

These are harmless nonmemory resident parasitic viruses. They search for EXE files of subdirectory trees of all logical disks, then they write themselves to the end of the file. They contain the text string:
*.EXE *.*

"Intruder.1353" contains the string:
Product of Wolters Kluwer Peter Martin.

"Intruder.1413" is a very dangerous virus. Under PRINT.COM device the virus erases the disk sectors, and display:
Anti-Print III virus detonation!

Invader.a

Description Invader.a

This is a dangerous memory resident virus. It infects COM and EXE files (except COMMAND.COM) in the same way as the "Jerusalem" virus does, and affects boot sectors of hard and floppy disks. On a floppy disk it formats an additional track, on the hard disk it writes itself just after the MBR. Depending on its internal counters the virus can execute a dummy cycle after each timer interrupt (INT 8), erase information on disks, tune a melody, decipher and display the following message:
by Invader, Feng Chia U., Warning: Don't run ACAD.EXE!
The virus also contains the text "ACAD.EXECOMMAND.COM.COM.EXE" and hooks INT 8, 9, 13h, 21h.

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