Virus Database

Joker01

Description Joker01

It is not a dangerous memory resident parasitic virus. It traces INT 21h, then hooks INT 9, 1Ch and 21h and writes itself to the end of COM and EXE files, while infecting EXE files the virus converts them to COM format. At the end of the infected files there is the text string:
JOKER-01

This virus is a combination of different viruses: "Cascade" - infecting the system memory, "VACSINA" - infecting EXE files, "Yankee" - handling INT 21h, and of the program-joke "FACE.COM" that is the origin of the virus' video-effects. As a result, this virus has fairly large size - about 30 Kb.
When any file is infected, the virus sets INT 9 (keyboard) and starts its internal counter. The counter decrements its value by 1 on every keystroke. When that counter reaches zero, a funny face appears on the screen.

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Lhb.1989

Description Lhb.1989

It is not a dangerous memory resident parasitic virus. It hooks INT 21h and on DOS calls FindFirst/Next FCB it searches for .COM and .EXE files and writes itself to the end of the file. File C:COMMAND.COM is infected when any infected file is executed. Depending on its internal counter this virus also hooks INT 1Ch and displays the messages:
Bloody! June 4th Made in Chengdun
It's close to midnight and something,evil's lurking in the dark.Under the
moonlight you see a sight,that almost stops your heart.You try to scream
but terror,takes the sound before you make it.You start to freeze as horror
looks.You right between the eyes,you're paralyzed.Cause this is
thriller,thriller night,and no one's gonna save you from the beast about to
strike.You know it's thriller night.You're fighting for your
life!all(LHB)?!

Li-Jian.631

Description Li-Jian.631

It is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the end of EXE files that are executed. The virus does not manifest itself in any way, it contains the text string:
( C ) Copyright Li Jian

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