Virus Database

Backdoor.Win32.Small.fp

Description Backdoor.Win32.Small.fp
This Trojan program provides a remote malicious user with access to the victim machine. The Trojan itself is a Windows PE EXE file approximately 39KB in size. Installation Once launched, the backdoor copies itself to the Windows system directory as "service.exe": %System%configservice.exe Itall

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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.

Joker3.1084

Description Joker3.1084

It is a dangerous memory resident parasitic virus. When executed it copies itself into the system memory, and does not fix MCB list, that might cause system confusion. Then it hooks INT 21h and on several DOS calls it searches for .COM files of the current directory and writes itself to the end of the file. Depending on the system timer the virus decrypts and displays one of the messages:
You have the Joker ]I[ virus by Crypt Keeper [Joker 3]
Please insert tractor-feed toilet paper into printer
Impotence error causing erection at port adress 3E2 IRQ 5
This program requires Microsoft Windows.
Computer hungry : Insert 5-1/4 inch HAMBURGER in drive A:
Missing Light Magenta/Olive ribbon in printer.
Not enough memory.
Packed file corrupt.
Bad command or file name
Bad or missing command interpreter.

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