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Fingers

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Virus.DOS.Fingers.1322 is a memory resident parasitic virus on DOS, it activates by tracking keyboard activity.

BehaviorEdit

After the virus has been loaded into memory, the virus hooks INT 21h to infects any executable file that is run. The infection size varies between different files.

The virus also hooks INT 9 in order to trigger the payload.

Memory usageEdit

The exact memory usage is 1,600 bytes.

PayloadEdit

After 3000 key presses the virus displays a message:

CRITICAL ERROR 08/15: TOO MANY FINGERS ON KEYBOARD ERROR

And then it hangs the system and disables the keyboard input.

Other detailsEdit

This virus would be detected and infected by another virus called SSR, as long as SSR is in memory.

The virus contains the internal text string:

COMMAND.COM

VideosEdit

Virus.DOS03:08

Virus.DOS.Fingers

Fingers virus review by danooct1

Virus.DOS.Fingers01:01

Virus.DOS.Fingers.1322

Fingers virus review by Alles Sandro

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