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Details
Horse.1154.a
There are not dangerous memory resident parasitic viruses. They hook INT 8, 21h and write themselves to the end of COM and EXE files that are executed or closed. While infecting the viruses use the undocumented System File Table. The viruses trace interrupts, periodically manifest themselves by a sound or the video-effects. They contain the text strings like:
Sofia,Jan/Feb 1991 (c) Naughty Hacker.
Sofia,Feb '91 Naughty Hacker. |