Threat Encyclopedia

Selected viruses, spyware, and other threats: sorted alphabetically

Int40

This is a boot virus. When system is loaded from an infected diskette it infects the hard disk’s MBR. In memory the virus is located in the upper part of the interrupts table. It redirects the INT 40h service to itself. It is calling of ROM BIOS for diskette service by hard disk’s BIOS redirected routine. This virus infects boot sectors of diskettes that are not write protected. It has no other presentations.

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