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The Dark Apocalypse - Virus for MS-DOS by Crypt Keeper

Virus for MS-DOS

Crypt Keeper
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Author's notes

Parasitic Non-Resident .COM and .EXE infector. Activation : Monday 16th (Fri 13, Sat 14, Sun 15, ...)

This virus is a parasitic infector of .COM and .EXE files and is traversal (infects more than the directory it is in) using the "CD .." method. It infects files by appending to the end. It triggers on any Monday 16th, replacing the boot sector with code to reboot the machine. COMMAND.COM is never infected.

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