Details
DST

These are harmless memory resident parasitic viruses. They hook INT 21h and write themselves to the end of COM-files that are executed. They do not manifest itself in any way. These viruses store original INT 21h address to the address of INT 4Bh, and use INT 4Bh call while infecting the files.

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This entry was posted on Sunday, October 1st, 2006 at 12:00 am and is filed under Virus Threats.