Darth.200
Description Darth.200
These are very dangerous memory-resident viruses that infect .COM-files while writing to them (INT 21h, ah=40h). The viruses write themselves at the files beginning, not saving the previous contents. These infectors install in the DOS segment, substitute the 40h function address in the interrupt 21h functions table. They also contain the text "Darth Vader".
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Boxes.1086
Description Boxes.1086
It's a not dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself at the end of .COM-files that are executed. Sometimes it hooks INT 1Ch also and manifests itself by a video effect.
Boys.500
Description Boys.500
It is a non memory resident harmless parasitic virus. It infects by standard way .COM-files of current directory. While getting infection the file's attributes sets to READ-ONLY. The virus sets the attribute of some .EXE-files to SYSTEM. It contains the text "The good and the bad boy".
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