Tula.1656
Description Tula.1656
This is a memory-resident parasitic virus. It decreases the DOS memory size (the word at address 0000:0413) and hooks INT 8, 13h, 21h. This virus writes itself to the end of the files that are executed. The virus infects only COM files, or both COM and EXE depending on the virus version.
When each 50th file is executing the virus plays a tune.
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Donbass.803
Description Donbass.803
This is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the end of EXE files that are accessed. The virus contains the text strings:
(c) Black Jack 97, Ver 1.0
+------------------------------+
| (c) Black Jack 97, Ver 1.0 |
| +à-"Ç-- - L--ái |
+------------------------------+
Doom.442
Description Doom.442
This is a very dangerous memory-resident encrypted parasitic virus. It hooks INT 21, and INT 08h or 1Ch. It writes itself to the end of COM and EXE files. It erases random sectors of the hard disk. Periodically the virus reboots the computer. It also contains the following texts:
COMMAND.COM
DOOM II (c) Dr.Jones, NCUall
|