ABC.2378
Description ABC.2378
It is very dangerous memory resident virus. It infects COM- and EXE-files while DOS accesses them. The virus manifests itself from 13th of every month: it checks keyboard and after double pressing of any key duplicates this key (for example the keyboard input "1001" is transferred to "10001"). The infector writes a small program into files that tries to erase the FAT of all hard disks after starting. The virus hooks INT 16h, 1Ch, 21h.
The virus uses very powerful algorithm of en/decryption. The en/decryptor contains much of the assembler commands ADD, SUB, XOR in random order.
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Donbass.444
Description Donbass.444
This is a harmless non memory-resident encrypted parasitic virus. It searches for the COMMAND.COM file, then for COM files of the current directory, then writes itself to the end of the file. The virus contains the text string:
Donbass3 COMSPEC= *.COM
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 |
+------------------------------+
|