Virus Database

Dof.983

Description Dof.983

These are very dangerous memory resident encrypted parasitic viruses. They hook INT 21h and write themselves to the end of .COM files (except COMMAND.COM) that are executed or accessed by FindFirst/Next DOS functions. The virus have bugs and often corrupt files while infecting them. Depending on the system time they overwrite files with the text:
"Dof.983": RAVEL - BOLERO
"Dof.962,1000.b": RAVEL - Carmen
"Dof.1000.a": divide overflow
"Dof.1294": Divide Overflow

The viruses also contain the texts:
"Dof.1000.b": BUCURESTI 1994.

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Before.2915

Description Before.2915

It is not a dangerous memory resident parasitic virus. The virus was written in Assembler and its actual code is 1164 bytes, but after that virus author compressed it with AIN executable files compressor, and result virus code (compressed actual virus code and decompression routine) grows up to 2915 bytes.
The virus hooks INT 21h and writes itself to the beginning of COM and EXE files that are executed. The virus does not infect the files: CO*, WI*, EM*, SH*, GD* (COMMAND, WIN, EMM386, all). Depending on the system time and video mode the virus disables executing files (does not allow to start games?). The virus contains the text strings:
COWIEMSHGD
BEFORE.CE.1136 (C) PC Soft Club

Bel.2124

Description Bel.2124

It is a very dangerous memory resident parasitic polymorphic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed or opened. The virus checks file names and does not infect files: CO*, DR*, WE*, AI*, AD*, VB*, AV*, HI*, CH*, CC*. Depending on the system date the virus deletes files with extensions: .CFG, .TIC, .PAC, .PAK, .SAV, .WAD and some other.
The virus contains the text strings:
* reBEL.P1 * üâô (Belarus).
Hi, Mr. Kolyada!

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