Ambulance DOS Virus

Ambulance is a non-memory resident parasitic virus.

It searches for .COM files of current directory and directories specified in PATH string, then writes itself to the end of the file.

Depending on the number of infecting files, this virus manifest itself with a video effect – an ambulance with siren from the left end to the right end of the screen.

AntiHeuristica DOS Virus

AntiHeuristica is a non-memory resident encrypted parasitic virus.

It searches for .COM files in the C:\DOS and current directories, then writes itself to the end of the file.

On June 26, it moves all letters on the screen to the top. It contains the text strings:

Virus Anti-Heurística v. 2.0 (c) 1995 Spain.
c:\dos\*.com

CMOSDead DOS Virus