Bobby.513
Description Bobby.513
This is a somewhat-dangerous, non-memory resident parasitic virus. It searches for .COM files, then writes itself to the end of the file. Because of a bug, the virus corrupts files with lengths that are divisible by 100h (256). On Fridays, the virus displays a message in Russian. It also contains the text:
Bobby Friday.
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EnolaGay.1183.a
Description EnolaGay.1183.a
It is a harmless memory resident parasitic virus. It hooks INT 21h, 27h, 2Fh and writes itself to the end of COM- and EXE-files that are closed, if they have been opened for writing (while copying, for example). Being installed into the system memory the virus can move its TSR copy and append it to the code of programs that stays TSR by using DOS call Keep (INT 21h, AH=31h, or INT 27h).
The virus contains the internal text strings:
Enola Gay ver.2.01 (C) 1994 by HPR Lab.
Accidents newer happenall
Enter.613
Description Enter.613
It is a dangerous memory resident parasitic virus. It hooks INT 9, 21h and writes itself to the end of EXE files that are accessed. By hooking INT 9 (keyboard) the virus calculates ENTER keystrokes and on the 100th ENTER reboots the computer.
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