Virus Name: Massacre
V Status: New
Discovered: July, 1996
Symptoms: .COM & .EXE growth;
interrupts 21 & 2F hooked in available free memory
Eff Length: 775 Bytes
Type Code: PRfA - Parasitic Resident .COM & EXE Infector
Detection Method: F-Prot, AVTK, IBMAV, ViruScan, NAV, NAVDX, ChAV,
Innoc, AVTK/N, IBMAV/N, NShld, NAV/N
Removal Instructions: Delete infected files
The Massacre virus was received in July, 1996. Its origin or point
of isolation is unknown. Massacre is a memory resident infector of
.COM and .EXE files, but not COMMAND.COM.
When a program infected with the Massacre virus is executed, this
virus will install itself memory resident in available free
memory, hooking interrupts 21 and 2F. Total system and available
free memory, as indicated by the DOS CHKDSK program from DOS 5.0,
will not be altered.
Once the Massacre virus is memory resident, it will infect .COM
and .EXE files, but not COMMAND.COM, when they are executed or
opened, but not when copied. Infected files will have a file
length increase of 775 bytes with the virus being located at the
end of the file. The program's date and time in the DOS disk
directory listing will not be altered. The following text strings
are visible within the viral code:
"[MIDNIGHT MASSACRE] V1.2 by Crypt Keeper"
It is unknown what this virus may do besides replicate.