Virus Name: Iranian
V Status: Rare
Discovered: January, 1993
Symptoms: .COM & .EXE growth; decrease in total system & available free
Eff Length: 1,320 Bytes
Type Code: PRhAK - Parasitic Resident .COM & .EXE Infector
Detection Method: ViruScan, F-Prot, AVTK, IBMAV, Sweep, NAV,
NAVDX, VAlert, PCScan, ChAV,
NShld, AVTK/N, Sweep/N, NAV/N, IBMAV/N, Innoc
Removal Instructions: Delete infected files
The Iranian virus was submitted in January, 1993. Its origin or
point of isolation is unknown. Iranian is a memory resident infector
of .COM and .EXE programs, including COMMAND.COM.
When the first Iranian infected program is executed, the Iranian
virus will install itself memory resident at the top of system
memory but below the 640K DOS boundary, hooking interrupts 09 and
21. Total system and available free memory, as indicated by the
DOS CHKDSK program, will have decreased by 1,328 bytes. Interrupt
12's return will not be moved.
Once the Iranian virus is memory resident, it will infect .COM and
.EXE programs, including COMMAND.COM, when they are executed.
Infected programs will have a file length increase of 1,320 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 encrypted within the Iranian virus'
code and are thus not visible within infected programs:
"IRANIAN VIRUS W.by ABBAS KUHKAN ALIABADI"
"ANTI VIRUS Writen By ABBAS KUKAN"
It is unknown what Iranian does besides replicate.