Virus Name: Ienez
V Status: New
Discovered: January, 1995
Symptoms: .EXE file growth; decrease in available free memory;
DOS CHKDSK file allocation errors;
file date/time seconds = "62"
Eff Length: 1,428 - 1,442 Bytes
Type Code: PRhE - Parasitic Resident .EXE Infector
Detection Method: F-Prot, IBMAV, AVTK, Sweep, ViruScan, NAVDX,
VAlert, NAV, PCScan, ChAV,
IBMAV/N, AVTK/N, Sweep/N, NShld, NAV/N, Innoc 4.0+
Removal Instructions: Delete infected files
The Ienez virus was received in January, 1995. Its origin or point
of isolation is unknown. Ienez is a memory resident infector of
When the first Ienez infected program is executed, this virus will
install itself memory resident at the top of system memory but below
the 640K DOS boundary, not moving interrupt 12's return. Available
free memory, as indicated by the DOS 5.0 CHKDSK program, will have
decreased by approximately 1,440 bytes. Interrupts 17 and 21 will
be hooked by the virus in memory.
Once the Ienez virus is memory resident, it will infect .EXE files
when they are executed or opened, but not on copy. Programs
infected by the Ienez virus will have a file length increase of
1,428 to 1,442 bytes, though 1,428 bytes of this file length increase
will be hidden by the virus when it is memory resident. The file's
date and time in the DOS disk directory listing will not be altered.
The virus will be located at the end of infected files. The following
text strings are encrypted within the Ienez viral code:
"IENEZ II 29-9-93 VETO !!!"
"IENEZ II (c) DEATHMAN 1993"
The DOS CHKDSK program will indicate file allocation errors on
Ienez infected programs, except those which increased in size by
It is unknown what the Ienez virus does besides replicate.