Virus Name: Antigus
V Status: New
Discovery: January, 1996
Symptoms: .EXE file growth; file date/time changes;
decrease in available free memory
Eff Length: 1,570 - 1,584 Bytes
Type Code: PRhE - Parasitic Resident .EXE Infector
Detection Method: ViruScan, IBMAV, AVTK, NAV, NAVDX, F-Prot, ChAV,
IBMAV/N, NShld, NAV/N, AVTK/N, Innoc
Removal Instructions: Delete infected files
The Antigus virus was received in January, 1996. It appears to be
from Malaysia. Antigus is a memory resident infector of .EXE files.
When the first Antigus 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 CHKDSK program from
DOS 5.0, will have decreased by 3,184 bytes. Interrupts 08 and 21
will be hooked by the virus in memory.
Once the Antigus virus is memory resident, it will infect .EXE
files when they are executed. Infected files will have a file length
increase of 1,570 to 1,584 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 have been updated to the current system
date and time when infection occurred. The following text strings
are encrypted within the viral code:
"Happy birthday to me!"
"E-VIRUS II aka Anti-GUS.12th December 1994.KL,Malaysia"
"TM was here!"
It is unknown what the Antigus virus does besides replicate.