Taiwan 3 Virus
Virus Name: Taiwan 3
Aliases: Anticad 2
V Status: Common
Discovered: June, 1990
Symptoms: .COM & .EXE growth; decrease in available free memory; system
Eff Length: 2,900 Bytes
Type Code: PRA - Parasitic Resident .COM & .EXE Infector
Detection Method: ViruScan, AVTK, F-Prot, NAV, Sweep, IBMAV,
NAVDX, VAlert, PCScan, ChAV,
NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N,
Removal Instructions: Delete infected files
The Taiwan 3 virus was isolated in June, 1990 in Taiwan, R.O.C. It
was dubbed the Taiwan 3 virus by John McAfee because it is the
third virus from Taiwan, the other two are Taiwan and Disk Killer.
This virus is not related to either of these two viruses.
The first time a program infected with the Taiwan 3 virus is
executed on a system, the virus will install itself memory resident
in low system free memory. Available free memory will decrease by
3,152 bytes. The virus hooks interrupt 21.
After becoming memory resident, Taiwan 3 will infect any program
which is executed. .COM files will increase in length by 2,900
bytes, .EXE files will increase by between 2,900 and 2,908 bytes.
Overlay files may also become infected as well.
It is unknown what the activation criteria is for this virus, or
what it does besides spreading.
See: Fu Manchu