Null Set Virus
Virus Name: Null Set
V Status: Rare
Discovered: February, 1992
Symptoms: .COM file growth
Origin: United States
Eff Length: 733 Bytes
Type Code: PNCK - Parasitic Non-Resident .COM Infector
Detection Method: ViruScan, F-Prot, Sweep, IBMAV, ChAV,
AVTK, NAV, NAVDX, VAlert, PCScan,
NShld, Sweep/N, LProt, Innoc, NProt, AVTK/N, IBMAV/N,
Removal Instructions: Delete infected files
The Null Set virus was submitted in February, 1992. It is from the
United States. Null Set is a non-resident direct action infector of
.COM programs, including COMMAND.COM.
When a program infected with the Null Set virus is executed, the
virus will search the current directory to locate the first
previously uninfected .COM program over approximately 700 bytes in
size. If an uninfected .COM program is located, the virus will
Programs infected with the Null Set virus will have a file length
increase of 733 bytes. The virus will be located at the end of the
program. The file's date and time in the DOS disk directory
listing will not be altered.
Null Set doesn't appear to do anything besides replicate.