Null Set Virus

Virus Name: Null Set Aliases: Null 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, NAV/N Removal Instructions: Delete infected files General Comments: 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 infected it. 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. See: Doomsday