391 Virus

Virus Name: 391 Aliases: V Status: Rare Discovery: July, 1994 Symptoms: .COM file growth Origin: Unknown Eff Length: 391 Bytes Type Code: PNCK - Parasitic Non-Resident .COM Infector Detection Method: AVTK, IBMAV, ViruScan, Sweep, F-Prot, NAV, NAVDX, VAlert, PCScan, Sweep/N, AVTK/N, IBMAV/N, NShld, NProt, NAV/N, LProt Removal Instructions: Delete infected files General Comments: The 391 virus was received in July, 1994. Its origin or point of isolation is unknown. This virus is a non-resident, direct action infector of .COM files, including COMMAND.COM. When a program infected with the 391 virus is executed, this virus will infect one .COM file located in the current directory. Infected programs will have a file length increase of 391 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 not be altered. The following text strings are visible within the viral code: "*.com" "????????COM"