Chaser Virus

Virus Name: Chaser Aliases: V Status: Rare Discovery: June, 1992 Symptoms: .EXE file growth; system hangs Origin: Unknown Eff Length: 980 - 994 Bytes Type Code: PNE - Parasitic Non-Resident .EXE Infector Detection Method: ViruScan, Sweep, IBMAV, F-Prot, AVTK, NAV, NAVDX, VAlert, PCScan, ChAV, NShld, Sweep/N, Innoc, AVTK/N, NProt, IBMAV/N, NAV/N, LProt Removal Instructions: Delete infected files General Comments: The Chaser virus was isolated in June, 1992. Its origin or point of isolation are unknown. Chaser is a non-resident direct action infector of .EXE programs. When a program infected with the Chaser virus is executed, the Chaser virus will infect one .EXE program located in the current drive's current directory. Once it has infected a program, a system hang will occur. The program the user was attempting to execute will not be run. Programs infected with the Chaser virus will have a file length increase of 980 to 994 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. No text strings are visible within the viral code in Chaser infected programs.