595 Virus

Virus Name: 595 Aliases: V Status: Rare Discovery: September, 1992 Symptoms: .COM file growth; file date/time changes Origin: Unknown Eff Length: 595 Bytes Type Code: PNCK - Parasitic Non-Resident .COM Infector Detection Method: ViruScan, AVTK, F-Prot, Sweep, IBMAV, NAV, NAVDX, VAlert, PCScan, ChAV, NShld, AVTK/N, NProt, Sweep/N, IBMAV/N, Innoc, NAV/N Removal Instructions: Delete infected files General Comments: The 595 virus was received in September, 1992. Its origin or point of isolation is unknown. The 595 virus is a non-resident direct action infector of .COM programs, including COMMAND.COM. When a program infected with the 595 virus is executed, the 595 virus will infect one .COM program located in the current directory. If all of the .COM files in the current directory are already infected, the virus will search for a .COM program in the C: drive root directory to infect. Infected programs will have a file length increase of 599 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 have been updated to the current system date and time when infection occurred. There is one text string visible within the viral code in infected programs: "????????COM" It is unknown if 595 does anything besides replicate.