Stone`90 Virus

Virus Name: Stone`90 Aliases: Polish 961, Stone-90 V Status: Rare Discovered: December, 1990 Symptoms: .COM file growth Origin: Poland Eff Length: 961 Bytes Type Code: PNCK - Parasitic Non-Resident .COM Infector Detection Method: ViruScan, AVTK, F-Prot, Sweep, PCScan, NAV, IBMAV, NAVDX, VAlert, ChAV, NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N, NAV/N, IBMAV/N Removal Instructions: Delete infected files General Comments: The Stone`90 virus, or Polish 961, is a non-resident direct action infector of .COM programs, including COMMAND.COM. It was submitted in December, 1990, and is from Poland. When a program infected with the Stone`90 virus is executed, the virus will look for one .COM program on the current drive and in the current directory to infect. If one is found, the virus will infected it. The newly infected .COM program will increase in length by 961 bytes, and have the virus's code located at the end of the program. The following text strings can be found in infected files: "Sorry, I`m INFECTED!" "I`m already NOT infected!" "(C) Stone`90" Stone`90 does not appear to do anything besides replicate.