Granada Virus

Virus Name: Granada Aliases: V Status: Rare Discovered: July, 1993 Symptoms: .COM file growth; TSR; beeping & scrolling display of characters from memory Origin: The Netherlands Eff Length: 2,765 Bytes Type Code: PRsC - Parasitic Resident .COM Infector Detection Method: ViruScan, IBMAV, F-Prot, Sweep, AVTK, NAV, NAVDX, VAlert, PCScan, NShld, NProt, Sweep/N, AVTK/N, IBMAV/N, NAV/N Removal Instructions: Delete infected files General Comments: The Granada virus was received in July, 1993. Its origin or point of isolation is unknown. Granada is a memory resident infector of .COM programs, but not COMMAND.COM. When the first Granada infected program is executed, this virus will install itself memory resident as a low system memory TSR of 3,072 bytes, hooking interrupts 08 and 21. Once the Granada virus is memory resident, it will infect .COM programs, other than COMMAND.COM, when they are executed. Infected programs will have a file length increase of 2,765 bytes with the virus being located at the beginning of the file. The program's date and time in the DOS disk directory will not be altered. One text string is encrypted within the viral code: "COMMAND.COM" It is unknown what Granada does besides replicate, though on some systems, executing an infected program will result in beeping and a scrolling display of characters from the viral code on the system monitor.