Ilja-1704 Virus

Virus Name: Ilja-1704 Aliases: V Status: Rare Discovered: January, 1994 Symptoms: .COM file growth; file date/time changes Origin: Unknown Eff Length: 1,704 Bytes Type Code: PRaCK - Parasitic Resident .COM Infector Detection Method: AVTK, F-Prot, ViruScan, Sweep, IBMAV, NAV, NAVDX, VAlert, ChAV, NProt, Sweep/N, NShld, AVTK/N, IBMAV/N, Innoc, NAV/N Removal Instructions: Delete infected files General Comments: The Ilja-1704 virus was received in January, 1994. Its origin or point of isolation is unknown. Ilja-1704 is a memory resident infector of .COM programs, including COMMAND.COM. When the first Ilja-1704 infected program is executed, it will install itself memory resident in available free memory at 8E00:0000. Interrupts 16, 21, and 4C will be hooked by the virus in memory. Once the Ilja-1704 virus is memory resident, it will infect .COM programs, including COMMAND.COM, when they are executed. Infected programs will have a file length increase of 1,704 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. The following text strings are encrypted within the Ilja-1704 viral code: "COM" "EXE" Additionally, the text string "CR" can be found starting in the fourth byte of all infected files.