Coyote Virus

Virus Name: Coyote Aliases: V Status: New Discovery: December, 1994 Symptoms: .EXE file growth; decrease in total system & available free memory Origin: Unknown Eff Length: 1,103 - 1,117 Bytes Type Code: PRhE - Parasitic Resident .EXE Infector Detection Method: ViruScan, NAV, NAVDX, IBMAV, F-Prot 2.22+, PCScan, AVTK 7.60+, ChAV, NProt, NShld, NAV/N, IBMAV/N, LProt, AVTK/N 7.60+, Innoc 4.0+ Removal Instructions: Delete infected files General Comments: The Coyote virus was received in December, 1994. Its origin or point of isolation is unknown. Coyote is a memory resident infector of .EXE files. When the first Coyote infected program is executed, this virus will install itself memory resident at the top of system memory but below the 640K DOS boundary. Total system and available free memory, as indicated by the DOS CHKDSK program, will have decreased by 2,048 bytes. Interrupts 14, 17 and 21 will be hooked by the virus in memory. Once the Coyote virus is memory resident, it will infect .EXE files when they are executed. Infected programs will have a file length increase of 1,103 to 1,117 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. The following text strings are visible within the viral code in all Coyote infected files: "Ipan in xiktli meztli" "Coyote" It is unknown what Coyote does besides replicate.