Elaine Virus

Virus Name: Elaine Aliases: Elaine.1127 V Status: New Discovered: January, 1996 Symptoms: .COM & .EXE growth; decrease in available free memory; file date/time seconds = 62 Origin: Unknown Eff Length: 1,127 - 1,141 Bytes Type Code: PRhA - Parasitic Resident .COM & .EXE Infector Detection Method: NAV, NAVDX, ViruScan, IBMAV, AVTK, PCScan, F-Prot, ChAV, AVTK/N, NAV/N, NShld, IBMAV/N, LProt, Innoc 4.0+ Removal Instructions: Delete infected files General Comments: The Elaine virus was received in January, 1996. Its origin or point of isolation is unknown. Elaine is a memory resident infector of .COM and .EXE files, but not COMMAND.COM. When the first Elaine infected program is executed, this virus will install itself memory resident at the top of system memory but below the 640K DOS boundary, not moving interrupt 12's return. Available free memory, as indicated by the DOS CHKDSK program from DOS 5.0, will have decreased by 1,456 bytes. Interrupts 13 and 21 will be hooked by the virus in memory. Once the Elaine virus is memory resident, it will infect .COM and .EXE files, but not COMMAND.COM, when they are executed. Infected .COM files will have a file length increase of 1,127 bytes while .EXE files will increase in size by 1,127 to 1,141 bytes. In both cases, the virus will be located at the end of the file. The program's date and time in the DOS disk directory listing will not appear to be altered, though the seconds field will have been set to "62". The following text strings are visible within the viral code in all infected files: "Elaine 1.0 28 May 1994" "E1.0=N" It is unknown what the Elaine virus may do besides replicate.