Satana Virus

Virus Name: Satana Aliases: Satana.665 V Status: New Discovery: January, 1996 Symptoms: .COM & .EXE growth; file date/time seconds = "62"; decrease in available free memory Origin: Unknown Eff Length: 665 Bytes Type Code: PRhAK - Parasitic Resident .COM & .EXE Infector Detection Method: ChAV, F-Prot, IBMAV, AVTK, ViruScan, NAV, NAVDX, Innoc, IBMAV/N, AVTK/N, NShld, NAV/N Removal Instructions: Delete infected files General Comments: The Satana or Satana.665 virus was received in January, 1996. Its origin or point of isolation is unknown. Satana is a memory resident fast infector of .COM and .EXE files, including COMMAND.COM. When the first Satana 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 688 bytes. Interrupt 21 will be hooked by the virus in memory. Once the Satana virus is memory resident, it will infect .COM and .EXE files when they are executed or opened, but not when copied. Infected files will have a file length increase of 665 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 appear to be altered, though the seconds field will have been set to "62". The following text string is visible within the viral code: "SATANA 666 (C) EA inc."