ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ VIRUS REPORT ³ ³ Icelandic Virus Version 3 ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ Synonyms: December 24th virus Date of Origin: December, 1989. Place of Origin: Iceland. Host Machine: PC compatibles. Host Files: Remains resident. Infects EXE files. OnScreen Symptoms: The message "Gledelig jol" may appear on December 24. Increase in Size of Infected Files: 843, 853, or 863 bytes. Nature of Damage: Affects system run-time operation. Corrupts program files. Detected by: Scanv57+, F-Prot, IBM Scan, Pro-Scan. Removed by: CleanUp, Scan/D, or F-Prot, or delete infected files. Derived from: Icelandic virus. Scan Code: May be identified by the last four bytes of an infected program, "1844,195F"H -- a reversal of the ID of Icelandic I and II. You can also search at offset 106H for 2E C6 06 6F 02 0A 90 50 53 51. The Icelandic-III virus is very similar to the Icelandic Virus, from which it was adapted. There are minor changes including the addition of several NOP instructions. This virus will not infect any program previously infected by Icelandic or Icelandic-II. If an infected program is run on December 24th of any year, programs subsequently run will be stopped, later displaying the message "Gledileg jol" ("Merry Christmas" in Icelandic) instead. ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» º This document was adapted from the book "Computer Viruses", º º which is copyright and distributed by the National Computer º º Security Association. It contains information compiled from º º many sources. To the best of our knowledge, all information º º presented here is accurate. º º º º Please send any updates or corrections to the NCSA, Suite 309, º º 4401-A Connecticut Ave NW, Washington, DC 20008. Or call our BBS º º and upload the information: (202) 364-1304. Or call us voice at º º (202) 364-8252. This version was produced May 22, 1990. º º º º The NCSA is a non-profit organization dedicated to improving º º computer security. Membership in the association is just $45 per º º year. Copies of the book "Computer Viruses", which provides º º detailed information on over 145 viruses, can be obtained from º º the NCSA. Member price: $44; non-member price: $55. º º º º The document is copyright (c) 1990 NCSA. º º º º This document may be distributed in any format, providing º º this message is not removed or altered. º ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ  Downloaded From P-80 International Information Systems 304-744-2253