83 lines
4.0 KiB
Plaintext
83 lines
4.0 KiB
Plaintext
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
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³ VIRUS REPORT ³
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³ Icelandic 1 ³
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ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
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Synonyms: Saratoga 1, Icelandic, One in Ten, Disk Crunching Virus.
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Date of Origin: June, 1989.
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Place of Origin: Iceland.
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Host Machine: PC compatibles.
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Host Files: Remains resident. Infects EXE files.
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Increase in Size of Infected Files: 642 bytes. A variant adds 656 bytes.
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Another grows by 671 bytes. File lengths after infection are divisible
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by 16.
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Nature of Damage: Affects system run-time operation. Corrupts program
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files.
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Detected by: Scanv56+, F-Prot, Pro-Scan.
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Removed by: CleanUp, Scan/D, or F-Prot.
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Scan Code: Infected files always end with 44 18 5F 19. You can also
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search at offset 0C6H for 2E C6 06 87 02 0A 90 50 53 51.
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The Icelandic virus was first detected in June, 1989, disassembled a
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week later, and the disassembly was made available around the beginning
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of July. The basic Icelandic virus is a resident EXE-file infector that
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infects every second EXE file executed, and sometimes will mark a free
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cluster on a hard disk as bad (the "damage" routine).
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The Icelandic virus will copy itself to the top of free memory the
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first time an infected program is executed. Once in high memory, it hides
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from memory mapping programs. If a program later tries to write to this
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area of memory, the computer will crash. If the virus finds that some
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other program has "hooked" Interrupt 13, it will not proceed to infect
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programs. If Interrupt 13 has not been "hooked", it will attempt to
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infect every 10th program executed.
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The virus attaches itself to the end of the programs it infects, and
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infected files will always end with "4418,5F19"H.
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On systems with 12-bit FATs (floppy drives or 10 MB hard disks), the
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virus will not cause any damage. However, on systems with 16-bit FATs
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(hard disks larger than 10 MB), the virus will select one unused FAT
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entry and mark the entry as a bad sector each time it infects a program.
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It is likely that as of this writing, the virus has not been detected
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outside of Iceland. Several variants are known, including Saratoga 2,
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Icelandic Virus Version 2, and MIX1. See also the table.<Note: Prepared
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by Y. Radai, Hebrew University of Jerusalem.><$&3 Icelandic>
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ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
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º This document was adapted from the book "Computer Viruses", º
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º which is copyright and distributed by the National Computer º
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º Security Association. It contains information compiled from º
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º many sources. To the best of our knowledge, all information º
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º presented here is accurate. º
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º º
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º Please send any updates or corrections to the NCSA, Suite 309, º
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º 4401-A Connecticut Ave NW, Washington, DC 20008. Or call our BBS º
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º and upload the information: (202) 364-1304. Or call us voice at º
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º (202) 364-8252. This version was produced May 22, 1990. º
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º º
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º The NCSA is a non-profit organization dedicated to improving º
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º computer security. Membership in the association is just $45 per º
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º year. Copies of the book "Computer Viruses", which provides º
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º detailed information on over 145 viruses, can be obtained from º
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º the NCSA. Member price: $44; non-member price: $55. º
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º º
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º The document is copyright (c) 1990 NCSA. º
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º º
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º This document may be distributed in any format, providing º
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º this message is not removed or altered. º
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ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
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