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                    і        VIRUS REPORT         і
                    і         Jork Virus          і
                    АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ

Host Machine: PC compatibles.

Host Files: Remains resident. Infects floppy disk boot sector.

Increase in Size of Infected Files: n/a.

Nature of Damage: Corrupts or overwrites boot sector.

Derived from: Shoe_virus (Ashar).

     This virus is exactly the same as the Shoe_virus (Ashar) in
operation. It was patched to replace offset 0202H, which reads as
follows in the Shoe virus:

(c) 1986 Brain & Amjads (pvt) Ltd 

     with

(c) 1986 Jork & Amjads (pvt) Ltd 

     Another patch the author made to the Shoe_virus was to reduce the
identifying text at offset 0010H to "Welcome to the Dungeon (c) 1986
Brain".


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є  This document was adapted from the book "Computer Viruses",       є
є  which is copyright and distributed by the National Computer       є
є  Security Association. It contains information compiled from       є
є  many sources. To the best of our knowledge, all information       є
є  presented here is accurate.                                       є
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є  Please send any updates or corrections to the NCSA, Suite 309,    є
є  4401-A Connecticut Ave NW, Washington, DC 20008. Or call our BBS  є
є  and upload the information: (202) 364-1304. Or call us voice at   є
є  (202) 364-8252. This version was produced May 22, 1990.           є
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є  The NCSA is a non-profit organization dedicated to improving      є
є  computer security. Membership in the association is just $45 per  є
є  year. Copies of the book "Computer Viruses", which provides       є
є  detailed information on over 145 viruses, can be obtained from    є
є  the NCSA. Member price: $44; non-member price: $55.               є
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є            The document is copyright (c) 1990 NCSA.                є
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є  This document may be distributed in any format, providing         є
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