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NCSA Virus Report #131
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? VIRUS REPORT ?
? Typo (Boot infector) ?
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Synonyms: Mistake virus
Date of Origin: June, 1989.
Place of Origin: Israel.
Host Machine: PC compatibles.
Host Files: Remains resident. Infects floppy and hard disk boot sectors.
Increase in Size of Infected Files: n/a.
Nature of Damage: Affects system run-time operation. Corrupts or
overwrites boot sector.
Detected by: Scanv56+, F-Prot, IBM Scan, Pro-Scan.
Removed by: MDisk, F-Prot, or DOS SYS command.
Derived from: Ping Pong?
Typo Boot was first isolated in Israel by Y. Radai in June, 1989.
This virus takes up 2K at the upper end of system memory once it has
become memory resident.
The virus will swap some characters on printouts with phonemes (for
example, C vs. K), and transpose or substitute digits. Only printouts
are affected.
Typo Boot may be derived from Ping Pong, because the two have very
similar internal structures. It can be removed from a disk by using
MDisk, CleanUp, DOS SYS command, or just about any Ping Pong
disinfector.
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? This document was adapted from the book "Computer Viruses", ?
? which is copyright and distributed by the National Computer ?
? Security Association. It contains information compiled from ?
? many sources. To the best of our knowledge, all information ?
? presented here is accurate. ?
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? Please send any updates or corrections to the NCSA, Suite 309, ?
? 4401-A Connecticut Ave NW, Washington, DC 20008. Or call our BBS ?
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? (202) 364-8252. This version was produced May 22, 1990. ?
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? year. Copies of the book "Computer Viruses", which provides ?
? detailed information on over 145 viruses, can be obtained from ?
? the NCSA. Member price: $44; non-member price: $55. ?
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? The document is copyright © 1990 NCSA. ?
? ?
? This document may be distributed in any format, providing ?
? this message is not removed or altered. ?
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