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NCSA Virus Report #56
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? VIRUS REPORT ?
? Do Nothing Virus ?
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Synonyms: Stupid virus
Date of Origin: October, 1989.
Place of Origin: Israel.
Host Machine: PC compatibles.
Host Files: Resident. Infects COM files.
Increase in Size of Infected Files: 608 bytes.
Nature of Damage: Corrupts program files. Does no apparent damage.
Detected by: Scanv49+, F-Prot, Pro-Scan.
Removed by: CleanUp, Scan/D, or F-Prot.
This virus was first reported in October, 1989 by Uval Tal in Israel.
It infects the first COM file in the current directory, and will
re-infect it again and again. It infects no other files, and causes no
other damage.
It has been called the "stupid" virus because it is so ineffectual
compared to other viruses. For instance:
* It always installs in memory in the same location, at address
9800:100H
* Any program which attempts to use this memory location destroys the
memory-resident copy of the virus.
* It can only infect systems with 640K of memory.
* It can not reach across directories.
* It cannot determine if the file it is infecting has previously been
infected.
* It does no apparent damage to anything but the first COM file in a
directory.
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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. ?
? ?
? Please send any updates or corrections to the NCSA, Suite 309, ?
? 4401-A Connecticut Ave NW, Washington, DC 20008. Or call our BBS ?
? and upload the information: (202) 364-1304. Or call us voice at ?
? (202) 364-8252. This version was produced May 22, 1990. ?
? ?
? The NCSA is a non-profit organization dedicated to improving ?
? computer security. Membership in the association is just $45 per ?
? 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. ?
? ?
? 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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