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NCSA Virus Report #105
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? VIRUS REPORT ?
? Pentagon Virus ?
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Place of Origin: Washington, D.C.
Host Machine: PC compatibles.
Host Files: Resident. 360K floppy disk boot sector.
Increase in Size of Infected Files: n/a.
Nature of Damage: Corrupts or overwrites boot sector.
Detected by: Scanv56+, F-Prot.
Removed by: MDisk, CleanUp, or DOS SYS command.
Scan Code: You can search at offset 03EH for 8E D8 FB BD 44 7C 81 76 06.
The Pentagon virus consists of:
* a normal MS-DOS 3.20 boot sector where the name "IBM" has been
replaced by "HAL".
* A file with the name of the hex character 0F9H. This file contains the
portion of the virus code which would not fit into the boot sector, as
well as the original boot sector of the infected disk. This file is
addressed by its absolute address, rather than name.
* A file named PENTAGON.TXT that does not appear to be used or contain
any data. Portions of this virus are encrypted.
The Pentagon virus will look for and remove the Brain virus from any
disk that it infects. It is memory resident, occupying 5K of RAM, and can
survive a warm reboot.
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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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