70 lines
3.5 KiB
Plaintext
70 lines
3.5 KiB
Plaintext
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ
|
|||
|
|
<20> VIRUS REPORT <20>
|
|||
|
|
<20> 123nhalf <20>
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Date of Origin: September, 1989.
|
|||
|
|
|
|||
|
|
Host Machine: 80286-based micros.
|
|||
|
|
|
|||
|
|
Host Files: 123DOS.EXE
|
|||
|
|
|
|||
|
|
Increase in Size of Infected Files: 3907 bytes.
|
|||
|
|
|
|||
|
|
Nature of Damage: removes 1/2 of rows, columns in 1-2-3 ver. 3
|
|||
|
|
spreadsheet file.
|
|||
|
|
|
|||
|
|
This virus was so named because it causes a Lotus 1-2-3 release 3
|
|||
|
|
spreadsheet to be saved exactly one half the size it should be.<Note: For
|
|||
|
|
example, a 100 x 100 cell spreadsheet will only be saved as a 50 x 50 cell
|
|||
|
|
spreadsheet.>
|
|||
|
|
|
|||
|
|
The 123DOS.EXE file grows in size (one time) by 3907 bytes. Any
|
|||
|
|
spreadsheet saved after the virus has infected the file is exactly half
|
|||
|
|
the size of what it should be. If the 123DOS.EXE file is erased and
|
|||
|
|
restored from a backup, and 1-2-3 is run again, the file again grows in
|
|||
|
|
size.
|
|||
|
|
|
|||
|
|
This virus will only infect the 123DOS.EXE file, when running on a
|
|||
|
|
machine with a '286 processor. it will not infect the file on a '386
|
|||
|
|
system. The virus also will not infect files unless there is a minimum of
|
|||
|
|
3 megabytes of extended memory. Expanded memory does not matter and does
|
|||
|
|
not come into the picture.
|
|||
|
|
|
|||
|
|
Something is missing from our current understanding of this virus:
|
|||
|
|
if the virus infects only 123DOS.EXE, how do you get it? How would it
|
|||
|
|
spread? (Why, that is, would an infected copy of 123DOS.EXE ever find
|
|||
|
|
itself running with access to an uninfected copy; why would there ever be
|
|||
|
|
two different copies of the file on the same machine?). It is possible
|
|||
|
|
that the virus spread through the disks during production, or that it
|
|||
|
|
comes in with other software, and looks for 123DOS.EXE.
|
|||
|
|
|
|||
|
|
123SCAN.EXE detects the 123nhalf virus.
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ
|
|||
|
|
<EFBFBD> This document was adapted from the book "Computer Viruses", <20>
|
|||
|
|
<EFBFBD> which is copyright and distributed by the National Computer <20>
|
|||
|
|
<EFBFBD> Security Association. It contains information compiled from <20>
|
|||
|
|
<EFBFBD> many sources. To the best of our knowledge, all information <20>
|
|||
|
|
<EFBFBD> presented here is accurate. <20>
|
|||
|
|
<EFBFBD> <20>
|
|||
|
|
<EFBFBD> Please send any updates or corrections to the NCSA, Suite 309, <20>
|
|||
|
|
<EFBFBD> 4401-A Connecticut Ave NW, Washington, DC 20008. Or call our BBS <20>
|
|||
|
|
<EFBFBD> and upload the information: (202) 364-1304. Or call us voice at <20>
|
|||
|
|
<EFBFBD> (202) 364-8252. This version was produced May 22, 1990. <20>
|
|||
|
|
<EFBFBD> <20>
|
|||
|
|
<EFBFBD> The NCSA is a non-profit organization dedicated to improving <20>
|
|||
|
|
<EFBFBD> computer security. Membership in the association is just $45 per <20>
|
|||
|
|
<EFBFBD> year. Copies of the book "Computer Viruses", which provides <20>
|
|||
|
|
<EFBFBD> detailed information on over 145 viruses, can be obtained from <20>
|
|||
|
|
<EFBFBD> the NCSA. Member price: $44; non-member price: $55. <20>
|
|||
|
|
<EFBFBD> <20>
|
|||
|
|
<EFBFBD> The document is copyright (c) 1990 NCSA. <20>
|
|||
|
|
<EFBFBD> <20>
|
|||
|
|
<EFBFBD> This document may be distributed in any format, providing <20>
|
|||
|
|
<EFBFBD> this message is not removed or altered. <20>
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ
|
|||
|
|
5
|
|||
|
|
Downloaded From P-80 International Information Systems 304-744-2253
|