Article View: comp.virus
Article #4925AIDS Trojan Update (PC)
From: Alan_J_Roberts
Date: Thu, 14 Dec 1989 00:58
Date: Thu, 14 Dec 1989 00:58
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This is a forward from John McAfee:
A lot more has been discovered about the AIDS Information
Trojan in the past 24 hours. First, the diskette does not
contain a virus. The install program does initiate a counter,
and based on a seemingly random number of re-boots, the trojan
will activate and destroy all data on the hard disk. The
diskette was mailed to at least 7,000 corporations, based on
information obtained from CW communications - one of the magazine
mailing label houses used by the perpetrators. The perpetrator's
initial investment in disks, printing and mailing is well in
excess of $158,000 according to a Chase Manhattan Bank estimate
that was quoted in a PC Business World press release from
London. The bogus company that sent the diskettes had rented
office space in Bond Street in London under the name of Ketema
and Associates. The perpetrators told the magazine label
companies that they contacted that they were preparing an
advertising mailer for a commercial software package from
Nigeria. All offices had been vacated at the time of the
mailing, and all addresses in the software and documentation are
bogus.
The Trojan creates several hidden subdirectories -- made up
of space and ASCII 255's -- in the root of drive C. The install
program is copied into one of these and named REM.EXE. The
user's original AUTOEXEC.BAT file is copied to a file called
AUTO.BAT. The first line of this file reads -- "REM Use this
file in place of AUTOEXEC.BAT for convenience". The installation
also creates a hidden AUTOEXEC.BAT file that contains the
commands:
C:
CD \
REM Use this file in place of AUTOEXEC.BAT
AUTO
The CD \ actually contains ASCII characters 255, which
causes the directory to change to one of the hidden directories
containing the REM.EXE file. The REM file is then executed and
decrements a counter at each reboot. After a random number of
reboots, the hard disk is wiped clean. Definitely a new
approach.
So far the mailings appear to be limited to western Europe.
No reports have been received from the U.S. If anyone does have
the diskette, or has already run the install program, a
disinfector has been written by Jim Bates and is available on
HomeBase for free download. 408 988 4004. The name of the
disinfector is AIDSOUT.COM.
John McAfee
Technical Details
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!rutgers!netnews.upenn.edu!vax1.cc.lehigh.edu!sei.cmu.edu!krvw From: Alan_J_Roberts@cup.portal.com Newsgroups: comp.virus Subject: AIDS Trojan Update (PC) Message-ID: <0009.8912141301.AA29075@ge.sei.cmu.edu> Date: 14 Dec 89 00:58:52 GMT Sender: Virus Discussion List <VIRUS-L@IBM1.CC.Lehigh.EDU> Lines: 49 Approved: krvw@sei.cmu.edu