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From: AIL0@NS.CC.LEHIGH.EDU (Arthur I. Larky)
Newsgroups: comp.virus
Subject: Zenith Dos Writes (PC)
Message-ID: <0008.9104231715.AA16173@ubu.cert.sei.cmu.edu>
Date: 22 Apr 91 23:03:13 GMT
Sender: Virus Discussion List <VIRUS-L@LEHIIBM1>
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Approved: krvw@sei.cmu.edu

Some versions (or maybe all versions) of Zenith MSDOS write the date
and time someplace in the system every time you write a file.  If you
have a system without a real-time clock, you can prove this by not
setting date and time when you boot up.  It will be set to the time of
the last file write.  This does, of course, upset all kinds of
virus-hunting programs.
  (I have, on occasion, taken advantage of this property of my Zenith
158).
  Art Larky
  Professor, CSEE Dept
  Lehigh University