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- From: CSCRDW%CURIE@vaxtm1.rtpnc.epa.gov (Ron Whittle)
- Newsgroups: comp.virus
- Subject: A-V virus
- Message-ID: <0002.9301121242.AA22066@barnabas.cert.org>
- Date: 7 Jan 93 15:36:10 GMT
- Sender: virus-l@lehigh.edu
- Lines: 41
- Approved: news@netnews.cc.lehigh.edu
-
- On Tue, 22 Dec 92, Suzana wrote:
-
- S> Suppose that we have an A-V product which in regular intervals or
- S> randomly send a virus in system. Virus (fast infector) infects only
- S> programs which checksum doesn't correspond to previously calculated
- S> values. If no such program is found virus deletes itself or removes
- S> from memory. If changed program found virus activates scanner to check
- S> if there is any known virus. If known virus is found message is sent
- S> to the user. If program is changed and no known virus is found the
- S> message is sent to the user to make decision. If decision is to leave
- S> program as is, virus cuts itself from the program. The whole process
- S> (except messages) takes place in background. There is no need for all
- S> A-V program (which is combination of I-checker and scanner) to be TSR,
- S> only virus is occasionally TSR.
-
- This looks interesting, but you might run into performance problems
- as the 'good virus' looks for non-infected programs. Also, if you
- had a stealth virus that was already active in memory, when your
- virus infects a file, it might overwrite part of the program code (or
- the stealth virus, depending on infection method), causing you to
- lose the program.
-
- Wouldn't this program be easier as a TSR? That way it wouldn't have
- to infect the files, and only needs to check programs that you
- actually execute.
-
- S> There is slight similarity in this
- S> idea with reaction of human immunity system. Anyone has ethical
- S> problem with her/his own immunity system ?
-
- Actually, yes. Since my immunity system makes periodic attempts to
- kill me, in the name of protecting me, I do have a problem with it.
- You see, I am one of those unfortunate people who are allergic to
- bees. Each time I am stung, my immune system makes a faster and
- harsher response, and one day this will kill me if I do not get
- medical help. Is it possible that the A-V virus might (accidentally)
- act in the same way?
-
- - ---
- Ron Whittle
- cscrdw%curie@epavax.rtpnc.epa.gov
-