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- From: mcafee@netcom.com (McAfee Associates)
- Newsgroups: comp.virus
- Subject: Re: SCAN 95b doesn't find MtE in EXE files (PC)
- Message-ID: <0013.9211091912.AA05064@barnabas.cert.org>
- Date: 3 Nov 92 04:37:12 GMT
- Sender: virus-l@lehigh.edu
- Lines: 138
- Approved: news@netnews.cc.lehigh.edu
-
- Hello Vesselin,
-
- you write:
- [...my comments about release dates on V95 and V97 deleted...]
- [The ">>" indicates comments from me.]
-
- >When the preliminary tests were done, the latest available version of
- >SCAN was 95b. Since the results were alarming, I decided that it is my
- >duty to inform the users about a particular deficency in the then
- >latest version of the product. Even if a newer version of the product
- >were available (which it wasn't then), and even if it were able to
- >detect the MtE-based viruses reliably (which it still isn't, see
- >below), my message would alarm the users to urgently upgrade to the
- >newer version. I still think that there is nothing incorrect in what I
- >have done.
-
- SCAN missed 317 out of 15,996 viruses, or about 0.02% of the samples.
- Rather than post the "alarming" results, do you not think a message to
- myself (or better yet, to one of our programmers) would have sufficed?
-
- A detection rate of approximately 99.8% on a virus, or set of MtE-based
- viruses does not seem especially bad, in lieu of the fact that we have
- not received any confirmed reports of the virus yet [outside of virus-
- exchange BBS's and the like].
-
- [...comments about detection of MtE-based viruses added in SCAN V97
- from myself and your comments about downloading V97 deleted...]
-
- >The results are rather poor - they clearly show that version 97 of
- >SCAN is not able to detect reliably ANY of the MtE-based viruses too.
- >I have proven this to you, by sending you a batch of examples that
-
- Yes, you have, and I am not so much questioning this as the manner in
- which it was reported.
-
- >SCAN 97 was unable to detect. I have also offered to help you fixing
- >the problem and even suggested an easy solution for the other 284
- >missed samples. What do you want more?
-
- Next time, perhaps you could check with us about your results? I think
- it would be more appropriate to say "SCAN missed X out of Y samples of
- the Z virus. I've notified McAfee Associates of the problem and they
- will (hopefully) fix it shortly." than your earlier post, which seemed
- rather alarmist to me.
-
- >> I can understand your desire to provide the readers of comp.virus with
- >> timely, accurate information about the efficacy of different anti-viral
- >> packages, however, posting one message decrying the deficiencies of
- >> one brand of software with an endnote about other packages sounds less
- >> like a genuine attempt at impartial research and more like alarmist scare
- >> tactics, or even worse, marketing :-)
- >
- >It's very strange to see the above posted by someone from McAfee
- >Associates... Even if we don't pay attention to the fact that it does
- >not correspond to the truth (as I explained above), I still remember
-
- You did download V97 of SCAN as fast as you could and repeat your
- tests, which I find commendable. Even if I don't agree with how
- you reported the results.
-
- >an article posted somewhere (maybe even here), which described how
- >McAfee Associates sponsored a particular set of anti-virus product
- >evaluations and insisted that only old versions of the scanners of
- >their main competitors were tested.
-
- McAfee Associates has sponsored (that is, paid for) anti-virus product
- testing by a number of independent organizations, using then-available
- versions of competitors' anti-viral programs. To do otherwise would be
- worthless.
-
- >> I note that several other anti-viral
- >> packages such as NAV, CPAV, Untouchable, Novi are not mentioned at all.
- >
- >I don't have a copy of Novi. And, unlike your product, all the
- >products mentioned above are not shareware - they are all commercial,
-
- True, but they all of them are also widely-used, at least here in
- America. In Europe, I would imagine that Dr. Solomon's AVTK is used
- more widely, etc.
-
- >so I obviously cannot easily get the latest versions as quickly as
- >with your product. Besides, I am only a human and cannot do everything
-
- As am I. [Shut up, Spencer]
-
- >at once. In fact, the MtE tests even of your product were made
- >possible mainly because two visiting students from Rostok spent a lot
- >of time to generate 16,000 naturally infected samples (do you
- >understand what all this means, having in mind that some of the
- >MtE-based viruses infect only 2-3 samples in the current directory and
- >do not go resident?), and one of our students urgently ran two tests
- >(with version 95b and 97 of SCAN) and summarized the results...
- >
- >I -will- publish MtE detection data for 17 scanners, each of which
- >claims (like yours) that it is able to detect all MtE-based viruses
-
- Hopefully they will be published together at once.
-
- [Moderator's note: Vesselin's MtE tests are available from:
- cert.org:pub/virus-l/docs/mtetests.zip
- ftp.informatik.uni-hamburg.de:pub/virus/texts/tests/mtetests.zip
- For those without FTP access to the net, I have broken Vesselin's
- tests down into multiple chunks and will be posting each separately.]
-
- >with 100% reliability... As I said, I don't know about Novi, because
- >I don't have it, but NAV 2.1, CPAV 1.3, and UTScan 23.00.12 (the
- >scanner part of the Untouchable, since Untouchable is mainly an
- >integrity-based product) all failed the test - just like SCAN 97, they
- >turned out to be unable to detect all MtE-based viruses used during
- >the test reliably.
- >
- >> In any case, I would strongly suggest that you complete your research in
- >> the future before posting incomplete results.
- >
- >I am doing my best to provide the most complete data possible to the
- >users. So does the rest of the VTC-Hamburg. What has been observed in
- >SCAN 95b was a BUG, that's why I was precipitated to publish the
- >information about it. Or do you want to hide from your users that a
- >particular (even if not the latest) version of your program is buggy
- >and provides a false sense of security?
- [...rest of message deleted...]
-
- Bugs can be fixed. Bearing in mind that I am, after all, a McAfee
- Associates employee, I believe that McAfee Associates (and myself) have
- been very forthcoming to users about reporting bugs, fixing them, and
- suggesting workarounds while the bugs do get fixed.
-
- Regards,
-
- Aryeh Goretsky
- Technical Support
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