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- From: medici@dorm.rutgers.edu (Mark Medici)
- Newsgroups: comp.virus
- Subject: Re: SCAN 95b doesn't find MtE in EXE files (PC)
- Message-ID: <0018.9211171913.AA17490@barnabas.cert.org>
- Date: 17 Nov 92 01:47:17 GMT
- Sender: virus-l@lehigh.edu
- Lines: 34
- Approved: news@netnews.cc.lehigh.edu
-
- frisk@complex.is (Fridrik Skulason) writes:
-
- [in reference to various virus scanners missing MtE in .COM's converted
- to .EXE's via COM2EXE...]
-
- | Not surprising - what you did was simply to add a new layer of
- | encryption to the files. Of course, the virus could be distributed in
- | this form, and would probably replicate, but all the second (and
- | later) generation copies would be detected normally.
-
- [...]
-
- | I don't consider it a serious problem - basically it is equivalent to
- | distributing an old virus, with a new encryption wrapper...the
- | original sample will not be found, but all the second generation
- | copies will.
-
- I'm not sure that I agree with that. While it's good that the second
- generation infections will be detected, (and, presumably, eradicated),
- if the original vector for the virus remains undiscovered, further
- infections will inevitably occur. If nothing else, this would be a
- continual time waster, as sysadmin's go around cleaning-up detected
- instances of the virus and trying to find the source of the problem,
- which could be right on their own PC.
-
- Of course, if a person didn't take the time to check the .COM for
- virus before converting to .EXE (or compressing with PKLITE/LZE/etc),
- s/he is asking for trouble anyway. But that doesn't exclude a baddy
- from doing this on purpose to make the virus harder to detect.
- - --
- _________________________________________________________________________
- RUCS | Mark A. Medici, Systems Programmer III, User Services Division
- User | Rutgers University Computing Services, New Brunswick, NJ 08903
- Services | [medici@gandalf.rutgers.edu] [908-932-2412]
-