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- Path: sparky!uunet!gatech!darwin.sura.net!jvnc.net!netnews.upenn.edu!netnews.cc.lehigh.edu!news
- From: MC1980@mclink.it (Luca Parisi)
- Newsgroups: comp.virus
- Subject: Another Kind Of Droppers (PC)
- Message-ID: <0002.9212221358.AA03720@barnabas.cert.org>
- Date: 19 Dec 92 22:15:35 GMT
- Sender: virus-l@lehigh.edu
- Lines: 24
- Approved: news@netnews.cc.lehigh.edu
-
- Not much time ago, a posting by Stefano Turci (Stefano_Turci@
- f108.n391.z9.virnet.bad.se) prompted discussion about the fact that
- converting a file from .COM to .EXE caused scanners not to recognize
- some virus infections any more.
-
- I don't have much to object to the views expressed by the scanners
- themselves (well, actually their authors :-) but I faced the same
- problem while dealing with the "leftovers" of my previous posting.
-
- That is, files infected with virus 855 (Nov. 17th) and subsequently
- immunized with CPAV 1.2 are not recognized as such by F-Prot 2.06,
- Scan 97 or VirX 2.4 (I know they are not entirely up-to-date, but all
- three recognize the 'vanilla' infection on the same files).
-
- I don't think this is more than an "academic" problem unless the
- current DOS version of CPAV still offers immunization, and a bit more
- if the rumored MSDOS 6.0-bundled one does (the most recent plain DOS
- CPAV I have is 1.2, and WinCPAV doesn't). More generally, I'd say that
- the integrity check should be a built-in function, otherwise it can
- only build false security. But somebody here must have said that
- before and better than me...
-
- Luca Parisi
- <MC1980@mclink.it>
-