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- Path: sparky!uunet!dtix!darwin.sura.net!jvnc.net!netnews.upenn.edu!netnews.cc.lehigh.edu!news
- From: 72571.3352@compuserve.com (Wolfgang Stiller)
- Newsgroups: comp.virus
- Subject: Re: os/2 changes to boot sector (OS/2)
- Message-ID: <0013.9208260151.AA01769@barnabas.cert.org>
- Date: 22 Aug 92 20:57:35 GMT
- Sender: virus-l@lehigh.edu
- Lines: 94
- Approved: news@netnews.cc.lehigh.edu
-
- In Virus #141, ygoland@edison.SEAS.UCLA.EDU Yaron (The Jester) Goland
- writes:
-
- > I currently run a program called 'Integrity Master' by Wolfgang
- > Stiller. Among other things, this program checks the boot sector of
- > each partition against a copy it made of the partition,
- > to detect any changes. My harddrive is a 210 western digital
- > pyranna(sp) which is currently set up with three partitions:
- > OS/2 Boot Manager Partition-A 1 meg partition
- > Dos Partition-A 1 meg partition
- > FAT/HPFS-I have one last partition which is 200 or so megs
- > and is then subdivided into two logical partition,
- > the first is fat and the second is hpfs.
- >
- > My Problem is as follows:When I run IM (Integrity Master) under os/2
- > to initialize the boot sector, I don't have any problems. However if
- > I then change to dos, dos will say that the D drive boot sector
- > has changed!
-
- That's because it _HAS_ changed. When you boot back to DOS you are
- using a different boot sector. I don't use boot manager myself but I
- use dual boot and experience exactly what you're talking about. The
- simple solution would be to check your boot sectors under either DOS
- or OS/2 (but not both) and stick to that or else use separate .SID and
- .SRL (sector ID and Sector reload) files for each system. You could
- use a batch file to switch the files when you boot the other operating
- system.
-
- Also, as I understand it, Boot Manager may switch the active
- partition. This change alters the master boot record (AKA partition
- sector). If this is the sector IM is reporting as changed, (it calls
- the MBR the "partition sector" as opposed to the "DOS Boot sector" to
- avoid confusion.
-
- > In addition it will say that there is a self executing
- > program in my D drive dos boot sector!
-
- What do you mean by "self executing" program?
-
- All boot sectors may contain a program. Integrity Master does not
- talk about "self executing" programs so I'm baffled as to what you are
- asking about here.
-
- > In addition if I then do NOT
- > re-initalize my data (i.e. its still comparing my current boot
- > sector to the picture it has in it's memory) and return to os/2,
- > IM will still say that there is a problem!
-
- Please be more specific. What problem does it say there is. I have
- gone out of my way to make sure that Integrity Master is very clear
- and very specific. It uses simple language to explain exactly what it
- finds wrong. It won't just say "there is a problem", it will say
- exactly what is wrong and also suggest what might have caused the
- problem and then suggest specific steps to correct the problem.
-
- > Matters are further
- > complicated by the fact that I just had a cmos failure. The specific
- > failure was that my harddrive and both my disk drives settings were
- > set to 'disabled'. This could very well be a battery failure
-
- You're correct; battery failure is the most likely explanation for
- these symptoms.
-
- > My Question is as follows:Does os/2 change the boot sector of
- > drives under it's control?
-
- Yes, please see my prior comments.
-
- > In addition, I understand why my first 1
- > meg, boot manager, partition would have a self booting program in it
- > but why should my D drive have one? Os/2 does NOT boot from D drive
- > and dos boots from C drive!
-
- See my prior comments. All of your boot sectors contain executable
- code or do you mean something else by "self booting"?
-
- > So should there be a self running
- > program on my D drive? I'm very concerned as this sort of activity
- > is standard viral activity.
-
- This sounds normal, you need not be concerned by this.
-
- > And finally, is there any known virus
- > which targets cmos and clears out sections of it?
-
- A virus or trojan certainly could modify your CMOS but this is much
- more likely to happen due to hardware or software glitch or even an
- unknowledgeable user executing the setup program on your PC.
-
- Regards, Wolfgang Wolfgang Stiller
- Stiller Research
- Author of Integrity Master(tm) 2625 Ridgeway St.
- Tallahassee, FL 32310
- U.S.A.
-