Message-ID: <9B66BBD37D5DD411B8CE00508B69700F05ADDA78@pborolocal.rnib.org.uk>
From: John.Airey at rnib.org.uk (John.Airey@...b.org.uk)
Subject: Removing ShKit Root Kit

> -----Original Message-----
> From: Cael Abal [mailto:lists@...you.com]
> Sent: 23 December 2003 15:08
> To: full-disclosure@...ts.netsys.com
> Subject: Re: [Full-Disclosure] Removing ShKit Root Kit
> 
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> |>> OK, so how does the attacker get the ADS to run? If you open
> |>> something.txt in notepad, it doesn't launch the ADS 
> 'trouble.exe' as
> |>> an executable file. It's ignored.
> |
> | The easy answer is start a command prompt and type
> |
> | start something.txt:trouble.exe
> |
> | it does not even have to be tagged .exe or .com or whatever. As an
> | exercise, copy notepad.exe to calc.exe:notepad and then 
> launch a command
> | prompt and type "start calc.exe:notepad" You should be looking at
> | notepad. I no longer have a handy M$ system to verify the 
> steps on so if
> | it does not work play with it for a few minutes.
> 
> Although Jason is exactly right about ADS' under NTFS as covert data
> storage (in theory, even if his examples don't quite work) it's all a
> bit off topic -- the server in question was a RH 8.0 box and besides,
> ADS' are trivial to find if you're looking for them and 
> aren't likely to
> see much use in the wild.
> 
> All this discussion about particulars is beside the point -- 
> the thrust
> of the matter is that attacker/defender roles have been reversed,
> leaving the good guy in an untenable position.  Do you really 
> think it's
> wise to bet you're smarter or more resourceful than a person who has
> (already) rooted the box once?
> 
> take care,
> 
> Cael
> 
An even better solution is to have a method of installing a machine where
the latest program packages can be installed and the configuration can be
repeated. Red Hat comes with this ability, by combining the "genhdlist"
program (comes with the anaconda-runtime package) with a script run via NFS.
Once you have that, you only need to backup the actual data, not the
configuration (so the issue of trusting the backup goes away).

Of course, you'll need an RHCE who really knows his/her stuff to set it
up...

- 
John Airey, BSc (Jt Hons), CNA, RHCE
Internet systems support officer, ITCSD, Royal National Institute of the
Blind,
Bakewell Road, Peterborough PE2 6XU,
Tel.: +44 (0) 1733 375299 Fax: +44 (0) 1733 370848 John.Airey@...b.org.uk 

There is more historical evidence for the existence of Jesus Christ than for
either Henry VIII or Julius Caesar.

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