[gptalk] Re: Office Blockage...

  • From: "Darren Mar-Elia" <darren@xxxxxxxxxx>
  • To: <gptalk@xxxxxxxxxxxxx>
  • Date: Thu, 24 Jul 2008 08:51:52 -0700

You might want to try enabling SRP logging. This log can tell you precisely
which rule is blocking a particular code execution when it happens. You can
enable this using my free gpolog.adm file (http://www.gpoguy.com/gpolog.htm)
or its described in the MS KB (though I can't find it at the moment). 

Darren

-----Original Message-----
From: gptalk-bounce@xxxxxxxxxxxxx [mailto:gptalk-bounce@xxxxxxxxxxxxx] On
Behalf Of Deepu
Sent: Wednesday, July 23, 2008 9:24 PM
To: gptalk@xxxxxxxxxxxxx
Subject: [gptalk] Re: Office Blockage...

Hi Darren,

Thanks for such a good reply. I really appreciate the solution 
which you provided. Related to our matter, i haven't deleted 
anything in the setting and the settings for program files and 
windows key are still there. Even after removing vbs and cmd, i am 
not able to run vb scripts...

So, this is the main problem with this. And regarding the third 
party software, we are not allowed to do so...

Thanks again for the reply...
Thanks & Regards...
Deepak Kumar...


On Wed, 23 Jul 2008 Darren Mar-Elia wrote :
>Deepu-
>You will be hard pressed to find a perfect solution for every 
>scenario you
>have. Security is a combination of elements. You need to ensure 
>first that
>users are not administrators on their workstations. Next, you 
>need to ensure
>that the file system and registry are as secure as possible, so 
>that it is
>difficult for the user to move things around or change things to 
>their
>liking. Finally, you need to control what code is installed and 
>run on a
>system. Each of these lines of defense requires a fair bit of 
>work and even
>then, if your users need to run a lot of applications as a 
>function of their
>job, you will find it hard to reach your goal.
>
>But, for the purposes of this discussion, let's try to get you 
>closer. First
>off, is cmd.exe allowed to run? If not, then scripts won't run. 
>Also, when
>you create SRP policy, MS adds some default registry path rules 
>that
>basically allow core Windows components and anything in Program 
>Files to
>run. Did you leave those rules in place or delete them?
>
>If you want to control what the user can run, but, as you say 
>below, "it's
>not feasible to block all exe's as user may have to install some 
>files or
>they may need some exe to run externally..." then you are 
>cross-purposes to
>your goal. If the user can install code willy-nilly and that's 
>ok, then you
>will never be able to successfully control what they can do.
>
>At this point, you might want to look into 3rd party products 
>that perhaps
>have more flexibility than SRP. For example, while I haven't used 
>it, I know
>that Bit9 (www.bit9.com) helps in this area.
>
>
>Darren
>
>
>
>-----Original Message-----
> From: gptalk-bounce@xxxxxxxxxxxxx 
>[mailto:gptalk-bounce@xxxxxxxxxxxxx] On
>Behalf Of Deepu
>Sent: Wednesday, July 23, 2008 10:47 AM
>To: gptalk@xxxxxxxxxxxxx
>Subject: [gptalk] Re: Office Blockage...
>
>Hi Darren,
>
>Even after removing the vbs and cmd extension. We can't run cmd
>files.
>
>Let's assume even if starts working. it's not feasible to block
>all exe's as user may have to install some files or they may 
>need
>some exe to run externally...
>
>So using this method will be a problem for us...
>
>Also let me know why the script is not running even after 
>removing
>the cmd and vbs extension...
>
>Thx...
>
>
>
>On Wed, 23 Jul 2008 Deepu wrote :
> >Hi Darren,
> >
> >I have even tried the whitelist mode. But doing so blocks all 
>exe
> >and even it doesn't allow to run vbs (scripts) which are
> >necessary to run.
> >
> >There may be some exe's which user should run.. So, allowing 
>this
> >policy doesnot works...
> >
> >Thanks...
> >
> >------------------------------------------------------
> >
> >On Wed, 23 Jul 2008 Darren Mar-Elia wrote :
> >>Deepak-
> >>Have you considered using Software Restriction Policy in
> >>whitelist mode?
> >>That is, set the default level to disallowed and then only 
>allow
> >>a specified
> >>pre-approved set of executables?
> >>
> >>Darren
> >>
> >>-----Original Message-----
> >> From: gptalk-bounce@xxxxxxxxxxxxx
> >>[mailto:gptalk-bounce@xxxxxxxxxxxxx] On
> >>Behalf Of Deepu
> >>Sent: Wednesday, July 23, 2008 7:39 AM
> >>To: gptalk@xxxxxxxxxxxxx
> >>Subject: [gptalk] Office Blockage...
> >>
> >>Hi Friends,
> >>
> >>I am in a great problem. I would really appreciate if anyone
> >>can
> >>help me at the earliest:
> >>
> >>Problem: I want to block some executables like access.exe,
> >>publisher.exe and communicator.exe using group policy.
> >>
> >>Now the problem is i can't use Software Restriction Policy
> >>using
> >>hash rule as the hash will change everytime microsoft 
>patches
> >>or
> >>release service pack for office 2007.
> >>
> >>Secondly if i use Software Restriction Policy using path 
>rule.
> >>The
> >>user can simply copy the exe to alternate location and can 
>run
> >>the
> >>program with ease.
> >>
> >>So,i would really appreciate if anyone can help me to solve
> >>this
> >>issue, as the user can't open the above mentioned exe from
> >>anywhere. I want to implement it using group policy. A 
>custom
> >>ADM/ADMX will also work... Please guide me if possible...
> >>
> >>Waiting for your reply...
> >>Deepak Kumar...
> >>India...
> >>
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