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Monitoring NT registry and event log changes

Posted on 1998-02-22
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Last Modified: 2013-12-04
I need to know if there have been any changes to the Windows NT registry or event log since I started running a process. Is there any way I can do this simply ? What I would like to do is to get a handle to the registry and a handle to the event log. These handles would somehow know when there were changes which I could wait for. Any ideas ?
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Question by:shimon_crown
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by:jhance
ID: 1411457
Define "do this simply".  

There is no automatic NT function which "watches" the event log and registry for changes.  You will need to write functions to check the state of the registry keys you are interested in and the last line of the event log when your app starts up and save those items away somewhere.  Then when you need to do your check, go back and compare your original state to the current state.
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by:shimon_crown
ID: 1411458
This is the difficult way I had already thought of !! Does anybody else out there have an idea.
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by:alexo
ID: 1411459
The is a program that does what you need.
available (with source) from http://www.ntinternals.com/ntregmon.htm

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Expert Comment

by:jhance
ID: 1411460
alexo,

NTREGMON is NOT what he needs.  I think you should read the description of the program.  NTREGMON is a utility which will intercept registry calls and display (as they happen) registry calls in the system.  Doing what it does is even more difficult that what shimon_crown asked for and still doesn't tell if something has changed, it just reports activity.
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Author Comment

by:shimon_crown
ID: 1411461
I think that NTREGMON may be the right direction. While it does give a lot more information than I ask I shall have to look at the source code to see if it is simpler than jhance's suggestion.

BTW by simple I meant not having to know the keys in advance.

Thanks for your help. I shall e-mail the winner so he can re-enter his answer for the points.

I am still open to more suggestions on this point.

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by:jhance
ID: 1411462
So let me get this straight.  You are looking for a "simple" way to determine if ANY registry key has changed from some start time until you check it?  It that right?
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Author Comment

by:shimon_crown
ID: 1411463
Exactly. This is a medical application and the customer is insistent that the registery is untampered.
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by:jhance
ID: 1411464
You got to bound this in some way.  NT changes registry keys all the time in the normal course of running itself.
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Accepted Solution

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tflai earned 200 total points
ID: 1411465
Get NTRegMon from "www.ntinternals.com".  It comes with complete source code also.
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by:tflai
ID: 1411466
By the way, NTRegMon is a GUI/device driver combo that hooks to system call to watch all registry-related activies.
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by:alexo
ID: 1411467
Hmmm... isn't the accepted answer identical to what I have suggested (third entry from the top)?

Just curious...

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