Solved

Prevent users from bypassing screensaver policy via REGEDIT

Posted on 2011-03-09
5
712 Views
Last Modified: 2012-08-14
We have a GPO that defines screen saver settings for our users, and prevents them from modifying those settings via the Windows GUI. However, some of our users have figured out that they can update the settings to those of their liking via REGEDIT.

We are looking for ways to prevent them from modifying these keys, or if this cannot be prevented, a mechanism to automatically revert the keys back to their original values if they are modified. We'd prefer not to use any third party software to do this. The keys in question are:

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Control Panel\Desktop]
"ScreenSaverIsSecure"="1"
"ScreenSaveActive"="1"
"SCRNSAVE.EXE"="Policy.scr"
"ScreenSaveTimeOut"="900"

Any suggestions would be appreciated.
0
Comment
Question by:TWCMIL
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 5

Assisted Solution

by:Stewart Beel
Stewart Beel earned 250 total points
ID: 35089412
In a GPO set the following to enabled:

User Configuration > Administrative Templates > System > Prevent access to registry editing tools

This will prevent users from being able to start regedit
0
 
LVL 1

Expert Comment

by:networkadminkjmc
ID: 35089967
also user permissions on the local machine,
0
 
LVL 24

Expert Comment

by:Awinish
ID: 35091608
Domain user should not be allowed to modify registry settings.
Block it using GPO.

http://www.ehow.com/how_6056513_disable-tools-per-group-policy.html
0
 
LVL 84

Accepted Solution

by:
oBdA earned 250 total points
ID: 35097092
By default (and for the obvious reasons), users are not allowed to write in the "...\policies\..." registry keys (just chekc the permissions on HKCU\Software\Policies - only Administrators and System have write access).
That means that your users are local administrators on their machines, and that means that you can't prevent them from doing what an administrator is supposed to do on a machine: anything they want.
Yes, you can block reg.exe and regedit.exe. It'll take them about half a day to figure out that the registry can be changed with a VB script.
The GPO will by default be reset about every 90 minutes. Hopefully, after changing the settings back manually often enough, they'll just get tired of it.
0
 
LVL 1

Author Closing Comment

by:TWCMIL
ID: 35238284
Thanks for the help, and sorry about the delay. Blocking the reg editing tools will help, but oBdA made a good point about Admin rights -- ultimately that is the issue we need to address.
0

Featured Post

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Always backup Domain, SYSVOL etc.using processes according to Microsoft Best Practices. This is meant as a disaster recovery process for small environments that did not implement backup processes and did not run a secondary domain controller that ne…
Auditing domain password hashes is a commonly overlooked but critical requirement to ensuring secure passwords practices are followed. Methods exist to extract hashes directly for a live domain however this article describes a process to extract u…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
This video shows how to use Hyena, from SystemTools Software, to update 100 user accounts from an external text file. View in 1080p for best video quality.

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question