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Block Access to Administrative Apps like the Command Prompt In Intune.

This blog will be about how to block access to the CMD, PowerShell, and registry tools within a few seconds!

I will divide this blog into multiple parts

  1. Why you want to block PowerShell
  2. Searching in the Intune for Education Portal

1. Why you want to block PowerShell

There are many reasons for IT pros to allow those administrative tools like PowerShell, but I am not one of them. Please take a look at my blog to learn about the “why” and the “how”

2. Searching in Intune for Education Portal

Unfortunately there is no simple GUI option to block the Command Prompt/Windows Powershell and Regedit in Intune Guess what? That’s wrong.

You can make sure these apps can be denied. To do so, open the Education Education Intune portal instead of the normal Intune portal.

https://intuneeducation.portal.azure.com/

And click on: Groups –> All Devices (or create a custom group) –> Settings –>Windows Device Settings –> Apps –> Block Access to Administrative Apps

Guess what it does? It just creates a pre-build custom Applocker policy in your normal Intune Portal, nothing more!

Looking at the Applocker policy and the OMA-URI you will notice it uses the Applocker CSP

./Vendor/MSFT/AppLocker/ApplicationLaunchRestrictions/IntuneEdu/EXE/Policy

Let’s open the XML config, you will notice it blocks the apps with a FilePublisherCondition and allows the all the other executables. The link to the XML config (converted it to txt)

https://call4cloud.nl/wp-content/uploads/2020/06/blockapps.txt

Testing it from a client. You will get an Applocker Notification, the App has been blocked.

This is a nice Appocker policy to start with! but if you want to expand it you could take a look at this blog

Conclusion:

It’s nice to see there is a nice GUI to implement a simple Applocker policy to block these Administrative Apps. Of course, it’s much better to create a complete Applocker policy to prevent ransomware infections and blocking other Exe files. It is a perfect solution to start with, and with a deep impact!

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16 thoughts on “Block Access to Administrative Apps like the Command Prompt In Intune.

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  3. Pingback: Blocking administrative Tools part 2 - Call4Cloud
  4. Hi,
    I tried your solution: I created a new group and blocked CMD, Powershell and Regedit.
    But there was no Applocker policy in my regular Intune. Any idea what might have gone wrong? I waited like 15 minutes. But no result.
    Thanks

  5. We have varying results with this – it blocks the apps for some users, and for others they can still run the apps. Local security policy shows no AppLocker rules in it on all machines. Recreated the policy and the group for membership and the same behavior. Anyone seeing this?

    1. Hi, to get some troubleshooting done, I am afraid I will need to have some more information.Can you look into the c:\windows\system32\applocker\mdm folder if there are rules created? Also checking the mdm intune registry keys.

  6. Hi, this for work for us.
    But when we launch a batch from Intune on the computers, it does not run and we need the batches to run.

    1. Hi David,

      It depends on what is in your batch file. Just like the problem with PowerShell, you could convert the batch file to an exe file. The exe file location in intune is allowed by default in the applocker policy.
      If you could tell me what’s in the batch file, i can take a look on how to solve it with Intune and still keep blocking the command prompt etc

      1. Hi,

        The batches that we launch are win32 intune programs, with cmd and .bat files, as well as powershell scripts.

        Thanks.

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  8. No Applocker policy in my regular Intune
    Not work for us. checked the following
    c:\windows\system32\applocker\mdm and the policy is there but it is no blocking cmd, powershell or regedit.

    Any help would be appreciated

    1. Hi,

      Did you create the applocker policy manaually? or did you switch the flip in the intune portal for education so it will also popup in your regular intune tenant?

  9. This helps with .exe applications but what if you need to stop the run.exe command?
    This does not work. I’ve added it but the win+r still works.

    1. run.exe? Normally I would block the use by configuring a settings catalog in intune and configuring : Remove Run menu from Start Menu (User)

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