Category Archives: Security

Automation, AzureAD, EMS, Intune, Powershell, Security

Devices that lack a bitlocker recovery key in AzureAD

10 Comments

With Intune’s new Bitlocker Encryption Report administrators have an effective way of seeing which of their devices have been encrypted.

But if we want to know if we can actually recover the bitlocker key of a device, we need to know if it was ever uploaded to AzureAD.

Network or local device issues can sometimes prevent the recovery key from reaching AzureAD, resulting in lost data if the device’s disk needs to be recovered for any reason. To hunt down devices that have not escrowed their recovery key to AzureAD, you can use my report function (in PowerShell as always):

GitLab source download link

Automation, Azure, Powershell, Security

Full AzureAD Applications Permission overview

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So you’d like to know which applications are living in your AzureAD?

And you’d like to know which of those were added by your admins, and what permissions those applications have?

And you’d also like to know which applications your users are consenting to, and what rights those applications have on your users?

Look no further, I wrote a script to export all of that to Excel for you!

Application overview

Apps an admin has consented to and the type of rights it needs

Apps a user has consented to and the type of rights it needs

Apps to user mapping, for an easy overview of which user has consented to which app

Get it at:

Credits to Doug Finke for the Excel module I’m using!

 

Azure, Powershell, Security

Retrieving ALL Azure AD registered applications that Get-AzureRMAdApplication does not return

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The Microsoft supplied Get-AzureRMADApplication Powershell cmdlet does not return all applications you can see in the Enterprise Applications and App registrations blades in Azure AD.

In addition, Get-AzureRmAdApplication also does not return information such as:

  • Publisher Name
  • logoUrl
  • tags
  • enabled/disabled status
  • if it is a MicrosoftFirstParty application

So, here’s a custom PS function to help you out: https://gitlab.com/Lieben/assortedFunctions/blob/master/get-azureRMADAllApplications.ps1

It requires a special token generated by my get-AzureRMtoken function to log in.

As usual when using unsupported API’s, be careful!

Azure, CSP, Powershell, Security

CSP delegation on non CSP azure subscriptions

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If you’re a Cloud Solution Provider and you supply a CSP azure subscription to that tenant, your AdminAgents will have Owner access to that subscription by default. Lets say the customer also has an existing subscription (maybe a non-profit donation?).

When you add your accounts as Owner to the existing tenant’s (non-csp) subscription, your users are added as Guest accounts in the customer’s Azure AD. This removes the delegated CSP rights on the CSP subscription because the references to foreign accounts break due to the new guest accounts having the same UPN.

So, alternatively, use

Get-AzureRmRoleAssignment -Scope "/subscriptions/<CSP SUBSCRIPTION ID>

on the CSP subscription to get the Foreign Principal ID for your own tenant. Then use

New-AzureRMRoleAssignment -ObjectId <FOREIGN PRINCIPAL ID> -Scope "/subscriptions/ 
<EXISTING SUBSCRIPTION ID>" -RoleDefinitionName Owner

to add the foreign principal ID to the existing customer subscription to get delegated access 🙂

 

Automation, EMS, Intune, Powershell, Security

Automatically bitlocker Windows 10 MDM Intune Azure AD Joined devices

13 Comments

Update: in recent builds of Windows the BackupToAAD-BitLockerKeyProtector PowerShell command does most of what this used to do 🙂

I recently ran into an article by Pieter Wigleven, based on an original idea of Jan Van Meirvenne that I simply have to share, and expand upon.

When you go cloud first, and do light MDM management of your Azure AD Joined Windows 10 devices, you will likely enable a Bitlocker policy in Intune. What you’ll quickly discover, is that your policy will not automatically enforce/enable Bitlocker on non-InstantGo capable devices.

So, I expanded upon Jan and Pieter’s script to automatically enable Bitlocker on Windows 10; it has additional error handling, local logging and it will eject removable drives prior to immediately (vs reboot) encrypting your system drive. After this is started, it will register your recovery key in AzureAD. Of course all credit for the original idea goes to Jan van Meirvenne.

Powershell source file

enableBitlockerAndRegisterInAAD_v0.04.ps1 (right click, save as)

MSI file

enableBitlockerAndRegisterInAAd_v0.04.msi (right click, save as)

As Intune won’t let you deploy a Powershell script, I’ve also wrapped the script in an MSI file with Advanced Installer for you. What this will do;

  1. Deploy the PS1 file to the machine
  2. Register a scheduled task to run this PS1 file at logon each time
  3. Kick off the scheduled task once so a first reboot isn’t required

Advanced installer package (.aip)

enableBitlockerAndRegisterInAAD.zip (right click, save as)

Requirements

  1. Windows 10, AzureAD Joined
  2. TPM chip
  3. User should be local admin