Posts

Showing posts with the label Endpoint Security

Configuring Intune Permissions in Defender Portal for Endpoint security

Image
When it comes to implementing least privilege model for Intune permissions, the most common way is to use the role-based access control (aka RBAC). As a focus for this article, I wanted to touch upon the permissions required for managing endpoint security related settings in Intune, but configured using Defender. Consider a scenario where security and endpoint teams are different. While Endpoint team will normally focus on the administration of managed enterprise devices using Microsoft Intune admin center, security analysts will focus on security aspect of resources using the Defender portal. The real challenge comes, when the two roles start to merge or overlap. This is where strong governance for access permissions can play a crucial role. While implementing RBAC in the respective administration portals is the recommended way to address this, in the off chance that an organization has not implemented this, the relevant permissions, for endpoint security in Intune in particular, can ...

The curious case of Defender ASR rules not enforcing from Intune

Image
  It was a cold gloomy day when I set out on a mission to fix an issue involving ASR rules. Something which I may have done a dozen of times so I said to myself, why it should be any different this time. But if history has taught me anything, it is that no two issues are the same, despite how much they resemble and that for every issue there is a possible solution. You just have to stay relentless and you will eventually make it to the other side. The issue.. It all began with the ASR rules in 'block mode' starting to block macros on a set of devices. Pretty routine at this stage as the logical thing to do is either to configure necessary exclusions or put the relevant ASR rule in a non restrictive state like 'Audit' mode. The problem is that no matter what changes I made to the ASR rules, they simply didn't make any difference. Macros continued to be blocked and the events in Advanced hunting would confirm the same. When I checked the registry on the devices in que...

What is scanAvgCPULoadFactor in Microsoft Defender Antivirus and when can it get ignored?

Image
If you manage Windows Defender AV settings, then you probably would have come across scanAvgCPULoadFactor in same shape or form. In Intune, the setting is called ' Avg CPU Load factor ' which is based of the same setting available in the GPO admx template. ' Avg CPU Load factor ' is used to specify the maximum percentage of CPU usage for a scan. The acceptable values for this parameter are: integers from 5 through 100, and the value 0, which disables CPU throttling. Windows Defender does not exceed the percentage of CPU usage that you specify. The default value is 50. While working on an implementation project for Defender for Endpoint, the customer pointed out to me that they were noticing some performance issues after onboarding to Defender for Endpoint and it was soon concluded that the issue could be due to AV scan configuration settings.  According to Microsoft  - It is not a hard limit but rather a guidance for the scanning engine to not exceed this maximum on ave...

Windows LAPS with Microsoft Entra (Azure AD) and Microsoft Intune

Image
  As of writing this blog, Microsoft have released Windows LAPS for both Azure AD joined and hybrid Azure AD joined devices. An official Cloud LAPS solution has been long awaited and it is finally here. While still in Public preview, it is a good time to test the feature. I tested the solution in my tenant and captured the relevant bits. Check it out. First of all, lets see what the current requirements are - Supported Azure Regions - -Azure Global -Azure Government -Azure China 21Vianet Operating system updates that are currently needed - This feature is now available on the following Windows OS platforms with the specified update or later installed: -Windows 11 22H2 - April 11 2023 Update -Windows 11 21H2 - April 11 2023 Update -Windows 10 20H2, 21H2 and 22H2 - April 11 2023 Update -Windows Server 2022 - April 11 2023 Update -Windows Server 2019 - April 11 2023 Update Device identities that are supported - - Azure AD joined - hybrid Azure AD joined devices only. Note: Azure AD re...