Intro I recently assisted a costumer with migrating to Defender for Endpoint. They had some windows 10/11 endpoints where the 3rd party Antivirus (AV) kept registered as primary Antivirus which by default put Defender for Endpoint in disable state on Windows 10/11: Together with the Internal system engineers we tested multiple uninstall packages/scripts provided by…
Intro Microsoft recently announced that device isolation exclusions in Defender for Endpoint are now generally available. This made me think about possible use cases for this new feature. Together with Bjorn Claes, we explored whether it’s possible to exclude the Intune wipe process from isolation mode. If this works, it would allow us to remotely…
Intro There are many helpful blog/videos posts about managing Microsoft Defender for Endpoint (MDE) updates on Windows, but there’s not much information available for MDE on Linux. In this blog post, I’ll share my experience with the product and how I usually recommend managing updates on Linux distributions. On Linux, MDE updates are managed via…
Intro This week I bumped into a problem that I had not experienced for several years at one of my customers. The customer was migrating from a 3rd-party EDR to Defender for Endpoint on their servers. During the onboarding they wanted to enable the Defender Antivirus server role and they run against the following error:…
What’s new:– Inspired by Yong Rhee “Resolving High CPU Utilization in MDE” session, added additional options to run the Performance analyzer, Overview is now by default.– Added ASR rules that went GA– Added a check if DeviceControl is enabled– Added Proxy ULR/PAC check– Added check to see if signature update are out of date Download:GitHub…
Intro While reviewing Defender for Servers and AMA agent implementations across various customers, I noticed that not all of them are following best security practices for Azure Arc deployments. In this blog, I want to highlight several security concerns and provide recommendations on how to mitigate them… Why should we care? The Azure Connected Machine…
Lately, I’ve been doing a lot of Defender for Endpoint deployment/configuration troubleshooting, which prompted me to dust off my MDE-Troubleshooter. I noticed it was missing some new and improved configurations, so I decided to update it. What’s new:– Updates with the new supported Attack surface reduction rules– File hash computation check– Run as admin check–…
I’m thrilled to share the launch of the new eBook, “Demystifying Microsoft Defender for Servers” by James Agombar 🎉 I had the pleasure of being a technical reviewer for this eBook, and I can confidently say it’s a valuable resource for anyone looking to enhance their knowledge of the product! This comprehensive guide provides a deeper understanding…
Intro This blog discusses a challenge I encountered with a client. They reached out for assistance in addressing issues during the deployment of Defender for Endpoint on Windows Server 2012 R2 and Windows Server 2016. Yes, despite being end-of-life (EOL), these operating systems are still in use. If you’re only interested in the solution, skip…
Intro I noticed that more and more clients are starting to use mixed license model for Defender for Servers. Previous you could only enable Defender for Server at the subscription level. Microsoft also noticed this and they made an option available to enable Defender for Servers at the resource level ! The ability to enable…