![]() Microsoft Defender External Attack Surface Management.Microsoft Defender Cloud Security Posture Mgmt.Microsoft Defender Vulnerability Management.Azure Active Directory part of Microsoft Entra.The exercise illustrated the benefit of Credential Guard in Windows Server 2016 as well as Windows 10. Step 37 to 43 goes further to use Mimikatz to show the hash in Lsass is now encrypted using Credential Guard. Step 25 to 36 illustrate the steps to configure credential guard, then verify its status using msinfo32.exe and PowerShell. But using the hash of the LabAdmin, an attacker will be able to do it using the information retrieve from Lsass memory. Open remote PowerShell connection to a domain controllerīoth operations could not be performed by the logon user.In step 14 to 24, you will extract LabAdmin hash from lsass using Mimikatz, and use the hash to open a PowerShell console, and perform a couple of operations using the LabAdmin privilege: Pass the hash is a hacking technique that allows an attacker to authenticate by using the underlying NTLM, instead of specifying the user password. The tool has been copied to the lab machines, step 9-13 walk you through the process of dumping lsass memory using Mimikatz. Mimikatz is a popular tool for retrieving lsass memory information. In order to demonstrate an attacker gaining user access using other account’s hash, the first part of the lab is to simulate a server which has been running for a while, different users had remotely or locally connected to it, therefore, lsass memory stored many different user credential information. In this lab environment, all the virtual machines start at the time lab launches, when you logon to the machine, you will only have the logon user credential information in memory. The memory is cleared when the machine starts up. Lsass.exe is the process which handles user logon, it stores the user credential information in its memory. You can follow the steps listed under the content section to complete the lab, the intent of the blog, is to break the procedures into groups, to help you understand the exercise better. Verify the hash in memory is protected using Credential Guard.Understand how attackers can use the hash in memory to gain access to domain controllers.This lab is structured to cover the following in sequence: The steps are listed in the Content section: SRV01 and SRV02: both are Windows Server 2016, and used for the lab exercise.DC: domain controller, which is not used for this exercise.It takes a few minutes to create the VMs, and once it has done, you will see the following machines prepared: This blogpost will walk you through the Credential Guard lab details.Īfter click on the link of Breach Resistance lab, you be required to sign in and then you can launch the lab: There are 3 exercises in the “Implementing Breach Resistance Security in Windows Server 2016”: The link will lead you to a sign up page, after that, you will see the following labs listed for Windows Server 2016: If you have heard about Credential Guard in Windows Server 2016 (and in Windows 10), but do not have an environment to try it out, here is a lab environment we built for you to play. Microsoft, I and probably many others would like an actual method of fixing this from an actual person for this problem. Even an answer saying to close the task and restart the person's computer when in their question they stated that they couldn't close the task and restarting didn't fix it. They also say to close it, which again, doesn't work, as you can close Runtime Broker but not System Guard Runtime Monitor. Often people have been saying to close the Runtime Broker even though this is a different program and I have not had any problems with it. I have seen this problem in many other forum posts, all of which have incorrect answers that "fix" the wrong problem or don't work at all. I can't even change its priority in the details menu of the task manager because I again get an "access denied" message. I can't click end task on it, it says "access denied", if I restart it stays at a few MB for about 5 minutes then shoots back up to hundreds of MB or even a few thousand. I have 16 Gigabytes of RAM along with 25 Gigabytes of vRAM, this single program manages to sometime use 20% of that. System Guard Runtime Monitor Is using absolutely insane amounts of ram.
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