What is superior to AppLocker is Microsoft Defender Application Guard (MDAC). One of them being using regsvr32 to download and execute script directly from the internet for instance. As many security specialists have shown, there are numerous ways to bypass AppLocker and still get code to execute. Most customers that did not use AppLocker before Wannacry and other types of ransomware attacks are now using AppLocker to prevent malicious software to run on their Windows devices. This is a guide to get you started within an hour or two with what I call “AppLocker Deluxe” and that is Microsoft Defender Application Control, formerly known as Device Guard and up until recently Windows Defender Application Control ( WDAC). Forget AppLocker and all its weaknesses and start using Microsoft Defender Application Control for superior application whitelisting in Windand later. exe.msi,script AppLocker will block and you can confirm this on the event log AppLocker blocks the. I have copied 3 types of files (.exe, msi and script ) on user desktop for testing and also we will try to launch mstsc, cmd, powershell to confirm the AppLocker behavior Link the GPO to Computer OU where we have our VDIs Once the import is complete, right click on Applocker – select Properties and check Configured under All Rules as highlighted So now we have all the requirements, lets export this settings from Golden VM and we will create GPO using this settings and apply it to Computer OU where we have our VDIsĬreate a GPO and import the settings from previously exported AppLocker. Similarly for Windows Installer Rules and Script Rules In this lab I am also blocking mstsc, cmd, PowerShell which normally Security people doesn’t recommend to end users to have access. which typically doesn’t require admin rights so on Each Rule create a new Rule and Select Deny and choose the AD group to whom you want to block To block users from installing any apps(.exe.msi and script) like Firefox, chrome etc. Now we have rules for the installed applications so users can only run these applications When you click Next it will fetch all the installed application in that path and then click on Createĭo the same for Program Files(x86),Windows folder (default apps ) and include if you have specified any other custom location for installing appsįollow the same for Windows Installer rules and Script Rules and it will look as below after autmatic rule creation Select the path where we usually install applications ( Program file, Program Files(x86),Windows folder (default apps ) and include if you have specified any other custom location) On each Rules, right click and create Automatically generate Rules. Login to the base image and open GPO editor (gpedit.msc) and browse to Computer Configuration-Windows Settings-Security Settings-Application Control Policies-AppLockerĭelete default rules as highlighted from 3 highlighted Rules If you planning to apply AppLocker then Install all the required apps on Base/Golder image and follow the below steps on AppLocker please follow the below approach To avoid any issue related to blocking etc. So we can achieve this using AppLocker which is an inbuilt feature in windows 10īasically it allows administrators to control which files(.exe, msi, scripts) are denied or allowed to execute.Īpplying AppLocker policy should be planned carefully else you will end up in blocking many things which could be required for users. Firefox, chrome etc.) which typically doesn’t require admin rights and user can install on their profile. In a recent WVD deployment we had a requirements on blocking installation of some apps (ex.
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