![]() I’ll explain how to deploy with Microsoft System Center Configuration Manager (ConfigMgr) specifically. Since Windows 10 1703, a new option, known as the managed installer has been provided to automatically authorize applications deployed by a software deployment solution. Use ConfigMgr To Simplify WDAC Implementation Code signed applications therefore reduce the administrative overhead of WDAC implementation within the enterprise. This requires a change in WDAC policy to accommodate, whereas embedded signing usually does not require this change. The disadvantage of catalog signing from a WDAC perspective, however, is that catalogs need to be updated every time an application is updated. The latter method usually works well with unsigned Line of Business (LOB) applications, where embedded signing cannot be easily achieved. This is done either using embedded signing, where the signature is part of the binary, or via catalog signing, where a catalog file is generated for the application and is signed. WDAC policies identify trusted applications by their signing certificate. If further policies are created, then these need to be merged since only one WDAC policy is allowed per device. Rename the policy to SIPolicy.p7b and copy it to C:\Windows\System32\CodeIntegrity for testing in enforced mode.Delete the Audit Mode Enabled option from the policy so it becomes enforced, and test against a device.Deploy the policy against a device-in audit mode.Create a WDAC policy in PowerShell and execute against the device, in audit mode initially. ![]() Ensure the machine is free of viruses and malware.Build a reference machine with all the business’s applications installed.To implement WDAC in the enterprise, the following process needs to be implemented. No allowances here for application chaos. You must also have full control of deployment and management of your apps. Not only do you have to get to grips with the WDAC concepts and implementation, but you need to have a full understanding of your business’s application portfolio. This free community tool gives you all the information you need for unattended conversion using ConfigMgr. If you have systems running in legacy BIOS that are capable of running UEFI, you can automate the conversion. You will have to figure out which machines are capable of running WDAC, and decide what do about the rest. WDAC’s integration with hardware for security is a key reason why it is so powerful. Download the Microsoft TechNet documentation on WDAC and AppLocker in PDF format and you are presented with a whopping 273 pages of content to consume. WDAC is not a simple solution to implement, in comparison to many other Windows 10 security features. Use AppLocker to granularly fine-tune the restrictions.Enforce WDAC at the most restrictive, least privilege level.As a best practice, Microsoft recommends that admins: However, AppLocker can be used effectively to compliment WDAC, to allow the usage of different policies per user on the same device. A key difference is that AppLocker does not offer the chain of trust, from the hardware to the kernel, that WDAC offers. AppLocker also enables you to control which applications and files can run on your system. WDAC works in-conjunction with Secure Boot, to ensure that boot binaries and the UEFI firmware are signed and have not been tampered with.Ī common misconception is that WDAC is an AppLocker replacement. It also hardens the operating system against kernel memory attacks using virtualization-based protection of code integrity (HVCI). CI guarantees that only the trusted code runs from the boot loader onwards. WDAC restricts application usage via a feature called configurable code integrity (CI). Applications or drivers need to be specified as trustworthy, which reduces the threat of executable based malware significantly. WDAC, allows you to control your Windows 10 devices by creating policies that define whether a specific driver or application can be executed on a device. Implementing WDAC is a fundamental part of ensuring malicious software and drivers never run on a company’s endpoints. Windows Defender Application Control (WDAC), previously known as Device Guard, is a key one. Windows 10 has many innovative features to assist you with securing your device. What you can do is prevent malware from executing. Users should know better by now, but that’s out of your control. Symantec recently reported 71% of malware attacks start via spear phishing. Let’s hope malware never appears on computers you manage.
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