If AppLocker is used, it is configured through group policy in Computer Configuration > Windows Settings > Security Settings > Application Control Policies > AppLocker. AppLocker is a whitelisting application built into Windows Server. As for AppLocker policy to be enforces on a computer the Application Identity service must be running, lets add to the Applocker GPO the enabelment of the. You can access Windows AppLocker through the PC’s local security policy. You can see what this looks like in Figure 1. Implementation guidance for AppLocker is available in the NSA paper "Application Whitelisting using Microsoft AppLocker" at the following link:Ĭonfigure an application whitelisting program to employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs.Ĭonfiguration of whitelisting applications will vary by the program. Once the Local Group Policy Editor opens, navigate through the console tree to Computer Configuration Windows Settings Security Settings Application Control Policies AppLocker. This will produce an xml file with the effective settings that can be viewed in a browser or opened in a program such as Excel for review. Get-AppLockerPolicy -Effective -XML > c:\temp\file.xml 1, In the Local Group Policy Editor snap-in, navigate to Local Computer Policy > Computer Configuration > Windows Settings > Security Settings >. If the AppLocker PowerShell module has not been imported previously, execute the following first:Įxecute the following command, substituting with a location and file name appropriate for the system: If AppLocker is used, perform the following to view the configuration of AppLocker: A deny-by-default implementation is initiated by enabling any AppLocker rules within a category, only allowing what is specified by defined rules. If an application whitelisting program is not in use on the system, this is a finding.Ĭonfiguration of whitelisting applications will vary by the program.ĪppLocker is a whitelisting application built into Windows Server. Verify the operating system employs a deny-all, permit-by-exception policy to allow the execution of authorized software programs. This is applicable to unclassified systems. Windows Server 2019 Security Technical Implementation Guide The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whitelisting. The organization must identify authorized software programs and only permit execution of authorized software. Using only authorized software decreases risk by limiting the number of potential vulnerabilities. Using a whitelist provides a configuration management method to allow the execution of only authorized software.
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