![]() ![]() Understanding the path rule condition in AppLocker.Understanding the publisher rule condition in AppLocker. ![]() The three primary rule conditions are publisher, path, and file hash. Primary conditions are required to create an AppLocker rule. Rule conditions are criteria that the AppLocker rule is based on. Understanding AppLocker rule condition types The file must be signed.Ī path condition on a rule controls whether a user or group can run files from within a specific directory or its subdirectories.Ī file hash condition on a rule controls whether a user or group can run files with matching encrypted hashes.Īn AppLocker rule collection is a set of rules that apply to one of the following types: executable files, Windows Installer files, scripts, DLLs, and packaged apps. ![]() There are three different types of conditions that can be applied to rules:Ī publisher condition on a rule controls whether a user or group can run files from a specific software publisher. A packaged app and packaged app installer rule controls whether a user or group can run or install a packaged app.A DLL rule controls whether a user or group can run files with a file name extension of.A Windows Installer rule controls whether a user or group can run files with a file name extension of.A script rule controls whether a user or group can run scripts with a file name extension of.com file name extensions and apply to applications. An executable rule controls whether a user or group can run an executable file.Rules apply to five different types, or collections, of files: Understanding AppLocker rulesĪn AppLocker rule is a control placed on a file to govern whether or not it's allowed to run for a specific user or group. ![]() For other file types, the AppLocker policy is read every time a SaferIdentifyLevel call is made. Whenever a new policy is applied, appid.sys is notified by a policy converter task. The rule condition containing the appid attributes.įor example, an SDDL for a rule that allows all files in the %windir% directory to run uses the following format: XA FX AU (APPID://PATH = "%windir%\*").Īn AppLocker policy for DLLs and executable files is read and cached by kernel mode code, which is part of appid.sys.(The default is the authenticated user SID, or "AU" in SDDL.) The user security identifier (SID) that this rule is applicable to.Either an allow or a deny ACE ("XA" or "XD" in security descriptor definition language (SDDL) form).Each rule is stored as an access control entry (ACE) in the security descriptor and contains the following information: It uses file path, hash, or fully qualified binary name attributes to form allow or deny actions on a rule. The Application Identity service returns the information from the binary -even if product or binary names are empty- to the results pane of the Local Security Policy snap-in.ĪppLocker policies are stored in a security descriptor format according to Application Identity service requirements. If the service isn't running, policies won't be enforced. The AppLocker policy is enforced on a computer through the Application Identity service, which is the engine that evaluates the policies. When applied, each rule is evaluated within the policy and the collection of rules is applied according to the enforcement setting and according to your Group Policy structure. How policies are implemented by AppLockerĪppLocker policies are collections of AppLocker rules that might contain any one of the enforcement settings configured. This topic for the IT professional describes the process dependencies and interactions when AppLocker evaluates and enforces rules. Learn more about the Windows Defender Application Control feature availability. Some capabilities of Windows Defender Application Control are only available on specific Windows versions. ![]()
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