What does the AppLocker Method=Hash do?

The AppLocker Method=Hash is designed to maintain a high level of security by ensuring that only applications whose cryptographic hash matches a pre-recorded value are allowed to execute. When an application is approved through this method, AppLocker stores the hash of the application at the time the rule was created. During subsequent executions, the current hash of the application is compared to the recorded hash.

This verification process helps protect against modifications to the application. If an application’s hash changes due to tampering or unauthorized updates, AppLocker will deny execution, thereby maintaining the integrity of the application environment.

The other methods do not focus on verifying the integrity in this specific manner. For instance, methods based on the file name may not offer the same level of security since a file could be renamed while the content remains unchanged. Methods that block applications entirely do not allow for any execution, and methods that remove any checks do not align with the intent of controlling application execution securely. Thus, utilizing the hash method allows for a level of scrutiny that enhances security postures concerning application management.