AppLocker whitelists applications by creating rules that specify which files are allowed to run. One of the primary methods for specifying these rules is through the use of Path Rules. Path Rules allow administrators to specify an allowed file or folder path, and any application within that path is permitted to run. This method is particularly useful for allowing applications from a known directory while blocking others that are not explicitly approved.
References: The official Microsoft documentation explains that AppLocker functions as an allowlist by default, where only files covered by one or more allow rules are permitted to run. Path Rules are a fundamental part of this allowlisting approach1. Additionally, other resources like security guidelines and best practices for Windows reinforce the use of Path Rules as a method for application whitelisting within AppLocker2
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