This detection rule focuses on identifying the action of disabling Potentially Unwanted Application (PUA) protection in Windows Defender. PUA protection helps prevent the installation of applications that may not be technically malicious but could disrupt users' systems or lead to unwanted behavior. In this context, monitoring changes in the Windows Registry is critical, as configurations related to security software are often stored there. The specific registry path monitored by this rule is \Policies\Microsoft\Windows Defender\PUAProtection, and a DWORD value of 0 (0x00000000) signals that the PUA protection feature has been turned off. This rule is important for maintaining endpoint security and ensuring that users do not unintentionally expose their systems to threats consented via unwanted applications. It captures the high-level actions that could potentially open an avenue for attack under the defense evasion tactics. The effectiveness of this rule is contingent upon real-time monitoring of registry changes, which is imperative for swift incident response.