This detection rule identifies attempts to disable the Tamper Protection feature of Windows Defender by monitoring changes to the Windows Registry that relate to this setting. Tamper Protection is a vital security feature that helps prevent unauthorized changes to security settings and ensures that the antivirus engine is operating as intended. The rule is based on detecting a specific entry in the Windows Registry where the Tamper Protection flag is set to a value that disables it (DWORD 0x00000000). By observing registry changes, the rule triggers an alert when the specified condition is met, helping security teams respond quickly to potential threats that may seek to evade detection by turning off key security mechanisms. Filters are also in place to avoid false positives from legitimate operations performed by the Windows Defender service.