This detection rule aims to identify when the Hypervisor Enforced Code Integrity (HVCI) feature is disabled on a Windows system by monitoring changes to specific registry keys. Specifically, the rule looks for modifications to the registry key associated with HVCI, namely the 'HypervisorEnforcedCodeIntegrity', where the 'Enabled' value is set to 0, indicating that HVCI is turned off. Disabling this feature poses a significant security risk as it allows unauthorized and potentially malicious code to be executed in kernel mode, making the system vulnerable to various forms of attacks, particularly those using unsigned and untrusted code. The detection leverages the registry_set log source and is categorized under 'attack.defense-evasion', related to techniques that aim to evade detection by disabling security features. To use this rule effectively, security professionals should ensure comprehensive monitoring of registry changes and correlate these findings with abnormal system behavior that may indicate compromise.