This detection rule identifies the installation of Chrome VPN extensions on Windows through certain registry entries. It specifically looks for modifications in the registry that indicate the presence of Chrome extensions related to VPN functionality. The key registry paths monitored include `Software\Wow6432Node\Google\Chrome\Extensions`, focusing on the 'update_url' entry, which typically specifies where the extension can automatically update from. The rule uses a list of known Chrome VPN extension IDs to filter those specifically related to VPNs. The entire detection rule is set to trigger when all conditions associated with Chrome extensions are met, and it is classified as a high-level threat due to the potential implications of unauthorized VPN usage on a corporate network, such as bypassing security protocols or masking malicious activity.