alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE GateSentinel C2 RemoteTool Task (command)"; flow:established,to_client; http.response_body; content:"|3c 21 2d 2d 1d|"; startswith; reference:url,github.com/Waremderme/GateSentinel-C2-RemoteTool; classtype:trojan-activity; sid:2072115; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_09_21, deployment Perimeter, malware_family GateSentinel, malware_family PATCHCORD, confidence High, signature_severity Major, tag c2, updated_at 2026_09_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)