alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE go-titan Registration Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/register"; http.header_names; to_lowercase; content:"|0d 0a|x-mesh-auth|0d 0a|"; http.request_body; content:"|22|caps|22|"; content:"|22|hostname|22|"; content:"|22|p2p_port|22|"; content:"|22|v|22 3a 22|"; content:"|2d|go|2d|titan|22|"; fast_pattern; reference:url,securitylabs.datadoghq.com/articles/n4d-mesh-controller-go-titan-new-infrastructure-hunting/; classtype:trojan-activity; sid:2071722; rev:1; metadata:affected_product Linux, attack_target Client_and_Server, tls_state plaintext, created_at 2026_08_21, deployment Perimeter, malware_family go_titan, performance_impact Low, signature_severity Major, updated_at 2026_08_21, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)