alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed RMM Domain (tiflux .com) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".tiflux.com"; endswith; fast_pattern; reference:url,tiflux.com; reference:url,attack.mitre.org/techniques/T1219/; classtype:misc-activity; sid:2068026; rev:1; metadata:attack_target Client_and_Server, created_at 2026_03_05, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag RAT, tag RemoteAccessTool, updated_at 2026_03_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1219, mitre_technique_name Remote_Access_Software;)