alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO URL Shortener Service Domain in TLS SNI (reurl .cc)"; flow:established,to_server; tls.sni; bsize:8; content:"reurl.cc"; fast_pattern; classtype:misc-activity; sid:2063186; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_06_25, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2025_06_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1189, mitre_technique_name Drive_by_Compromise;)