alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Redhive Staging Domain in TLS SNI (gitrm .sbs)"; flow:established,to_server; tls.sni; content:"gitrm.sbs"; endswith; classtype:domain-c2; sid:2072612; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_10_21, deployment Perimeter, confidence High, signature_severity Major, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_10_30, former_sid 2868996, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)