alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed HailBot Domain (sfdopospdofpsdo .dyn in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".sfdopospdofpsdo.dyn"; endswith; fast_pattern; reference:url,nsfocusglobal.com/mirai-botnets-new-wave-hailbot-kiraibot-catddos-and-their-fierce-onslaught/; classtype:trojan-activity; sid:2050062; rev:2; metadata:attack_target Networking_Equipment, created_at 2024_01_12, deployment Perimeter, malware_family Mirai, malware_family hailBot, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_01, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)