alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Unk.PowerShell Loader CnC Domain in TLS SNI"; flow:established,to_server; tls.sni; content:"internationalrule.com"; bsize:21; reference:url,app.any.run/tasks/9b18c721-13b2-4151-9a1d-22b5c8478ad4; classtype:domain-c2; sid:2029325; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_29, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_10_27, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)