alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Glupteba CnC Domain in TLS SNI"; flow:established,to_server; tls.sni; content:"myinfoart.xyz"; bsize:13; reference:md5,4cc43c345aa4d6e8fd2d0b6747c3d996; classtype:domain-c2; sid:2029751; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_30, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_03_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)