alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed VikroStealer CnC Domain in TLS SNI"; flow:established,to_server; tls.sni; bsize:18; content:"tracksupporte.site"; reference:md5,851c42ec4709bd59d7610591fc38129a; classtype:domain-c2; sid:2030381; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_06_23, deployment Perimeter, malware_family VikroStealer, confidence High, signature_severity Major, updated_at 2024_03_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)