alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed DeerStealer Domain (updater-pro .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".updater-pro.com"; endswith; fast_pattern; reference:url,x.com/anyrun_app/status/1814214775489880271; classtype:trojan-activity; sid:2055028; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_08_07, deployment Perimeter, confidence High, signature_severity Major, updated_at 2024_08_07, reviewed_at 2025_04_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)