alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Chrysalis Backdoor CnC Domain in TLS SNI (wiresguard .com)"; flow:established,to_server; tls.sni; bsize:14; content:"wiresguard.com"; fast_pattern; classtype:domain-c2; sid:2067293; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, affected_product Windows_8, affected_product Windows_10, affected_product Notepad__, attack_target Client_Endpoint, created_at 2026_02_04, deployment Perimeter, malware_family Chrysalis, confidence High, signature_severity Major, tag Backdoor, tag c2, updated_at 2026_02_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)