alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SmugX Domain (newsmailnet .com) in TLS SNI"; flow:established,to_server; tls.sni; bsize:15; content:"newsmailnet.com"; fast_pattern; reference:url,research.checkpoint.com/2023/chinese-threat-actors-targeting-europe-in-smugx-campaign/; classtype:trojan-activity; sid:2046805; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_07_11, deployment Perimeter, malware_family SmugX, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_07_11;)