Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Patchwork Domain (centling .nihaoucloud .org in TLS SNI)"; flow:established,to_server; tls.sni; bsize:24; content:"centling.nihaoucloud.org"; fast_pattern; reference:url,www.ctfiot.com/193014.html; classtype:trojan-activity; sid:2054512; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_07_16, deployment Perimeter, confidence High, signature_severity Major, tag Patchwork, updated_at 2024_07_16, reviewed_at 2025_05_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)