alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Lumma Stealer Related Domain (ignoracndwko .shop in TLS SNI)"; flow:established,to_server; tls.sni; bsize:17; content:"ignoracndwko.shop"; fast_pattern; reference:md5,57a0c7fdeea82c3e1033171d29e03f18; classtype:domain-c2; sid:2055778; rev:3; metadata:tls_state TLSEncrypt, created_at 2024_09_09, deployment Perimeter, deprecation_reason Age, malware_family Lumma_Stealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2025_03_07, reviewed_at 2025_03_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)