Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Lumma Stealer Related Domain (grassytaisol .shop in TLS SNI)"; flow:established,to_server; tls.sni; bsize:17; content:"grassytaisol.shop"; fast_pattern; reference:md5,c5726a8d71e24ffdc06a505eeece3604; classtype:domain-c2; sid:2054682; rev:3; metadata:tls_state TLSEncrypt, created_at 2024_07_26, 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;)