alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ATTACK_RESPONSE Lumma Stealer Payload Inbound"; flow:established,to_client; http.response_body; content:"|66 69 6c 65 6e 61 6d 65 3d 22 66 75 63 6b 69 6e 67 64 6c 6c 45 4e 43 52 2e 64 6c 6c 22 3b|"; reference:md5,e627cad277450feb0685a9b2abd981f8; reference:md5,9c44f98f428e7a562553944c3067f73b; classtype:trojan-activity; sid:2064256; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_09_02, deployment Perimeter, malware_family Lumma_Stealer, confidence Medium, signature_severity Major, updated_at 2025_09_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer; target:dest_ip;)