alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ATTACK_RESPONSE ReverseLoader Base64 Encoded Executable In Image M1"; flow:established,to_client; content:"-BaseEnd"; isdataat:!1,relative; reference:md5,156acbdb4695299da30c44fd22e7f62d; reference:md5,e47853c751b49b792e7d27998eb7e3d6; classtype:trojan-activity; sid:2065091; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_08_12, deployment Perimeter, deployment SSLDecrypt, malware_family ReverseLoader, confidence Medium, signature_severity Major, updated_at 2025_10_08, former_sid 2864235, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer; target:dest_ip;)