ET ATTACK_RESPONSE ReverseLoader Base64 Encoded Executable In Image M1

Query · suricata

flow:established,to_client;
content:"-BaseEnd";
isdataat:!1,relative;
target:dest_ip;
Raw source ET ATTACK_RESPONSE ReverseLoader Base64 Encoded Executable In Image M1 · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
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;
)

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