ET EXPLOIT php script double base64 encoded Remote Code Execution 7

Query · suricata

flow:established,to_server;
content:"dktqdy9jR2h3S";
Raw source ET EXPLOIT php script double base64 encoded Remote Code Execution 7 · 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 tcp $EXTERNAL_NET any -> $HTTP_SERVERS any (
    msg:"ET EXPLOIT php script double base64 encoded Remote Code Execution 7";
    flow:established,to_server;
    content:"dktqdy9jR2h3S";
    classtype:attempted-user;
    sid:2025816; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2018_07_09, deployment Datacenter, confidence High, signature_severity Major, updated_at 2019_07_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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