ET HUNTING Suspicious PHP Code in HTTP POST (Inbound)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"<?php";
content:"/bin/bash"; fast_pattern; within:500;
Raw source ET HUNTING Suspicious PHP Code in HTTP POST (Inbound) · Suricata
Esc
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 -> $HTTP_SERVERS any (
    msg:"ET HUNTING Suspicious PHP Code in HTTP POST (Inbound)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"<?php";
    content:"/bin/bash"; fast_pattern; within:500;
    classtype:attempted-admin;
    sid:2031126; rev:2;
    metadata:attack_target Web_Server, created_at 2020_10_27, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_27;
)

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