ET EXPLOIT Possible EyesOfNetwork Remote File Upload with PHP WebShell Inbound (CVE-2021-27513)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/module/admin_itsm/ajax.php";
http.request_body;
content:"|0d 0a 0d 0a|<?php"; fast_pattern;
content:"name=|22|itsm_type_request|22|"; distance:0;
Raw source ET EXPLOIT Possible EyesOfNetwork Remote File Upload with PHP WebShell Inbound (CVE-2021-27513) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Possible EyesOfNetwork Remote File Upload with PHP WebShell Inbound (CVE-2021-27513)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/module/admin_itsm/ajax.php";
    http.request_body;
    content:"|0d 0a 0d 0a|<?php"; fast_pattern;
    content:"name=|22|itsm_type_request|22|"; distance:0;
    reference:cve,2021-27513;
    classtype:attempted-admin;
    sid:2034160; rev:1;
    metadata:attack_target Server, created_at 2021_10_09, cve CVE_2021_27513, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2021_10_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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