ET EXPLOIT WP Download From Files Plugin <= 1.48 Arbitrary File Upload Attempt

Query · suricata

flow:established,to_server;
http.method;
content:"POST"; nocase; bsize:4;
http.uri;
content:"/wp-admin/admin-ajax.php";
http.request_body;
content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|files[]|22 3b 20|filename=|22|";
content:"<?";
content:"download_from_files_617_fileupload"; fast_pattern;
Raw source ET EXPLOIT WP Download From Files Plugin <= 1.48 Arbitrary File Upload Attempt · 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 any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT WP Download From Files Plugin <= 1.48 Arbitrary File Upload Attempt";
    flow:established,to_server;
    http.method;
    content:"POST"; nocase; bsize:4;
    http.uri;
    content:"/wp-admin/admin-ajax.php";
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|files[]|22 3b 20|filename=|22|";
    content:"<?";
    content:"download_from_files_617_fileupload"; fast_pattern;
    reference:url,cxsecurity.com/issue/WLB-2021090097;
    classtype:attempted-admin;
    sid:2033989; rev:1;
    metadata:created_at 2021_09_20, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_06, reviewed_at 2023_12_11;
)

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