ET EXPLOIT WS_FTP .NET Deserialization Exploit Attempt (CVE-2023-40044)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/AHT/AhtApiService.asmx/AuthUser"; fast_pattern;
http.content_type;
content:"multipart/form-data|3b|"; startswith;
http.request_body;
content:"Content-Disposition|3a 20|form-data|3b 20|name|3d|";
content:!"|3b 20|filename|3d|"; within:400;
target:dest_ip;
Raw source ET EXPLOIT WS_FTP .NET Deserialization Exploit Attempt (CVE-2023-40044) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT WS_FTP .NET Deserialization Exploit Attempt (CVE-2023-40044)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/AHT/AhtApiService.asmx/AuthUser"; fast_pattern;
    http.content_type;
    content:"multipart/form-data|3b|"; startswith;
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name|3d|";
    content:!"|3b 20|filename|3d|"; within:400;
    reference:cve,2023-40044;
    reference:url,www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules-cve-2023-40044;
    classtype:attempted-admin;
    sid:2048383; rev:1;
    metadata:affected_product WS_FTP, attack_target FTP_Server, created_at 2023_10_03, cve CVE_2023_40044, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag CISA_KEV, updated_at 2023_10_03, reviewed_at 2023_10_03;
    target:dest_ip;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.