ET PHISHING [TW] EvilProxy AiTM Microsoft HTTP HOST Struct M1

Query · suricata

flow:established,to_server;
http.host;
pcre:"/^[a-f0-9]{8}(?:-[a-f0-9]{4}){3}-[a-f0-9]{12}-[a-f0-9]{8}\./i";
http.uri;
content:"/ests/2.1/content/"; startswith; fast_pattern;
threshold:type limit, count 1, seconds 30, track by_src;
Raw source ET PHISHING [TW] EvilProxy AiTM Microsoft HTTP HOST Struct M1 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET PHISHING [TW] EvilProxy AiTM Microsoft HTTP HOST Struct M1";
    flow:established,to_server;
    http.host;
    pcre:"/^[a-f0-9]{8}(?:-[a-f0-9]{4}){3}-[a-f0-9]{12}-[a-f0-9]{8}\./i";
    http.uri;
    content:"/ests/2.1/content/"; startswith; fast_pattern;
    threshold:type limit, count 1, seconds 30, track by_src;
    classtype:social-engineering;
    sid:2038737; rev:1;
    metadata:created_at 2022_09_06, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_06;
)

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