ET HUNTING Go-http-client POSTing IP Address and Username

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/go"; bsize:3;
http.user_agent;
content:"Go-http-client/"; startswith;
http.header_names;
content:!"Referer";
http.request_body;
content:"ip|3d 2b 2b 2b|IPv4|2b|Address"; fast_pattern; startswith;
content:"user="; distance:0;
Raw source ET HUNTING Go-http-client POSTing IP Address and Username · 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 HUNTING Go-http-client POSTing IP Address and Username";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/go"; bsize:3;
    http.user_agent;
    content:"Go-http-client/"; startswith;
    http.header_names;
    content:!"Referer";
    http.request_body;
    content:"ip|3d 2b 2b 2b|IPv4|2b|Address"; fast_pattern; startswith;
    content:"user="; distance:0;
    reference:md5,ccbdd9eec161cd6d1e572561deece14f;
    classtype:misc-activity;
    sid:2038792; rev:1;
    metadata:attack_target Client_and_Server, created_at 2022_09_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_09, reviewed_at 2025_07_14;
)

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