ET HUNTING Terse DoH Style Query (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/resolve?type="; startswith; fast_pattern;
content:"&name="; distance:0;
http.header_names;
content:!"User-Agent|0d 0a|";
content:!"Referer|0d 0a|";
content:!"|0d 0a|Accept";
target:src_ip;
Raw source ET HUNTING Terse DoH Style Query (GET) · 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 Terse DoH Style Query (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/resolve?type="; startswith; fast_pattern;
    content:"&name="; distance:0;
    http.header_names;
    content:!"User-Agent|0d 0a|";
    content:!"Referer|0d 0a|";
    content:!"|0d 0a|Accept";
    reference:md5,dc1852f54d4e5144b3129a2294d3bc39;
    classtype:bad-unknown;
    sid:2044850; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_31, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_31;
    target:src_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.