ET INFO DNS Over HTTPS Certificate Inbound (dns .codepays .net)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"dns.codepays.net"; fast_pattern;
pcre:"/CN=(?:[^\r\n]+?\.)?dns\.codepays\.net(?!\.)/";
Raw source ET INFO DNS Over HTTPS Certificate Inbound (dns .codepays .net) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET INFO DNS Over HTTPS Certificate Inbound (dns .codepays .net)";
    flow:established,to_client;
    tls.cert_subject;
    content:"dns.codepays.net"; fast_pattern;
    pcre:"/CN=(?:[^\r\n]+?\.)?dns\.codepays\.net(?!\.)/";
    reference:url,github.com/curl/curl/wiki/DNS-over-HTTPS;
    classtype:misc-activity;
    sid:2045829; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_05_23, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_23;
)

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.