ET INFO Applied Privacy DNS over HTTPS Certificate Inbound

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"CN=doh.applied-privacy.net"; bsize:26; fast_pattern;
tls.cert_issuer;
content:"C=US, O=Let's Encrypt, CN=R3"; bsize:28;
Raw source ET INFO Applied Privacy DNS over HTTPS Certificate Inbound · 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 Applied Privacy DNS over HTTPS Certificate Inbound";
    flow:established,to_client;
    tls.cert_subject;
    content:"CN=doh.applied-privacy.net"; bsize:26; fast_pattern;
    tls.cert_issuer;
    content:"C=US, O=Let's Encrypt, CN=R3"; bsize:28;
    classtype:misc-activity;
    sid:2035125; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_02_08, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag DoH, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_08;
)

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