ET POLICY Owncloud Observed Self Signed TLS Certificate

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"CN=owncloud"; nocase;
tls.cert_issuer;
content:"CN=owncloud";
Raw source ET POLICY Owncloud Observed Self Signed TLS Certificate · 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 POLICY Owncloud Observed Self Signed TLS Certificate";
    flow:established,to_client;
    tls.cert_subject;
    content:"CN=owncloud"; nocase;
    tls.cert_issuer;
    content:"CN=owncloud";
    classtype:policy-violation;
    sid:2034550; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_11_29, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_29;
)

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