ET POLICY SSL/TLS Certificate Observed (Commercial Proxy Provider geosurf .io)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"C=IL, L=Tel Aviv, O=BI Science (2009) Ltd, OU=WEB, CN=*.geosurf.io"; endswith; fast_pattern;
Raw source ET POLICY SSL/TLS Certificate Observed (Commercial Proxy Provider geosurf .io) · 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 SSL/TLS Certificate Observed (Commercial Proxy Provider geosurf .io)";
    flow:established,to_client;
    tls.cert_subject;
    content:"C=IL, L=Tel Aviv, O=BI Science (2009) Ltd, OU=WEB, CN=*.geosurf.io"; endswith; fast_pattern;
    classtype:policy-violation;
    sid:2027760; rev:3;
    metadata:created_at 2019_07_26, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;
)

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