ET POLICY SSL/TLS Certificate Observed (AnyDesk Remote Desktop Software)

Query · suricata

flow:established,to_client;
threshold:type limit, track by_dst, count 1, seconds 600;
tls.cert_subject;
content:"C=DE, O=philandro Software GmbH, CN=AnyNet Relay"; endswith; fast_pattern;
Raw source ET POLICY SSL/TLS Certificate Observed (AnyDesk Remote Desktop Software) · 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 (AnyDesk Remote Desktop Software)";
    flow:established,to_client;
    threshold:type limit, track by_dst, count 1, seconds 600;
    tls.cert_subject;
    content:"C=DE, O=philandro Software GmbH, CN=AnyNet Relay"; endswith; fast_pattern;
    reference:md5,1501639af59b0ff39d41577af30367cf;
    reference:url,jsac.jpcert.or.jp/archive/2023/pdf/JSAC2023_1_1_yamashige-nakatani-tanaka_en.pdf;
    classtype:misc-activity;
    sid:2027761; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2019_07_26, deployment Perimeter, malware_family AnyDesk, performance_impact Low, confidence High, signature_severity Informational, tag RemoteAccessTool, updated_at 2023_05_17;
)

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