ET SCAN Behavioral Unusually fast Terminal Server Traffic Potential Scan or Infection (Inbound)

Query · suricata

flow:not_established,to_server;
flags:S,12;
threshold:type both, track by_src, count 20, seconds 360;
Raw source ET SCAN Behavioral Unusually fast Terminal Server Traffic Potential Scan or Infection (Inbound) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET 3389 (
    msg:"ET SCAN Behavioral Unusually fast Terminal Server Traffic Potential Scan or Infection (Inbound)";
    flow:not_established,to_server;
    flags:S,12;
    threshold:type both, track by_src, count 20, seconds 360;
    classtype:network-scan;
    sid:2001972; rev:21;
    metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2023_11_14;
)

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