ET SCAN Potential SSH Scan

Query · suricata

flow:to_server;
flags:S,12;
threshold:type both, track by_src, count 5, seconds 120;
Raw source ET SCAN Potential SSH Scan · Suricata
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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 22 (
    msg:"ET SCAN Potential SSH Scan";
    flow:to_server;
    flags:S,12;
    threshold:type both, track by_src, count 5, seconds 120;
    reference:url,en.wikipedia.org/wiki/Brute_force_attack;
    classtype:attempted-recon;
    sid:2001219; rev:20;
    metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2019_07_26;
)

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