GPL NETBIOS SMB-DS repeated logon failure

Query · suricata

flow:from_server,established;
content:"|FF|SMB"; depth:4; offset:4;
content:"s"; within:1;
content:"m|00 00 C0|"; within:4;
threshold:type threshold,track by_dst,count 10,seconds 60;
Raw source GPL NETBIOS SMB-DS repeated logon failure · 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 $HOME_NET 445 -> $EXTERNAL_NET any (
    msg:"GPL NETBIOS SMB-DS repeated logon failure";
    flow:from_server,established;
    content:"|FF|SMB"; depth:4; offset:4;
    content:"s"; within:1;
    content:"m|00 00 C0|"; within:4;
    threshold:type threshold,track by_dst,count 10,seconds 60;
    classtype:unsuccessful-user;
    sid:2102924; rev:4;
    metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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