GPL NETBIOS DCERPC invalid bind attempt

Query · suricata

flow:to_server,established;
content:"|05|"; depth:1;
content:"|0B|"; within:1; distance:1;
byte_test:1,&,1,0,relative;
content:"|00|"; within:1; distance:21;
Raw source GPL NETBIOS DCERPC invalid bind attempt · 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 135 (
    msg:"GPL NETBIOS DCERPC invalid bind attempt";
    flow:to_server,established;
    content:"|05|"; depth:1;
    content:"|0B|"; within:1; distance:1;
    byte_test:1,&,1,0,relative;
    content:"|00|"; within:1; distance:21;
    classtype:attempted-dos;
    sid:2102190; rev:5;
    metadata:created_at 2010_09_23, signature_severity Informational, updated_at 2019_07_26;
)

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