GPL NETBIOS SMB DCERPC invalid bind attempt

Query · suricata

flow:to_server,established;
content:"|FF|SMB%"; depth:5; offset:4; nocase;
content:"&|00|"; within:2; distance:56;
content:"|5C 00|P|00|I|00|P|00|E|00 5C 00|"; within:12; distance:5; nocase;
content:"|05|"; within:1; distance:2;
content:"|0B|"; within:1; distance:1;
byte_test:1,&,1,0,relative;
content:"|00|"; within:1; distance:21;
Raw source GPL NETBIOS SMB 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 445 (
    msg:"GPL NETBIOS SMB DCERPC invalid bind attempt";
    flow:to_server,established;
    content:"|FF|SMB%"; depth:5; offset:4; nocase;
    content:"&|00|"; within:2; distance:56;
    content:"|5C 00|P|00|I|00|P|00|E|00 5C 00|"; within:12; distance:5; nocase;
    content:"|05|"; within:1; distance:2;
    content:"|0B|"; within:1; distance:1;
    byte_test:1,&,1,0,relative;
    content:"|00|"; within:1; distance:21;
    classtype:attempted-dos;
    sid:2102191; rev:4;
    metadata:created_at 2010_09_23, signature_severity Informational, updated_at 2019_07_26;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.