GPL NETBIOS SMB llsrpc create tree attempt

Query · suricata

flow:established,to_server;
flowbits:isset,smb.tree.connect.ipc;
content:"|00|"; depth:1;
content:"|FF|SMB|A2|"; within:5; distance:3;
byte_test:1,!&,128,6,relative;
content:"|5C|llsrpc|00|"; within:8; distance:78; nocase;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source GPL NETBIOS SMB llsrpc create tree 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 139 (
    msg:"GPL NETBIOS SMB llsrpc create tree attempt";
    flow:established,to_server;
    flowbits:isset,smb.tree.connect.ipc;
    content:"|00|"; depth:1;
    content:"|FF|SMB|A2|"; within:5; distance:3;
    byte_test:1,!&,128,6,relative;
    content:"|5C|llsrpc|00|"; within:8; distance:78; nocase;
    classtype:protocol-command-decode;
    sid:2103090; rev:5;
    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.