Rule History

alert udp $HOME_NET 137 -> $EXTERNAL_NET 137 (msg:"ET POLICY NetBIOS nbtstat Type Query Outbound"; content:"|20 43 4b 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 00 01|"; threshold:type limit, track by_src, count 1, seconds 10; classtype:unknown; sid:2013490; rev:4; metadata:created_at 2011_08_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)