alert udp $EXTERNAL_NET any -> $HOME_NET 137 (msg:"GPL NETBIOS name query overflow attempt UDP"; byte_test:1,&,64,2; content:" "; offset:12; isdataat:56,relative; reference:bugtraq,9624; reference:cve,2003-0825; classtype:attempted-admin; sid:2103196; rev:3; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)