alert tcp $EXTERNAL_NET any -> $HOME_NET 139 (msg:"GPL NETBIOS DOS RFPoison"; flow:to_server,established; content:"|5C 00 5C 00|*|00|S|00|M|00|B|00|S|00|E|00|R|00|V|00|E|00|R|00 00 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 FF FF FF FF 00 00 00 00|"; reference:arachnids,454; classtype:attempted-dos; sid:2100529; rev:8; metadata:created_at 2010_09_23, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)