alert tcp $EXTERNAL_NET any -> $HOME_NET 135 (msg:"GPL NETBIOS DCERPC irot bind attempt"; flow:established,to_server; content:"|05|"; depth:1; byte_test:1,&,16,3,relative; content:"|0B|"; within:1; distance:1; content:"`|9E E7 B9|R=|CE 11 AA A1 00 00|i|01 29|?"; within:16; distance:29; flowbits:set,smb.tree.bind.irot; flowbits:noalert; classtype:protocol-command-decode; sid:2103236; rev:3; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)