alert tcp $EXTERNAL_NET any -> $HOME_NET 445 (msg:"GPL NETBIOS SMB-DS Trans2 QUERY_FILE_INFO attempt"; flow:established,to_server; content:"|00|"; depth:1; content:"|FF|SMB2"; within:5; distance:3; content:"|07 00|"; within:2; distance:56; flowbits:set,smb.trans2; flowbits:noalert; classtype:protocol-command-decode; sid:2103137; rev:5; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)