alert tcp $EXTERNAL_NET any -> $HOME_NET 445 (msg:"GPL NETBIOS SMB-DS llsrpc andx create tree attempt"; flow:established,to_server; flowbits:isset,smb.tree.connect.ipc; content:"|00|"; depth:1; content:"|FF|SMB"; within:4; distance:3; pcre:"/^(\x75|\x2d|\x2f|\x73|\x2e|\x24|\x74)/sR"; byte_test:1,!&,128,6,relative; content:"|A2|"; depth:1; offset:39; byte_jump:2,0,little,relative; content:"|5C|llsrpc|00|"; within:8; distance:51; nocase; classtype:protocol-command-decode; sid:2103096; rev:4; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)