alert tcp $EXTERNAL_NET any -> $HOME_NET 139 (msg:"GPL NETBIOS SMB ADMIN$ unicode share access"; flow:established,to_server; content:"|00|"; depth:1; content:"|FF|SMBu"; within:5; distance:3; byte_test:1,&,128,6,relative; byte_jump:2,34,little,relative; content:"A|00|D|00|M|00|I|00|N|00 24 00 00 00|"; distance:2; nocase; classtype:protocol-command-decode; sid:2102473; rev:9; metadata:created_at 2010_09_23, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)