alert tcp $EXTERNAL_NET any -> $HOME_NET !3389 (msg:"ET SCAN MS Terminal Server Traffic on Non-standard Port"; flow:to_server,established; content:"|03 00 00|"; depth:3; content:"|e0 00 00 00 00 00|"; offset:5; depth:6; content:"Cookie|3a 20|mstshash="; fast_pattern; classtype:attempted-recon; sid:2023753; rev:3; metadata:affected_product Microsoft_Terminal_Server_RDP, attack_target Server, created_at 2017_01_23, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2022_09_14;)