alert tcp $EXTERNAL_NET any -> any 3389 (msg:"ET POLICY Inbound RDP Connection with Minimal Security Protocol Requested"; flow:established,to_server; content:"|00 00|"; offset:1; depth:2; content:"|e0|"; distance:2; within:1; content:"|01 00 08 00 00 00 00 00|"; within:15; fast_pattern; endswith; reference:url,medium.com/@bromiley/what-happens-before-hello-ce9f29fa0cef; classtype:bad-unknown; sid:2027413; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2019_05_31, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2020_08_19;)