alert udp $HOME_NET any -> $EXTERNAL_NET 21116 (msg:"ET INFO RustDesk Register Public Key"; content:"|7A 53 0A 09|"; startswith; fast_pattern; content:"|2d|"; distance:19; within:1; content:"|2d|"; distance:4; within:1; content:"|2d|"; distance:4; within:1; content:"|2d|"; distance:4; within:1; content:"|1A 20|"; distance:12; within:2; reference:url,github.com/rustdesk/rustdesk/issues/594; classtype:misc-activity; sid:2044073; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_02, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_02;)