alert udp $HOME_NET any -> $EXTERNAL_NET 21116 (msg:"ET INFO RustDesk Get Software Update URL"; dsize:10; content:"|8a 01 07 0a 05|"; startswith; fast_pattern; reference:url,github.com/rustdesk/rustdesk/issues/594; classtype:misc-activity; sid:2044072; 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;)