alert dns $HOME_NET any -> any any (msg:"ET INFO Microsoft Dev Tunnels Domain DNS Lookup (devtunnels .ms)"; dns.query; dotprefix; content:".devtunnels.ms"; nocase; endswith; reference:url,learn.microsoft.com/en-us/azure/developer/dev-tunnels/overview; classtype:bad-unknown; sid:2047820; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_08_30, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_30, reviewed_at 2024_01_29; target:src_ip;)