alert dns $HOME_NET any -> any any (msg:"ET INFO URL Shortening Domain in DNS Lookup (da .gd)"; dns.query; content:"da.gd"; nocase; bsize:5; classtype:bad-unknown; sid:2045305; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_05_03, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_03, reviewed_at 2023_12_01;)