alert dns $HOME_NET any -> any any (msg:"ET INFO Commonly Abused Domain in DNS Lookup (rf .gd)"; dns.query; dotprefix; content:".rf.gd"; nocase; endswith; classtype:bad-unknown; sid:2048582; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_10_17, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_17, reviewed_at 2024_03_18; target:src_ip;)