alert dns $HOME_NET any -> any any (msg:"ET INFO DYNAMIC_DNS Query to nip .io Domain"; dns.query; dotprefix; content:".nip.io"; nocase; endswith; reference:url,nip.io/; reference:url,sslip.io/; classtype:bad-unknown; sid:2062604; rev:2; metadata:attack_target Client_and_Server, created_at 2025_05_27, deployment Perimeter, deprecation_reason Duplicate, performance_impact Low, confidence High, signature_severity Informational, tag AI_Generated_Description, updated_at 2025_06_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1568, mitre_technique_name Dynamic_Resolution;)