alert dns $HOME_NET any -> any any (msg:"ET INFO DYNAMIC_DNS Query to a *.fluxus .org Domain"; dns.query; content:".fluxus.org"; fast_pattern; nocase; endswith; reference:url,freedns.afraid.org/domain/registry/page-2.html; classtype:bad-unknown; sid:2050139; rev:2; metadata:attack_target Client_and_Server, created_at 2024_01_18, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2024_06_11, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1568, mitre_technique_name Dynamic_Resolution;)