alert dns $HOME_NET any -> any any (msg:"ET INFO DYNAMIC_DNS Query to a *.faqserv .com Domain"; dns.query; content:".faqserv.com"; fast_pattern; nocase; endswith; reference:url,changeip.com; classtype:bad-unknown; sid:2036006; rev:1; metadata:attack_target Client_and_Server, created_at 2022_04_14, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2022_04_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1568, mitre_technique_name Dynamic_Resolution;)