alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO DYNAMIC_DNS HTTP Request to a * .float-zone .com Domain"; flow:established,to_server; http.host; content:".float-zone.com"; endswith; reference:url,docs.fortinet.com/document/fortigate/6.4.5/administration-guide/685361/ddns; classtype:bad-unknown; sid:2059460; rev:1; metadata:attack_target Client_and_Server, created_at 2025_01_22, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2025_01_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1568, mitre_technique_name Dynamic_Resolution;)