alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO DYNAMIC_DNS HTTP Request to a *.myftp .biz Domain"; flow:established,to_server; http.host; content:".myftp.biz"; endswith; reference:url,www.noip.com/support/faq/free-dynamic-dns-domains/; classtype:bad-unknown; sid:2042805; rev:7; metadata:attack_target Client_and_Server, created_at 2022_12_14, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2024_09_18, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1568, mitre_technique_name Dynamic_Resolution;)