alert dns $HOME_NET any -> any any (msg:"ET INFO Free Hosting Domain (codesandbox .io) in DNS Lookup"; dns.query; dotprefix; content:".codesandbox.io"; nocase; endswith; reference:url,codesandbox.io; classtype:misc-activity; sid:2066876; rev:1; metadata:affected_product Any, attack_target Client_and_Server, created_at 2026_01_21, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2026_01_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1102, mitre_technique_name Web_Service;)