alert dns $HOME_NET any -> any any (msg:"ET INFO Anonymous File Sharing Domain in DNS Lookup (qu .ax)"; dns.query; bsize:5; content:"qu.ax"; nocase; reference:url,qu.ax; classtype:misc-activity; sid:2048381; rev:1; metadata:affected_product Any, attack_target Client_and_Server, created_at 2023_10_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_10_02, reviewed_at 2024_10_02;)