alert dns $HOME_NET any -> any any (msg:"ET POLICY DNS Query to .onion proxy Domain (onion. sx)"; dns.query; content:".onion.sx"; nocase; endswith; reference:url,en.wikipedia.org/wiki/Tor_(anonymity_network); classtype:bad-unknown; sid:2025446; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_03_28, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Minor, updated_at 2020_09_16;)