alert dns $HOME_NET any -> any any (msg:"ET POLICY DNS Query to .onion proxy Domain (tor2web)"; dns.query; content:".tor2web"; nocase; endswith; reference:url,en.wikipedia.org/wiki/Tor_(anonymity_network); classtype:bad-unknown; sid:2015576; rev:11; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2012_08_07, deployment Perimeter, deprecation_reason Age, confidence Medium, signature_severity Informational, tag DNS_Onion_Query, updated_at 2024_04_09, reviewed_at 2024_04_09;)