alert dns $HOME_NET any -> any any (msg:"ET POLICY TOR .exit Pseudo TLD DNS Query"; dns.query; content:".exit"; fast_pattern; endswith; reference:url,en.wikipedia.org/wiki/.onion; classtype:policy-violation; sid:2014941; rev:7; metadata:created_at 2012_06_22, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;)