alert dns $HOME_NET any -> any any (msg:"ET INFO Observed DNS Query to .ryukyu TLD"; dns.query; content:".ryukyu"; nocase; endswith; reference:url,www.spamhaus.org/statistics/tlds/; classtype:bad-unknown; sid:2027869; rev:4; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2019_08_13, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;)