alert dns $HOME_NET any -> any any (msg:"ET POLICY ipchicken .com DNS Lookup"; dns.query; content:"ipchicken.com"; nocase; endswith; classtype:policy-violation; sid:2030138; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_05_08, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_17;)