alert dns $HOME_NET any -> any any (msg:"ET INFO Free Web Hosting Domain (c1 .biz) in DNS Lookup"; dns.query; dotprefix; content:".c1.biz"; nocase; endswith; classtype:misc-activity; sid:2039046; rev:1; metadata:affected_product Any, attack_target Client_and_Server, created_at 2022_09_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_29;)