alert dns $HOME_NET any -> any any (msg:"ET INFO Observed DNS Query to xsph .ru Domain"; dns.query; dotprefix; content:".xsph.ru"; nocase; endswith; classtype:misc-activity; sid:2038906; rev:1; metadata:affected_product Any, attack_target Client_and_Server, created_at 2022_09_20, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_20;)