alert dns $HOME_NET any -> any any (msg:"ET INFO Ex Libris Library Software DNS Lookup"; dns.query; dotprefix; content:".exlibrisgroup.com"; nocase; endswith; reference:url,exlibrisgroup.com/; classtype:misc-activity; sid:2044132; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_02_06, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_06;)