alert dns $HOME_NET any -> any any (msg:"ET INFO URI Shortening Domain in DNS Lookup (alturl .com)"; dns.query; bsize:10; content:"alturl.com"; nocase; classtype:misc-activity; sid:2047712; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_08_23, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag URL_Shortener_Service, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_23, reviewed_at 2023_08_23; target:src_ip;)