alert dns $HOME_NET any -> any any (msg:"ET INFO DNS Over HTTPS Domain in DNS Lookup (dns .rjls .me)"; dns.query; dotprefix; content:".dns.rjls.me"; nocase; endswith; reference:url,github.com/curl/curl/wiki/DNS-over-HTTPS; classtype:misc-activity; sid:2053566; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_06_13, deployment Perimeter, confidence High, signature_severity Informational, tag DoH, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_14, reviewed_at 2025_04_21;)