Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed DNS Related Tools Domain (viewdns .net in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".viewdns.net"; endswith; fast_pattern; reference:url,viewdns.info/api/docs/; classtype:misc-activity; sid:2051518; rev:1; metadata:attack_target Client_and_Server, created_at 2024_03_07, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_07;)