Versions (4)
Version DetailsCurrent
Rev: 2 • Mar 9, 2023, 12:00 PMET INFO Observed DNS over HTTPS Domain in TLS SNI (doh-lb-tr .dnsflex .com)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed DNS over HTTPS Domain in TLS SNI (doh-lb-tr .dnsflex .com)"; flow:established,to_server; tls.sni; content:"doh-lb-tr.dnsflex.com"; bsize:21; fast_pattern; reference:url,github.com/curl/curl/wiki/DNS-over-HTTPS; classtype:misc-activity; sid:2044546; rev:2; metadata:created_at 2023_03_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_12_01, reviewed_at 2024_08_28, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1572, mitre_technique_name Protocol_Tunneling;)
Mar 9, 2023, 12:00 PM
Dec 1, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 25, 2025, 9:35 PM
rules/emerging-info.rules