Versions (3)
Version DetailsCurrent
Rev: 3 • Aug 12, 2024, 12:00 PMET INFO Observed DNS Over HTTPS Domain (dns .tsknf .net) in TLS SNI
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed DNS Over HTTPS Domain (dns .tsknf .net) in TLS SNI"; flow:established,to_server; tls.sni; bsize:13; content:"dns.tsknf.net"; fast_pattern; reference:url,github.com/curl/curl/wiki/DNS-over-HTTPS; classtype:misc-activity; sid:2055210; rev:3; metadata:affected_product Any, created_at 2024_08_12, deployment Perimeter, malware_family DoH, malware_family DNS_Over_HTTPS, performance_impact Low, confidence High, signature_severity Informational, tag DNS_over_HTTPS, tag DoH, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_12_01, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1572, mitre_technique_name Protocol_Tunneling;)
Aug 12, 2024, 12:00 PM
Dec 1, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Jul 30, 2025, 9:35 PM
rules/emerging-info.rules