Versions (4)
Version DetailsCurrent
Rev: 3 • Apr 19, 2023, 12:00 PMET INFO Observed DNS over HTTPS Domain in TLS SNI (dns .alvosec .com)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed DNS over HTTPS Domain in TLS SNI (dns .alvosec .com)"; flow:established,to_server; tls.sni; content:"dns.alvosec.com"; bsize:15; fast_pattern; classtype:misc-activity; sid:2045059; rev:3; metadata:affected_product Any, created_at 2023_04_19, 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_09_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1572, mitre_technique_name Protocol_Tunneling;)
Apr 19, 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