Rule History

SID: 2053553 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 1 • Jun 13, 2024, 12:00 PM

Message:

ET INFO DNS Over HTTPS Domain in DNS Lookup (nsec .arnor .org)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET INFO DNS Over HTTPS Domain in DNS Lookup (nsec .arnor .org)"; dns.query; dotprefix; content:".nsec.arnor.org"; nocase; endswith; reference:url,github.com/curl/curl/wiki/DNS-over-HTTPS; classtype:misc-activity; sid:2053553; 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;)

Created:

Jun 13, 2024, 12:00 PM

Updated:

Jun 14, 2024, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Aug 12, 2025, 9:34 PM

Filename:

rules/emerging-info.rules