Rule History

SID: 2065867 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Nov 20, 2025, 12:00 PM

Message:

ET INFO Observed DNS Query to .cfd TLD

Rule:

alert dns $HOME_NET any -> any any (msg:"ET INFO Observed DNS Query to .cfd TLD"; dns.query; dotprefix; content:".cfd"; nocase; endswith; fast_pattern; classtype:misc-activity; sid:2065867; rev:1; metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2025_11_20, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_20; target:src_ip;)

Created:

Nov 20, 2025, 12:00 PM

Updated:

Nov 20, 2025, 12:00 PM

DB Created:

Nov 20, 2025, 10:34 PM

DB Updated:

Nov 21, 2025, 9:34 PM

Filename:

rules/emerging-info.rules