Rule History

SID: 2044154 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 1 • Feb 9, 2023, 12:00 PM

Message:

ET INFO Observed OneNote Template Domain in TLS SNI (onenotegem .com)

Rule:

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed OneNote Template Domain in TLS SNI (onenotegem .com)"; flow:established,to_server; tls.sni; dotprefix; content:".onenotegem.com"; endswith; fast_pattern; classtype:misc-activity; sid:2044154; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_09, deployment Perimeter, confidence High, signature_severity Informational, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_09;)

Created:

Feb 9, 2023, 12:00 PM

Updated:

Feb 9, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Aug 25, 2025, 9:35 PM

Filename:

rules/emerging-info.rules