Rule History

SID: 2069007 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Apr 27, 2026, 12:00 PM

Message:

ET PHISHING Observed DNS Query to DeviceCode Phishing Domain (support-ms365 .com)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET PHISHING Observed DNS Query to DeviceCode Phishing Domain (support-ms365 .com)"; dns.query; dotprefix; content:".support-ms365.com"; nocase; endswith; classtype:social-engineering; sid:2069007; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_04_27, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_04_27;)

Created:

Apr 27, 2026, 12:00 PM

Updated:

Apr 27, 2026, 12:00 PM

DB Created:

Apr 27, 2026, 10:34 PM

DB Updated:

May 18, 2026, 9:34 PM

Filename:

rules/emerging-phishing.rules