Rule History

alert dns $HOME_NET any -> any any (msg:"ET PHISHING Observed DNS Query to DeviceCode Phishing Domain (microsoft .customers-365 .com)"; dns.query; dotprefix; content:".microsoft.customers-365.com"; nocase; endswith; classtype:social-engineering; sid:2069118; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_05_04, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_05_04;)