Rule History

alert dns $HOME_NET any -> any any (msg:"ET INFO Observed DNS Query to Online Email Hosting Provider (mail .privateemail .com)"; dns.query; bsize:21; content:"mail.privateemail.com"; nocase; reference:md5,65863868eacac1fe96fcf7f168b4baaa; classtype:misc-activity; sid:2064574; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_09_11, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_11;)