Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to DefendNot Domain (dnot .sh)"; dns.query; dotprefix; content:".dnot.sh"; nocase; endswith; reference:url,github.com/es3n1n/defendnot; classtype:trojan-activity; sid:2068055; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_03_06, deployment Perimeter, malware_family DefendNot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_06;)