Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE DNS Query to Cobalt Strike Domain (dnsspeedtest2022 .com)"; dns.query; dotprefix; content:".dnsspeedtest2022.com"; nocase; endswith; reference:url,news.sophos.com/en-us/2024/06/05/operation-crimson-palace-a-technical-deep-dive/; classtype:trojan-activity; sid:2053343; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_06_07, deployment Perimeter, deprecation_reason Relevance, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_21, reviewed_at 2025_04_21;)