alert dns $HOME_NET any -> any any (msg:"ET MALWARE DNS Query to RokRat Domain (nate-download .com)"; dns.query; content:"nate-download.com"; nocase; bsize:17; reference:url,research.checkpoint.com/2023/chain-reaction-rokrats-missing-link/; classtype:trojan-activity; sid:2045274; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_05_01, deployment Perimeter, malware_family Rokrat, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_23, reviewed_at 2023_08_23;)