alert dns $HOME_NET any -> any any (msg:"ET MALWARE DNS Query to Raspberry Robin Domain (u0 .nz)"; dns.query; content:"u0.nz"; nocase; bsize:5; reference:url,twitter.com/BushidoToken/status/1653848522087596034; reference:url,blog.bushidotoken.net/2023/05/raspberry-robin-global-usb-malware.html; classtype:trojan-activity; sid:2045415; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_05_04, deployment Perimeter, malware_family RaspberryRobin, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_04, reviewed_at 2023_08_22;)