alert dns $HOME_NET any -> any any (msg:"ET MALWARE TA444 Domain in DNS Lookup (docsend .linkpc .net)"; dns.query; dotprefix; content:".docsend.linkpc.net"; nocase; endswith; reference:url,www.elastic.co/security-labs/DPRK-strikes-using-a-new-variant-of-rustbucket; classtype:trojan-activity; sid:2046705; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_06_27, deployment Perimeter, confidence High, signature_severity Major, tag TA444, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_30, former_sid 2854680; target:src_ip;)