alert dns $HOME_NET any -> any any (msg:"ET MALWARE GuLoader Domain in DNS Lookup (zoneofzenith .com)"; dns.query; dotprefix; content:".zoneofzenith.com"; nocase; endswith; reference:url,www.fortinet.com/blog/threat-research/spoofed-saudi-purchase-order-drops-guloader; classtype:trojan-activity; sid:2036674; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_05_24, deployment Perimeter, malware_family GuLoader, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_24;)