alert dns $HOME_NET any -> any any (msg:"ET MALWARE CASHY200 CnC Domain in DNS Lookup"; dns.query; content:".winx64-microsoft.com"; nocase; endswith; reference:url,unit42.paloaltonetworks.com/more-xhunt-new-powershell-backdoor-blocked-through-dns-tunnel-detection/; classtype:domain-c2; sid:2028665; rev:3; metadata:attack_target Client_Endpoint, created_at 2019_10_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_10_13;)