alert dns $HOME_NET any -> any any (msg:"ET MALWARE APT28 Komplex DNS Lookup (itunes-helper .net)"; dns.query; content:"itunes-helper.net"; depth:17; nocase; endswith; fast_pattern; reference:url,researchcenter.paloaltonetworks.com/2016/09/unit42-sofacys-komplex-os-x-trojan/; classtype:targeted-activity; sid:2023301; rev:5; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2016_09_26, deployment Perimeter, malware_family APT28, malware_family OSX_Komplex, confidence Medium, signature_severity Major, updated_at 2020_09_17;)