alert dns $HOME_NET any -> any any (msg:"ET MALWARE XCodeGhost DNS Lookup"; dns.query; content:"init.icloud-diagnostics.com"; depth:27; nocase; endswith; fast_pattern; reference:url,researchcenter.paloaltonetworks.com/2015/09/novel-malware-xcodeghost-modifies-xcode-infects-apple-ios-apps-and-hits-app-store; classtype:trojan-activity; sid:2021807; rev:5; metadata:created_at 2015_09_22, confidence Medium, signature_severity Major, updated_at 2020_09_17;)