alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE IOS_XAGENT UA"; flow:to_server,established; http.user_agent; content:"XAgent/1."; depth:9; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/pawn-storm-update-ios-espionage-app-found/; classtype:trojan-activity; sid:2020364; rev:4; metadata:created_at 2015_02_05, signature_severity Major, updated_at 2020_05_15;)