alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Android Joker CnC Configuration Retrieval"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api/ckwkc2?icc="; startswith; fast_pattern; http.user_agent; content:"(Linux|3b 20|U|3b 20|Android"; http.header_names; content:!"Referer"; reference:url,research.checkpoint.com/2020/android-app-fraud-haken-clicker-and-joker-premium-dialer/; classtype:command-and-control; sid:2030849; rev:2; metadata:attack_target Mobile_Client, created_at 2020_09_08, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_08;)