alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Android/Opfake.A Country CnC Beacon"; flow:established,to_server; http.uri; content:".php?"; content:"co"; content:"untry="; content:"phone="; content:"&op="; content:"imei="; fast_pattern; http.user_agent; content:"Apache-HttpClient/"; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,quequero.org/2013/09/android-opfake-malware-analysis/; classtype:command-and-control; sid:2017588; rev:10; metadata:affected_product Android, attack_target Client_Endpoint, created_at 2013_10_14, deployment Perimeter, signature_severity Major, tag Android, tag c2, updated_at 2024_05_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)