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/"; depth:18;
http.header_names;
content:!"Referer|0d 0a|";
reference:url,quequero.org/2013/09/android-opfake-malware-analysis/;
classtype:command-and-control;
sid:2017588; rev:8;
metadata:affected_product Android, attack_target Client_Endpoint, created_at 2013_10_14, deployment Perimeter, signature_severity Major, tag Android, tag c2, updated_at 2020_10_06, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)