alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Android/Opfake.A GetTask CnC Beacon"; flow:established,to_server; http.uri; content:"/getTask.php?"; fast_pattern; nocase; content:"imei="; content:"balance="; http.header_names; content:!"Referer|0d 0a|"; reference:url,quequero.org/2013/09/android-opfake-malware-analysis/; classtype:command-and-control; sid:2017587; rev:6; 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_09, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)