alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Trojan-Spy.AndroidOS.Joker Checkin"; flow:established,to_server; http.method; content:"POST"; nocase; http.uri; content:"/api/report"; fast_pattern; http.user_agent; content:"|3b 20|Android|20|"; http.request_body; content:"eyJ"; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,058865332bfae541e82b55e4a7e63aaf; reference:url,medium.com/csis-techblog/analysis-of-joker-a-spy-premium-subscription-bot-on-googleplay-9ad24f044451; classtype:trojan-activity; sid:2027965; rev:6; metadata:affected_product Android, attack_target Mobile_Client, created_at 2019_09_09, deployment Perimeter, malware_family Android_Joker, confidence High, signature_severity Major, tag Android, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_02, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)