alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Android.Dropper.Abd Checkin"; flow:to_server,established; http.method; content:"POST"; nocase; http.uri; content:"/ad-"; pcre:"/\/ad-(?:strat|devi)\/$/"; http.user_agent; content:"|3b 20|Android|20|"; http.request_body; content:"RgQ7"; depth:4; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:md5,66a1dda748d073f5e659b700339c3343; reference:url,www.zscaler.com/blogs/research/malicious-android-ads-leading-drive-downloads; classtype:trojan-activity; sid:2024411; rev:3; metadata:affected_product Android, attack_target Mobile_Client, created_at 2017_06_19, deployment Perimeter, confidence High, signature_severity Major, tag Android_07012016, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_06, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)