alert http $HOME_NET any -> $EXTERNAL_NET 9999 (msg:"ET MOBILE_MALWARE Android Spyware Dowgin Checkin"; flow:established,to_server; urilen:13; http.method; content:"POST"; http.uri; content:"/webviewAdReq"; nocase; depth:13; reference:md5,45bf9f6e19649d3e1642854ecd82623c; classtype:trojan-activity; sid:2018663; rev:3; metadata:affected_product Android, attack_target Mobile_Client, created_at 2014_07_11, deployment Perimeter, signature_severity Major, tag Android, updated_at 2020_04_30, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)