alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Android Flubot / LIKEACHARM Stealer Exfil (POST)"; flow:established,to_server; http.method; content:"POST"; http.start; content:"/poll.php HTTP/1.1|0d 0a|Content-Length|3a 20|"; fast_pattern; http.user_agent; content:"|28|Linux|3b 20|U|3b 20|Android|20|"; http.host; pcre:"/^[a-z]{15}\.(?:com|ru|cn|su)$/W"; reference:url,twitter.com/bl4ckh0l3z/status/1340960422485213184; reference:md5,43f75535144f3315e402a0aa5f181e7d; classtype:trojan-activity; sid:2031445; rev:2; metadata:attack_target Mobile_Client, created_at 2020_12_21, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_18;)