alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Possible FatPipe Unrestricted File Upload"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/fpui/uploadConfigServlet?fileNumber="; nocase; fast_pattern; reference:url,ic3.gov/Media/News/2021/211117-2.pdf; classtype:attempted-admin; sid:2034530; rev:1; metadata:attack_target Server, created_at 2021_11_22, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2021_11_22, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)