alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET WEB_SPECIFIC_APPS PhpTax Possible Remote Code Exec"; flow:established,to_server; http.uri; content:"/phptax/"; nocase; content:"&pfilez="; nocase; classtype:web-application-attack; sid:2015794; rev:3; metadata:created_at 2012_10_12, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_22, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)