alert tcp $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (msg:"ET WEB_SPECIFIC_APPS webCalendar Remote File include"; flow:to_server,established; content:"includedir="; http_uri; pcre:"/\/ws\/(login|get_reminders|get_events)\.php/"; reference:url,www.securityfocus.com/archive/1/462957; classtype:web-application-attack; sid:2003520; rev:9; metadata:affected_product Any, attack_target Server, created_at 2010_07_30, deployment Datacenter, signature_severity Major, tag Remote_File_Include, updated_at 2019_08_22, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)