ET WEB_SERVER PHP Possible ftps Local File Inclusion Attempt

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SERVER PHP Possible ftps Local File Inclusion Attempt";
    flow:established,to_server;
    http.uri;
    content:".php?";
    content:"=ftps|3a|//";
    reference:cve,2002-0953;
    reference:url,diablohorn.wordpress.com/2010/01/16/interesting-local-file-inclusion-method/;
    classtype:web-application-attack;
    sid:2013000; rev:5;
    metadata:affected_product Web_Server_Applications, attack_target Server, created_at 2011_06_10, cve CVE_2002_0953, deployment Perimeter, deployment Internal, deployment Datacenter, confidence High, signature_severity Major, tag Local_File_Inclusion, tag Exploit, tag LFI, tag RFI, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_20, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)