-view-php-3a-2f-2ffilter-2fread-3dconvert.base64 Encode-2fresource-3d-2froot-2f.aws-2fcredentials Direct

// Evil example – do not use
$page = $_GET['page'];
include($page . ".php");

An attacker can supply: ?page=php://filter/convert.base64-encode/resource=/root/.aws/credentials

The .php concatenation might break some wrappers, but advanced payloads or null byte injection (%00) can bypass this. Alternatively, if the application uses functions like file_get_contents() or readfile() without suffix addition, the wrapper works directly. // Evil example – do not use $page

function base64Encode($data) 
    return base64_encode($data);

CloudTrail + GuardDuty can detect suspicious API usage from new IPs. Additionally, monitor web server logs for php://filter or base64-encode in query strings. An attacker can supply:

php://filter/convert.base64-encode/resource=/root/.aws/credentials