.htaccess

RewriteEngine On

RewriteBase /

RewriteRule ^files/(.*).exe$ download.php [NC]

download.php

<?php

if( ! empty($_SERVER['HTTP_REFERER'])) {
    $referringUrl = $_SERVER['HTTP_REFERER'];
    $referrer = parse_url($referringUrl);
    setcookie('referrer', $referrer['host']);
}

$pathinfo= pathinfo($_SERVER['REQUEST_URI']);

$downloadedFile = ('file.exe');

header ('Content-Type: application/octet-stream');
header ('Accept-Ranges: bytes');
header ('Content-Length: ' . filesize($downloadedFile));
header ('Content-Disposition: attachment; filename=' . $pathinfo['filename'] . '.exe');

readfile($downloadedFile);