Duplicating drupal site without login info
One way of solving your issue would be to update super admin (first user) password pragmatically, by creating a temporary php file under Drupal root folder and add the following code to it then access it from a browser.

&lt;?php 

define('DRUPAL_ROOT', getcwd());
require_once DRUPAL_ROOT . '/includes/bootstrap.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);


// load super admin user
$account = user_load(1);

// save user password
user_save($account, array('pass' =&gt; 'admin'));

echo "Super admin password has been changed";


Make sure to replace admin with desired password