If you cannot login, use FTP or the file manager to edit wp-config.php and define WP_HOME and WP_SITEURL,.
define( 'WP_SITEURL', 'http://www.security-shell.com ');
define( 'WP_HOME', 'http://www.security-shell.com ' );
When you moved files to that subfolder, you probably copied and edited the main index.php file. Make sure that that process gets reversed.
That should get things working again.