2. Go to Appearance > Themes page, update your theme to V1.2.6
3. If you use the Child theme, Go to Appearance > Editor, check the functions.php file, delete the unknown codes except for your own custom codes.
4. Update the plugins to the latest version.
5. Update WordPress to the latest version.
That’s it, the virus files are cleared.
If you have any troubles on these steps please post your WP login details via private reply. I will help you to fix that and make your site 100% secure.