Most of the Wordpress websites are hacked through PHP files placed in various directories of Wordpress. Wordpress is hacked as its structure is well known to the hackers and there are multiple opportunities of breach.
To resolve the hack and fix security issues, we need to make sure the Read/Write/Execute permissions are set properly.
Secondly, the combination of Wordpress plugins that can resolve the issue in real-time would help fix the issue permanently.
I would fix the issues and secure it for future as well. Although, all I need is back-end access and I would finish in 3 hours. But for some files to be modified/deleted/fixed, I would need FTP access and that I can do with Team Viewer.
Best Regards,
Chandresh Tailor