When it comes to malware scanning and dealing with hacked websites, we have trusted Sucuri for a number of years. We continue recommend their services to our clients regularly.
If your WordPress site has been recently hacked and you are trying to clean it up yourself, we recommend that you use SiteCheck Malware Scanner, a Free WordPress plugin from Sucuri, to help you during that task.
The free malware scanner plugin has a collection of useful tools that can guide you through this potentially difficult and complicated process.
From the Sucuri blog:
The plugin has a collection of useful tools that can guide you along the way. The steps provided here are not final, and there are some variations that require more work, but by just following these steps, you will get very far. We will also not rely on any specific signature or malware strings, since those can easily be evaded by the clever bad guys.
You can find more information and a step by step process at the Sucuri blog.
We highly recommend you check out this plugin for the recovery and safe renewal of your hacked WordPress site.