Follow the following steps to remove malicious code.
- Find the code which is repeating on every file.
- Put that code in box (textarea).
- Hit Submit.
In most of the cases - it is reportetd that files are full of malicous code in WordPress. So its actually desinged for it.
To get more knowldge about power of RMCI, please visit How to use RMCI ? #WP
That's it. Daniyal.