I having headache with website malware or spyware detected by google, and also affect some of my website.
Malwarebytes is an anti-malware that detection and removal of malware. This software is recommanded by my web hosting technical support, they find that this software was reported good result by some ppl. Of course, there are others anti-malware out there. Not all the anti-malware can detect, you still need different software to scan it.
Hope this help.