virus in my amember php files

I have detected a 61.4.82.212 virus or trojan in files admin/index.php, amember/login.php and possibly in all my amember php files.
Every time I want to login in my site/amember/login.php to the protected area, a warning appears:
Warning: Visiting this site may harm your computer.
The website contains mecanicaplus.com 61.4.82.212 site, which appears to host malware, ie software that can harm your computer or can operate without your consent. Your computer can be infected just by visiting a site that hosts malware.
If you want more information on problems related to these items, visit the diagnostic page of Google Safe Browsing for 61.4.82.212.
Find out more about how to protect against malicious software online.
I understand that visiting this site may harm my computer.
My costumers will experience the same problem trying login to the protected zone, If you have any advice, or/and any removal procedure, I would appreciate it. PLEASE HELP!!!!
thank you in advance

aMember version?

Your host is infected somehow... and it ends up adding that code to your uploaded files.

I'd move to another safer host (less prone to that issue) and upgrade your amember version.

Yep seems like they hacked into your account.

thanks for your comments, I will change my host provider.