Magento Website Malware

I have Magento website and it have some kind of the malware that did SQL Injection, and also on each reload of my page it add scripts to my DB under cms_block content of each record, also on website it loads something called jqueri.at and calls getCookie, does anyone have advice how to find it? I already tried grep, cleaned db, checked git status for modified files, deleted vendor and static files, and created new ones. It executes in real-time. How to find it and remove it?