Remove trojan from WHM/cPanel server CloudLinux v7.9.0

This is the message I receive. There are several new strange folders in that domain. When I replace them, they come back. I replaced all .js files in that folder, but the odd folders still return.

Type: Trojan
Name: HEUR:Trojan.Script.Generic
Precision: Heuristic Analysis
Threat level: High
Object type: File
Object name: metisMenu.min.js
Object path: https://thresholdtestingsite.com/its/reservations/its_portal/js

Also check for SQL injection.

I will want a report on what files are affected and when if possible.

I want to know