Welcome to the community. 
This is a false positive. Trainers will trigger antiviruses every now and again, no matter where on the internet you get them from. It is triggered purely because of how trainers work (injecting values into your PC’s RAM while a game is running from it). You can find this information by using the search tool in the top-right of the forum.
Add WeMod as an exception and the issue will be resolved.
More information: Windows Defender marked WeMod as a Trojan