The domain is hosted by https://tucowsdomains.com/ which appears to be Canadian so you stand a good chance of getting the domain taken down, the owner appear to live in Latvia so not much you can do there.
The server 163.172.33.204 is located in France and is run by https://www.scaleway.com/en/dedibox/ so it should not be to difficult to get them shut down.
They appear to be stealing mods for a lot of other games as well, such as euro truck simulator 2, american truck simulator, dying light, farming simulator, fallout 4, mud runner and a whole bunch more.
Try a DMCA request, if that fails to get any response then try get the domain and server taken down, preferably you want to get as many people as possible complaining.
For reference here is a list of domains running on the server:
allflightmods.com
bestatsmods.com
booztgames.com
dyinglight2mods.com
ets2france.com
farming17mods.com
farming2017mod.com
farmingsim2017.com
l2kill.com
modsats.com
modsfallout4.com
modswows.com
mudrunner2mods.com
mudrunnermods.com
pf2018mods.com
rfsmods.com
scrapmechanicmod.com
sims4modding.com
sims5mods.com
snowrunnermods.com
stardewvalleymod.com
trainsimmods.com
trovemods.com
zaidimupasaulis.com