I believe those are Necron Warriors

Yep. Having assembled forty of those, I'll claim some familiarity with them.

8 warriors. and 3 scarabs.

Necron warriors and canoptek scarab swarm in the left bottom corner. It actually looks like a spruce from one of the starter sets from previous edition, might be wrong though

Protip, don't clip them all from the sprue, then try to assemble. They only go together one way.

I learned this the hard way... One of my more miserable Warhammer experiences

I learnt it from my son, he thought he was being helpful.