This looks like a crazy hybrid crossed three times, unable to reproduce. The haunches and implied vaulting ability is something we don't have in our known stock.
The key is to isolate the haunch (and hunch) genes. Mini-kangaroo X wolverine?
I base this on my own personal experience with mange in canines. I have to use a lot of hydrocortizone and vitamins to get the animals skin back into decent condition.
As to the haunches....lol...not much of a skeletal expert. raccoons sit up a lot on their haunches. They sit like a baby in a way....this one seemed to do that in the vid I saw. He also knew to grab the cage wires...and the growl was unmistakable..
Whatever it is, do not try to pet or hand feed it.