It's even better when you find a box like that installed with no lid on, in a pigeon infested attic. It's truly amazing what the alkaline pigeon cr** does to the copper wires.
I wish I'd taken pictures of the house, it was a rental my friend was thinking of taking and should have been '#1 Violation Alley', there were dozens of boxes like that, some with lids, some without (wirenuts optionally replaced with electrical tape in all cases), the old deadly 3-way systems with switched neutrals, wired in green #14 THWN running bare inside the lath/plaster walls, etc etc.

Getting back to this box, I can't see clearly, but I am imagining the twisted grounds probably aren't connected to the box metalwork either?