Edit: I meant "yes, someone with more knowledge please answer this question". Not "yes, it could be dark matter"
https://en.wikipedia.org/wiki/Massive_compact_halo_object
(that doesn't mean it's categorically wrong, just decided to be so unlikely to be correct that it's not worth our time)
https://en.wikipedia.org/wiki/Massive_compact_halo_object
(that doesn't mean it's categorically wrong, just decided to be so unlikely to be correct that it's not worth our time)