Possibly a masked hunter nymph (assassin bug)

Usually indoors in dry, dusty places such as attics, wall voids, and storage areas; it camouflages itself with dust and lint.

Predatory; feeds on bed bugs and other small insects by piercing them and sucking out their contents.

Young nymphs coat themselves with dust and debris for camouflage and hunt at night. The image is not clear enough for a definitive identification.

Can bite painfully if handled, but is not a blood-feeder and may help reduce household insect pests.