Thimbleberry, Rubus parviflorus. A native plant so not invasive but can spread easily via underground rhizomes.

Hmm could it be something else? I've seen thimble berry before and recall the foliage being rather distinct.

Check out Rubus phoenicolasius, Japanese Wineberry.

sure looks like wineberry to me, an introduced weed with spiny stems covered with red glandular, sticky hairs. Leaf underside distinctly white. Fruiting now and very abundant. I remove them when I see them, they can grow and fruit in either sun or shade. Worth noting OP is posting from eastern US.

Thank you. I think that's it.

-Chris

Thimbleberry has grape-like leaves, unlike the plant pictured. Thimbleberry druplets are not reflective.

Thimbleberry has grape-like leaves, unlike the plant pictured. Thimbleberry druplets are not reflective.