This isn’t entirely novel.

I did some grey verging on black hat work a few years back. Target was in a place that putting boots on the ground would have been a challenge, and highly conspicuous.

We targeted the tenant a floor below them. Got in through a networked fax machine. Hijacked an AP, used that to bruteforce our way in upstairs.

I think I might have been working for Russian intelligence, retrospectively. The whole “briefcase full of cash” bit should have been a hint, but it was interesting work, and the dudes we were targeting (a PMC) were no angels.