[crowbahr]

"Not on the internet"

I doubt multinational corporations are hiring assassins from the dark web.

I suspect if they are using assassins for hire it's most likely a person to person networking effort: They have a rich friend who has ties to shady ex-army guys etc.

No paper trail. No electronic receipts. Nearly no chance of anything legally provable. A minimum of 2+ degrees of separation etc.

I doubt it's Assassins As A Service: it's just knowing how to find a guy who for 100k doesn't ask questions and can't answer any if he's caught.