Seems like there's a few options. It could all be a bluff, or Russia might already know, or they know part and some part is fake to cause them to overreact, or

Seems like there's a few options. It could all be a bluff, or Russia might already know, or they know part and some part is fake to cause them to overreact, or some part of it is cover for some other way they're getting info. Or it's a double-bluff and it really is mostly or completely true and the intent is to get Russia to disregard it.