I call parallel construction.
(This is mostly a joke, but...)
The “leaker”‘s real life identity then “goes to jail” for 30 years and they work for the government in clandestine services under a new identity. This tactic confuses the enemy, and has the side benefit of scaring your own into being more careful with real classified docs.
If I was unethical enough to work for the security apparatus, the above is definitely something I would do.
For this one to work, you would have to convince the Russian secret services, a pretty high bar. Usually, leaks just have to pass a sniff test, or not even that, people can just glance over the factual basis for the leak if it's convenient for their world view (e.g. FBI leaking photos from Trump's raid)