I'm really curious who is leaking/informing Avenatti about all this? And why Avenatti lol. Not the Times or something. Maybe the legality aspect?
Since in addition to the bank records, he seems to continually hint at knowing things in SAR's, for instance, that haven't been released publicly. That he wouldn't really have direct access to in discovery from what I have read, like the three SAR's he accosted the media for not pushing harder to have made public.
I've heard the Treasury but that seems unlikely, it certainly isn't the Mueller team or the SDNY, they have nothing to gain from this. One theory I heard is that this has happened occasionally in the past by some people in the New York FBI office. Which has a bit of a renegade reputation amongst the branches.