and there is more
http://panamapapers.sueddeutsche.de/articles/57161f07a1bb8d3c3495bc36/
Do not be surprised if the Russian GDP is understated to disguise the rake-off. I.E, what is being stolen does not go through the books. As it is GDP is a lot more than US$ 250 billion but was averaging US$ 877.38 Billion from 1989 until 2015 (with a high of US$ 2231.80 Billion in 2013) and in 2016 is US$1,178 Billion (or so) that is to say close to or at the levels needed to permit such a level of theft.
On hacking, long before this all came topic here, I was talking to an IT guy who was offering services to financial institutions: he was employing lots of Russians who had left Russia following the collapse of the USSR.
He offered his services to one company, who boasted they were unhackable as they has 128 bit encryption: according to him, within a relatively short period of time he was able to present that company with a whole lot of supposedly secured data. Now if people now how to get in, they probably know how to stop others doing the same to them, but as the article says, the chances are it his held in surrogate names.