Right now most Russians want to get money out of Russia, not in. Assuming they need it in Russia, the can get paid the ransom to an account in Cyprus, and just swap deposits with a wealthy Russian trying to get rubbles out. Sadly, the obstacles in the financial system only work for law abiding citizens, criminals always find creative ways to circumvent them.
"In 2012, U.S. federal regulators hit HSBC Holdings with a $1.9 billion fine, along with $665 million in civil penalties, for significant lapses in its compliance and anti-money laundering (AML) systems. HSBC laundered over $881 million for Mexico's Sinaloa and Colombia's Norte del Valle drug cartels."
1. It is generally viewed as safer to keep large amounts of money outside of Russia. This is both because the Russian economy is bad, and because organized crime is a huge problem inside of Russia.
2. Russia and Russians have large shortages of things that can easily be bought outside of Russia. Once bought, they are fairly easy to smuggle back into Russia. But first you need to have money outside of Russia.
3. Russians like vacations. Getting yourself out of the country is easier than getting your money out of the country.
"In 2012, U.S. federal regulators hit HSBC Holdings with a $1.9 billion fine, along with $665 million in civil penalties, for significant lapses in its compliance and anti-money laundering (AML) systems. HSBC laundered over $881 million for Mexico's Sinaloa and Colombia's Norte del Valle drug cartels."