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."