ATMs and Banks
There are a lot of banks in Russia, But exchanging currency it's better to use Sberbank, Gazprombank, Alfa-Bank, Moscow Credit Bank, VTB. Most of them are controlled by the state. There are no risks but they may take the different commissions.
Think in advance about the sum. Sometimes it's better to withdraw or exchange $100-$200 once than going 5 times and paying for commission 5 times.
Also, there are a lot of ATMs in Russia where you can withdraw the cash from your card without any problems. Most of the ATMs work only with Russian Rubles, but some of them can give you US Dollars and Euro.
You can find the ATMs in supermarkets, in the bank's branches, the metro or at the stations. But we recommend using ATM in the banks because of card fraud devices. They can be installed on the outside ATMs.
Before going abroad you should call your bank and say about foreign transactions and get the information about the commissions from your bank.