Russia's security service had uncovered plans and blocked a series of cyber attacks by foreign intelligence services on the country's leading banks on Friday.
Russia's telecom operator, Rostelecom released a statement and mentioned that they "successfully thwarted DDoS [distributed denial of service] on the five biggest banks and financial organizations in Russia."
"The most sustained attack lasted more than two hours," it said.
Last week, Russia's FSB security service had uncovered plans of various foreign intelligence services to carry out massive cyberattacks on the country's financial system.
The FSB did not release the name of the countries' which were involved in the latest plot against Russian banks. However, they alleged that the attackers would use servers and "command centers" located in the Netherlands belonging to Ukrainian hosting company, BlazingFast.
Russia himself has been accussed by many countries of hacking their security system and halting the security systems. Recently US has accussed Moscow of leaking of private documents online during the run-up to the US presidential election aimed at influencing the outcome.
Vice President Joe Biden had warned that the US will take revenge of this, "at the time of our choosing, and under the circumstances that have the greatest impact".
Moscow-based security giant Kaspersky had said in November that a massive DDoS cyber-attack had hit at least five of Russia's largest banks.
Kaspersky said those attacks used devices located in 30 countries, including the US.