(Reuters) — Russia’s No. 2 bank VTB suffered the biggest cyber attack in its history, it said on Tuesday, warning of temporary difficulties accessing its mobile app and website but assuring customers that their data remained secure.
State-owned VTB said it averted the distributed overload attack, in which hackers try to flood a network with unusually high volumes of data traffic to paralyze it.
“The bank’s technical infrastructure is under an unprecedented cyber attack from abroad,” VTB said in a statement. “The biggest not just this year but in the entire time the bank has been in business.”
Russian state entities and state-owned companies have been affected by events in Ukraine, with websites of the Kremlin, flagship airline Aeroflot and major lender Sberbank among those that have seen outages or temporary access problems.
Hackers also delayed the start of President Vladimir Putin̵7;s speech at Russia’s flagship economic forum earlier this year.
Pro-Russian hackers, meanwhile, have claimed responsibility or been blamed for attacks on websites and infrastructure in Lithuania, Norway and the United States this year.