The arrests of the suspects, including two on Nov. 4 by Romanian authorities, were part of Operation GoldDust that involved Europol, Eurojust and Interpol, it said.
Yaroslav Vasinskyi and another alleged REvil operative, Russian national Yevgeniy Polyanin, were charged by the United States with conspiracy to commit fraud and other crimes.
The hackers announced they had targeted Ehud Leviathan Engineering, David Engineers and H.G.M. Engineering in their latest attack.
An investigation was underway to understand the nature and extent of the attack, which was detected on Saturday, health minister John Haggie told reporters.
Iran has been looking to cyberspace as both a threat and an opportunity in recent years. It has called for the need to establish a single command to counter cyberattacks
Reports say that a notorious gang of Russian hackers leaked confidential documents relating to NRA grants, claiming it hacked the American gun rights advocacy group.
Black Shadow is responsible for previous attacks on Israeli vehicle insurance company Shirbit.
The head of the Supreme National Security Council of Iran, Ali Shamkhani, tweeted in Hebrew on Thursday that Iran had 'foiled the enemy's plans' to wreak havoc during Tuesday's cyberattack.
ADA, an Anti-Jam GPS System, was successfully operated during Operation ‘Guardian of the Walls’ in May.
'We are currently in a new, unfamiliar type of war – a 5G cold war,' Communications Minister Yoaz Hendel said at the Cybertech New York conference.