The NCSC said it was "almost certainly" the GRU behind a "BadRabbit" attack in October 2017 that caused disruption to the Kiev metro, Odessa airport and Russia's central bank, and Britain's cyber security chiefs say they have "high confidence" Russian intelligence was responsible for a strike on WADA in August 2017.
Asked why the GRU team was allowed to go back to Russian Federation, a Whitehall official said: "That was a decision taken by the Dutch authorities and that's a question that needs to be addressed to the Dutch authorities".
Russian hackers' activities were exposed following the seizure of laptops from four suspects briefly detained in the Netherlands, from which investigators discovered their use in four global locations including Malaysia.
Britain and the Netherlands accused Russian Federation of sending agents with computer gear and wifi antennas to the Hague, to try to hack into the Organization for the Prohibition of Chemical Weapons (OPCW). The US then indicted seven Russians for involvement in the hacking and other institutions of public importance. British and Dutch cybersecurity experts were able to fend off the attack.
Russian Federation has declined to comment on the GRU's involvement and denied Hunt's accusations.
The cyber-operation in Malaysia targeted the attorney general's office and Malaysian police as well as the investigation into MH17's shooting down, Ambassador Wilson said.
The men had planned to travel on to a laboratory in Spiez, Switzerland used by the OPCW to analyse samples, Dutch Major-General Onno Eichelsheim said. Britain says the nerve agent was Novichok, produced in the Soviet Union, a finding later confirmed by the chemical weapons watchdog.
The Dutch and British blamed Russia's GRU for "brazen" activities across the globe and for trying to cover up Russia's alleged participation in the nerve agent poisoning in March of ex-spy Sergei Skripal and his daughter, and the downing of MH17 over Ukraine that killing all 298 people on board - including 27 Australians - during a period of intense fighting between Ukrainian government forces and pro-Russia rebels.
Dutch Defence Minister Ank Bijleveld told the news conference that "normally we don't reveal this type of counter-intelligence operation", but they had made an exception because of the seriousness of the incident.
According to Eric Welling, Deputy Assistant Director for the FBI's Cyber Division, these GRU hackers operated under the name "Fancy Bear Hacking Team", the same group of Russian government-backed hackers that was the focus of Special Counsel Robert Muller's indictment of GRU hackers early this summer.More news: Pence to Step Up U.S. Criticism of Beijing
Three of the seven officials that are named in this specific indictment (Yermakov, Malyshev and Badin) were also named by Mueller as interfering in the 2016 U.S. election.
Russia's Deputy Foreign Minister Sergey Ryabkov claimed, that by accusing Moscow of cyber attacks, Washington is trying to "save the myth" of Russia's USA election meddling.
"This is not the actions of a great power".
The EU officials said that they deplored such actions that undermined global law and worldwide institutions.
The United States indicted seven alleged Russian members of the GRU military intelligence agency over attacks on targets including the Hague-based OPCW, the US Democratic party, world sports bodies and US nuclear energy company Westinghouse.
While not directly related to the ongoing investigation into suspected Russian interference in the 2016 USA presidential election, John Demers, Assistant Attorney General for the DOJ's national security division, said during a press conference Thursday that three of the named defendants were previously charged in connection with that probe.
The announcement comes on the same day the National Cyber Security Centre (NCSC) claimed a number of notorious cyber attackers responsible for some of the biggest hacks in recent years are all in fact Russian military intelligence (GRU).
GRU stands for the Main Intelligence Directorate, Russia's military intelligence agency which is one of Moscow's three spy agencies along with the FSB security service and the SVR foreign intelligence agency.
'The International Community, including Russian Federation, has agreed that international law and norms of responsible state behaviour apply in cyberspace.