Two analytics firms say they have robust intelligence pointing to a North Korean state-backed group as the likely culprit.
Most Recent Articles
Emotional reunions with loved ones for Oleshky evacuees
The BBC's Dan Johnson travelled to the northern Ukrainian border with Belarus after evacuated Oleshky residents arrived in buses and ambulances following a temporary ceasefire.
'It's been killing me!' Celebrity Traitors winners relieved the secret is out
The second series of the hit show reached its finale on Friday, attracting a whopping 11.2 million live viewers.
Martinez's 'inexplicable' 83 seconds cost Man Utd and Carrick
Manchester United defender Lisandro Martinez condemned for costly red card in 2-0 defeat to Chelsea at Stamford Bridge.
Returning Estevao brings X-factor to strikerless Chelsea
Morgan Rogers swings the match in Chelsea's favour as Estevao Willian dazzles, making a mystery of his limited action under Xabi Alonso this season.
Ukrainian evacuees reunite with family after years trapped in Russia-occupied city
Oleshky residents had been without food, water and electricity, with many resorting to cooking garden weeds to survive.
More than 5,000 die from Ebola in DR Congo's deadliest outbreak
Government data shows that more than 10,000 people have contracted the rare virus.
A 3/10 that might be generous - player ratings for Chelsea v Man Utd
Player ratings as Morgan Rogers and Cole Palmer score second-half goals in Chelsea's home win over Manchester United, who have Lisandro Martinez sent off.
Carragher apologises to Villa for 'wrong' language
Jamie Carragher apologises for "clumsy and wrong" language when linking manager Unai Emery with becoming Manchester United head coach, after Aston Villa threatened to sue him.
Burnham 'open' to calls for slavery apology but not reparations
The British government has never formally apologised for slavery despite repeated calls from a number of Commonwealth leaders.
'Un-Australian' - Warner tears into former side after SA charge to win
Australia crumble under the pressure of a final-day chase as South Africa charge to a famous Test and series victory.
Europe can no longer rely on US to 'bankroll' its defence, Starmer says
Sir Keir warns that "things will not go back to the way they were" as he says the US makes it clear it will no longer "bankroll" its allies.
Europe can no longer rely on US to 'bankroll' its defence, Starmer says
Sir Keir warns that "things will not go back to the way they were" as he says the US makes it clear it will no longer "bankroll" its allies.
US approves sale of 500 Patriot missiles to Ukraine
The American-made interceptors are the only effective weapon for downing Russia's ballistic missiles.
Celebrity Traitors comes to a climax in nail-biting final
The second series of the hit show reached its climax on Friday after attracting 15 million viewers.
UK police cannot 'intervene' over woman killed by father in US, despite 'unlawful' ruling
Jane Coates wrote to Cheshire police urging them to gather evidence into Lucy Harrison's killing.
AC Milan v Inter and the tale of an iconic image
AC Milan versus Inter will be shown live on the BBC on Saturday - this is the story of the fixture's most iconic image.
Shearer discusses scoring record, MOTD & a brush with Cardiff
Alan Shearer discusses his love of Newcastle, almost continuing his managerial career and swapping the pitch for the commentary box in The Football Interview.
Shearer on trials of MOTD & the manager's job that never was
Alan Shearer discusses his love of Newcastle, almost continuing his managerial career and swapping the pitch for the commentary box in The Football Interview.
Spain train disaster clouds Sánchez chances of re-election
The Spanish PM is hit by a succession of crises just weeks before a snap general election.
Spain train disaster clouds Sánchez chances of re-election
The Spanish PM is hit by a succession of crises just weeks before a snap general election.