China has denied allegations that it carried out a major cyber-attack against tech giant Microsoft.
The US and other Western countries on Monday accused China of hacking Microsoft Exchange â a popular email platform used by companies worldwide.
They said it was part of a broader pattern of ârecklessâ behaviour that threatened global security, the BBC reports.
China says it opposes all forms of cyber-crime, and has called the claims âfabricatedâ.
Chinaâs foreign ministry spokesman said the US had got its allies to make âunreasonable criticismsâ against China.
The UK, EU, New Zealand, Australia and others joined the US to accuse Chinese state-sponsored hackers.
Microsoftâs Exchange system powers the email of huge corporations small businesses and public bodies. The hack affected at least 30,000 organisations around the world.
Microsoft blamed a Chinese cyber-espionage group for targeting a weakness in Microsoft Exchange, which allowed hackers to get into email inboxes.
It said the group, known as Hafnium, was state-sponsored and based in China.
Western security sources believe Hafnium knew Microsoft had planned to deal with the weakness, and so shared it with other China-based hackers.
The sources say the hack seems to signal a shift from a targeted espionage campaign to a smash-and-grab raid, leading to concerns that Chinese cyber-behaviour is escalating.
The UK Foreign Office said the Chinese government had âignored repeated calls to end its reckless campaign, instead allowing state-backed actors to increase the scale of their attacksâ.
US President Joe Biden said the Chinese government may not have been carrying out the attacks itself, but was âprotecting those who are doing it. And maybe even accommodating them being able to do itâ.
The US Department of Justice on Monday announced criminal charges against four hackers linked to Chinaâs Ministry of State Security. It said they were connected to a long-term campaign targeting foreign governments and entities in key sectors in a least a dozen countries.
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