China accused of cyber-attack on Microsoft Exchange servers

The UK, US and EU have accused China of carrying out a major cyber-attack earlier this year.

The attack targeted Microsoft Exchange servers, affecting at least 30,000 organisations globally.

Western security services believe it signals a shift from a targeted espionage campaign to a smash-and-grab raid, leading to concerns Chinese cyber-behaviour is escalating.

The Chinese Ministry of State Security (MSS) has also been accused of wider espionage activity and a broader pattern of “reckless” behaviour.

China has previously denied allegations of hacking and says it opposes all forms of cyber-crime.