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US stocks plunge amid coronavirus variant fears – as it happened
S&P 500 and Dow Jones Industrial Average both down more than 2% by midday with Dow on track for its worst day in nearly nine months

Julia Carrie Wong and Vivian Ho

20, Jul, 2021 @12:17 AM

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UK and allies accuse Chinese state-backed group of Microsoft hack
British foreign secretary says Beijing will be held to account if it does not stop ‘systematic cyber sabotage’

Dan Sabbagh, Jennifer Rankin and Peter Walker

19, Jul, 2021 @2:21 PM

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What is the Hafnium Microsoft hack and why has the UK linked it to China?
Britain has joined the US and other allies in formally accusing China of being behind the cyber-attack

Alex Hern

19, Jul, 2021 @1:13 PM

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The person to ‘weaken’ America: what the Kremlin papers said about Trump
Documents appear to show how Russian intelligence worked to install their preferred candidate as president

Luke Harding and Dan Sabbagh

15, Jul, 2021 @5:05 PM

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Israeli spyware firm linked to fake Black Lives Matter and Amnesty websites – report
Researchers say web domains masquerading as activist, health and media groups are used by governments to hack targets

Sam Levin in Los Angeles

15, Jul, 2021 @3:18 PM

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‘Cyber-attack’ hits Iran’s transport ministry and railways
Message boards in train stations show cancellations though rail operator denies disruptions

Staff and agencies

11, Jul, 2021 @12:51 AM

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Who’s behind the Kaseya ransomware attack – and why is it so dangerous?
The breach has affected hundreds of businesses around the world, and experts fear the worst is yet to come

Kari Paul in San Francisco

07, Jul, 2021 @5:00 AM

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Republican National Committee denies Russian hackers accessed data
Report says RNC computers were breached by Cozy Bear hackers, accused of DNC hack in 2016

Kari Paul and agencies

06, Jul, 2021 @11:24 PM

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Latest ransomware attack appears to hit hundreds of American businesses
The US cybersecurity agency said it was investigating the attack after an incident at the Miami-based IT firm Kaseya

Guardian staff and agencies

03, Jul, 2021 @12:01 AM

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How remote work opened the floodgates to ransomware
With workers outside the ‘castle walls’ of their companies, criminals have it easier – and cryptocurrency hasn’t helped

Kari Paul

17, Jun, 2021 @10:00 AM

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Age of the cyber-attack: US struggles to curb rise of digital destabilization
The ransomware attack that caused long lines for fuel on the east coast was just part of a dramatic change in the scale and nature of foreign-based threats

Dominic Rushe in New York and Julian Borger in Washington

14, Jun, 2021 @6:00 AM

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Ransomware is biggest online threat to people in UK, spy agency chief to warn
GCHQ cybersecurity boss sounds alarm over extortion by hackers who are mostly based in former Soviet states

Dan Sabbagh Defence and security editor

13, Jun, 2021 @11:01 PM

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