Microsoft: China-based hackers found bug to target US firms
Microsoft says China-based government hackers have exploited a bug in its email server software to target U.S. organizations
Your support helps us to tell the story
From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.
At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.
Your support makes all the difference.China-based government hackers have exploited a bug in Microsoft s email server software to target U.S. organizations, the company said Tuesday.
Microsoft said that a “highly skilled and sophisticated” state-sponsored group operating from China has been trying to steal information from a number of American targets, including universities, defense contractors, law firms and infectious-disease researchers.
Microsoft said it has released security upgrades to fix the vulnerabilities to its Exchange Server software, which is used for work email and calendar services, mostly for larger organizations that have their own in-person email servers. It doesn't affect personal email accounts or Microsoft's cloud-based services.
The company said the hacking group it calls Hafnium was able to trick Exchange servers into allowing it to gain access. The hackers then masqueraded as someone who should have access and created a way to control the server remotely so that they could steal data from an organization's network.
Microsoft said the group is based in China but operates from leased virtual private servers in the U.S., helping it avoid detection.
The company based in Redmond, Washington, declined to name any specific targets or say how many organizations were affected.
Reston, Virginia-based cybersecurity firm Volexity, which Microsoft credits for helping to detect the intrusions, said its network security monitoring service began picking up on a suspiciously large data transfer in late January.
“They’re just downloading email, literally going to town," said Steven Adair, Volexity's president, who said the targets have included “defense contractors, international aid and development organizations, the NGO think-tank community."
Adair said he's concerned that the hackers will accelerate their activity in the coming days before organizations are able to install Microsoft's security upgrades.
“As bad as it is now, I think it’s about to get a lot worse," he said. “This gives them a limited amount of opportunity to go and exploit something. The patch isn’t going to fix that if they left their backdoor behind."