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Microsoft Says Chinese Hackers Targeted Groups via Server Software

ThinkCivics Newswire by ThinkCivics Newswire
March 4, 2021
in Science & Tech
Reading Time: 2 mins read
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Microsoft Says Chinese Hackers Targeted Groups via Server Software

WASHINGTON—A China-linked cyber-espionage group has been remotely plundering email inboxes using freshly discovered flaws in Microsoft mail server software, the company and outside researchers said on Tuesday—an example of how commonly used programs can be exploited to cast a wide net online.

In a blog post, Microsoft said the hacking campaign made use of four previously undetected vulnerabilities in different versions of the software and was the work of a group it dubs HAFNIUM, which it described as a state-sponsored entity operating out of China.

In a separate blog post, cyber-security firm Volexity said that in January it had seen the hackers use one of the vulnerabilities to remotely steal “the full contents of several user mailboxes.” All they needed to know were the details of Exchange server and of the account they wanted to pillage, Volexity said.

Microsoft sign in Los Angeles
The Microsoft sign is shown on top of the Microsoft Theatre in Los Angeles, Calif., on Oct. 19, 2018. (Mike Blake/File/AP)

Ahead of the Microsoft announcement, the hackers’ increasingly aggressive moves began to attract attention across the cybersecurity community.

Mike McLellan, director of intelligence for Dell Technologies Inc’s Secureworks, said ahead of the Microsoft announcement that he had noticed a sudden spike in activity touching Exchange servers overnight on Sunday, with around 10 customers affected at his firm.

Microsoft’s suite of products has been under scrutiny since the hack of SolarWinds, the Texas-based software firm that served as a springboard for several intrusions across government and the private sector. In other cases, hackers took advantage of the way customers had set up their Microsoft services to compromise their targets or dive further into affected networks.

Hackers who went after SolarWinds also breached Microsoft itself, accessing and downloading source code—including elements of Exchange, the company’s email, and calendaring product.

McLellan said that for now, the hacking activity he had seen appeared focused on seeding malicious software and setting the stage for a potentially deeper intrusion rather than aggressively moving into networks right away.

“We haven’t seen any follow-on activity yet,” he said. “We’re going to find a lot of companies affected but a smaller number of companies actually exploited.”

Microsoft said targets included infectious disease researchers, law firms, higher education institutions, defense contractors, policy think tanks, and non-governmental groups.

By Raphael Satter and Christopher Bing

This article was originally published by the Epoch Times. Read the original article.

ThinkCivics Newswire

ThinkCivics researches, examines, and reports on issues that matter most. We deliver explanative, fearless, and insightful analysis for public consumption.

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Tags: BusinessChinaChina-US NewsChineseChinese RegimeCompaniesCrime and IncidentshackersmicrosoftserversoftwareTechTech NewsUSUS News

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