Change Healthcare on Thursday confirmed that ransomware group Blackcat is behind the ongoing cybersecurity attack that’s caused widespread disruptions to pharmacies and health systems across the U.S.
“Our experts are working to address the matter and we are working closely with law enforcement and leading third-party consultants,” Change Healthcare told CNBC in a statement Thursday. “We are actively working to understand the impact to members, patients and customers.”
The company said it’s working with Mandiant, which is owned by Google, and cybersecurity software vendor Palo Alto Networks.
In a since-deleted post on the dark web, Blackcat said Wednesday that it was behind the attack on Change Healthcare’s systems. The group said it managed to extract six terabytes of data, including information like medical records, insurance records and payment information.
Change’s parent company UnitedHealth Group said it discovered that a cyber threat actor breached part of the unit’s information technology network on Feb. 21, according to a filing with the SEC. UnitedHealth isolated and disconnected the impacted systems “immediately upon detection” of the threat, the filing said, but it didn’t disclose the nature of the attack or exactly when it took place.
Blackcat, also called Noberus and ALPHV, steals sensitive data from institutions and threatens to publish it unless a ransom is paid, according to a December release from the U.S. Department of Justice. Blackcat has compromised computer networks across the U.S. and the globe, amounting to hundreds of millions of dollars in losses, the release said.
Change Healthcare offers tools for payment and revenue cycle management that help facilitate transactions like reimbursement payments. In 2022, it merged with the health-care provider Optum, which services more than 100 million patients in the U.S. and is owned by UnitedHealth, the country’s biggest health-care company by market cap.
Brett Callow, a threat analyst at the cybersecurity company Emsisoft, said ransomware groups will often make posts like these in an effort to bring victims to the negotiating table. Callow, who specializes in ransomware, shared a screenshot of Blackcat’s deleted post to the social media site X on Wednesday.
He said ransomware groups often exaggerate the amount of data they’ve stolen, so Blackcat’s claims should be treated with skepticism. It can take weeks for an organization to determine exactly what information was stolen, he added, and ransomware groups often use the period of uncertainty to their advantage.
“Cybercriminals, they’re not going to tell the truth,” Callow told CNBC in an interview.
UnitedHealth said in its filing with the SEC that it suspected a nation-state-associated actor was behind the attack, but Callow said Blackcat is a for-profit cybercrime operation. He called the discrepancy “peculiar,” but said there might be more to the breach that he doesn’t know about.
Ransomware attacks can be particularly dangerous within the health-care sector, as they can cause immediate harm to patients’ physical safety, said John Riggi, national advisor for cybersecurity and risk at the American Hospital Association.
When systems go dark, diagnostic technologies like CT scanners can go offline, and ambulances carrying patients are often diverted, which can delay lifesaving care, he said.
“Change, they’re a victim,” Riggi told CNBC. “Ultimately, though, this was not an attack just on them, this was an attack on the entire health-care sector.”
Change Healthcare’s systems have been down for nine straight days, and it’s unclear when they will come back online.
A Tesla robotaxi drives on the street along South Congress Avenue in Austin, Texas, U.S., June 22, 2025.
Joel Angel Juarez | Reuters
Tesla is recruiting test drivers in New York to operate cars with “automated driving systems,” but the company hasn’t applied for the permits it would need to test autonomous vehicles in the nation’s largest city.
A job opening on Tesla’s website says the company is looking to hire vehicle operators in the borough of Queens. The hires will be “responsible for driving an engineering vehicle for extended periods, conducting dynamic audio and camera data collection for testing and training purposes.”
A spokesperson for the New York City Department of Transportation told CNBC on Monday that Tesla has not applied for approvals to test AVs on city streets in New York. InsideEVs, an electric vehicles news site, previously reported that Tesla was hiring test drivers for its robotaxis in Brooklyn.
Any company that obtains a permit to test AVs in New York has to keep “a trained safety driver behind the wheel, ready to take control of an AV-enabled vehicle at all times,” according to the DOT spokesperson.
Tesla didn’t respond to a request for comment.
Alphabet’s Waymo, the robotaxi leader in North America, has applied to test its AVs in New York, but its application remains under review, the DOT said Monday.
Tesla CEO Elon Musk has been trying to sell investors on a future for his company that’s built around AI and robotics, rather than sales of its existing vehicles. But Tesla still earns almost all of its revenue from sales of EVs and battery energy storage systems.
Tesla’s EV sales have been on the decline this year, especially in Europe, partly due to Musk’s decision to focus on the Cybertruck, rather than producing a more affordable EV with mainstream appeal. Some of the company’s struggles are the result of a political backlash against Tesla because of Musk’s incendiary political rhetoric, work with President Donald Trump, and endorsements of Germany’s anti-immigrant AfD party.
Along with its recruiting efforts in Queens, Tesla is also seeking to hire test drivers for its Autopilot team to gather data from drives in cities and suburbs of Dallas, Houston, Tampa, Orlando and Miami, as well as Palo Alto, California, home to Tesla’s engineering headquarters.
The current listings on Tesla’s website say Autopilot vehicle operators may need to travel to international and domestic destinations and must be familiar with “automated driving systems,” suggesting planned or ongoing testing of Tesla’s robotaxi and FSD or Full Self Driving system, currently marketed as FSD Unsupervised in the U.S.
Tesla notched a win in Texas last week, obtaining a permit to run a ride-hailing service in the state. The Tesla Robotaxi LLC permit and state regulations do not require Tesla to keep a human safety driver on board.
However, Tesla has been operating a fleet of robotaxis in Austin since late June, with employees riding in the front passenger seat, tasked with manually intervening during a trip if necessary. The service has only been accessible to invited users. Musk said in a post on X over the weekend that he intends for the Austin service to open to the general public next month.
In San Francisco, Tesla is also operating a limited, manned car service but promoting it as “autonomous ride-hailing.”
Musk posted last week that the company is “working as quickly as possible to get 100+ Teslas operating for autonomous ride-hailing (can’t use the word “taxi” or “cab” in California) in the Bay Area and allow anyone to request a ride.”
The company is not authorized to carry passengers on public roads in autonomous vehicles in California, the California Public Utilities Commission told CNBC in a recent email.
Tesla’s approach to AVs has drawn federal probes, product liability lawsuits and recalls following injurious or damaging collisions that occurred while drivers were using the company’s Autopilot or FSD systems.
The California DMV previously sued Tesla, accusing it of false advertising around its driver assistance systems.
While Tesla owners manuals say the Autopilot and FSD features in their cars are “hands on” systems that require a driver ready to steer or brake at any time, Tesla and Musk have shared statements through the years saying that a Tesla can “drive itself.”
Nikoli’s president, Yoshinao Anpuku, poses for a photo at Nikoli headquarters in Tokyo on March 19, 2025. LinkedIn worked with Nikoli and Sudoku champion Thomas Snyder to launch its Mini Sudoku game.
Nikoli
LinkedIn on Tuesday released a new game for the professional social networking app’s 1.2 billion users. It’s a miniature version of Sudoku, an old game with a rich history.
The new Mini Sudoku is LinkedIn’s sixth game. It’s scaled down from the traditional 9-by-9 grid and meant to be completed in two or three minutes.
“We don’t want to have a puzzle on LinkedIn that takes 20 minutes to solve, right?” said Lakshman Somasundaram, a senior director of product at the Microsoft subsidiary, in an interview with CNBC. “We’re not games for games’ sake.”
The introduction has the potential to strike a nostalgic chord and spark competition with colleagues, friends and family members for how fast the puzzle can be solved.
As with other puzzles in the app, Mini Sudoku gets harder as the days progress through the week.
LinkedIn added games last year to increase the fun and give users something new to talk about with one another.
Millions of people play LinkedIn’s games every day, a spokesperson said. The most popular time is 7 a.m. ET, and Gen Z is the top demographic. Of those who play today, 86% will return tomorrow, and 82% will be playing next week, the spokesperson said.
Launched in 2003 and acquired by Microsoft for $27 billion in 2016, LinkedIn remains in growth mode. Revenue increased about 9% to $4.6 billion in the latest quarter and membership reached 1.2 billion. Meta‘s social networks are more popular, with a combined 3.5 billion daily users and 22% revenue growth.
Unlike Meta, LinkedIn gives recruiters tools for finding candidates, and job seekers can apply for openings listed on the site. LinkedIn also now promotes a personalized feed of videos, similar to Google’s YouTube, TikTok and Meta’s own Facebook and Instagram.
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Making the game
LinkedIn’s development of the game resulted from an encounter with Japanese publisher Nikoli, which popularized Sudoku.
Somasundaram and a band of LinkedIn associate product managers visited Nikoli’s Tokyo headquarters late last year and spoke through a translator about puzzles with the publisher’s employees. That led to weeks of meetings involving LinkedIn, Nikoli and Thomas Snyder, a three-time World Sudoku Championship winner who has helped LinkedIn with its gaming strategy.
The group hoped to make Sudoku more accessible, building several prototypes before landing on the board with six rows and six columns of squares.
“It’s very easy to just make a Sudoku grid,” Snyder said. “It’s very hard to make art in the form of Sudoku. And that’s what both Nikoli and we do.”
Snyder is founder and CEO of Grandmaster Puzzles, a publisher of Sudoku books. With a Ph.D. in chemistry, he goes by the nickname Dr. Sudoku and has contributed to the hint feature in LinkedIn’s Mini Sudoku and constructed some of the puzzles. With each day’s puzzle, there will be a video showing how Snyder solves it.
“I think it’s got the potential to be the largest of the games, just because it’s going to have a lot of brand awareness from moment one,” he said.
Sudoku’s history
Howard Garns, an architect from Indiana, came up with a game called “Number Place” that required people to fill in a grid with numbers from one to nine. No number can be repeated in a row or column, and all nine numbers must appear just once in each of the nine 3-by-3 grids that make up the puzzle.
Number Place debuted in the magazine Dell Pencil Puzzles & Word Games in 1979. It only took off after Nikoli included a spin on the puzzle in the October 1984 issue of Puzzle Communication Nikoli under the name “Suji wa dokushin ni kagiru,” which means “The numbers must be single,” a Nikoli spokesperson told CNBC in an email.
Readers abbreviated the puzzle’s name, calling it Sudoku.
At first, the publisher employed both the long name and the shorter Sudoku title in Puzzle Communication Nikoli. In 1992 Nikoli started using only the Sudoku name, the spokesperson said.
U.S. and European newspapers began publishing Sudoku puzzles in the mid-2000s. Sudoku joined The New York Times’ NYT Games app, which boasts 10 million daily users, in 2023. More than 100 media companies have licensed Nikoli’s Sudoku puzzles, the spokesperson said.
“The daily puzzles will only be available on LinkedIn each day, but we are looking forward to republishing selected puzzles from those in our magazine,” the spokesperson wrote.
As of July 25, porn sites are required to implement effective age verification methods for U.K. users.
Jack Taylor | Getty Images
It was well intentioned but a U.K. law mandating age verification on adult sites and a number of other platforms has sparked a backlash from both internet users in the country, and U.S. politicians and tech giants.
Last month, new provisions in the Online Safety Act requiring large online platforms to implement age checks to prevent children from accessing pornographic and appropriate material came into force.
The measures have led PornHub, RedTube and other porn sites to force U.K. visitors to sign up and verify their age to gain access to their services.
What is the Online Safety Act?
Broadly, the Online Safety Act is a law that imposes a duty of care on social media firms and other user-generated content sites to ensure they take responsibility for harmful content uploaded and spread on their platforms.
In particular, the legislation aims to prevent children from being exposed to pornographic content and material that promotes suicide, self-harm, eating disorders or abusive and hateful behaviour.
The regulation has been years in the making and faced numerous delays in its development — not least due to concerns that it may infringe internet users’ right to privacy and result in censorship.
Why has it led to backlash?
The latest measures have been imposed with the aim of ensuring children aren’t able to view harmful and inappropriate content.
However, they have led to complaints from internet users due to the requirement of having to share personal information such as their ID, credit card details and selfies — in some cases for platforms that don’t even qualify as porn sites.
Spotify, Reddit, X and a number of other platforms have introduced their own respective age verification systems to stop users under the age of 18 from consuming explicit content.
These moves have subsequently led to providers of virtual private networks (VPNs) to report that their services, which allow users to mask their location, are surging in the U.K.
Meanwhile, on Monday, Wikipedia was dealt a legal blow in the U.K. as a High Court judge ruled the platform should be treated as a “category one” service, which would subject to certain user verification requirements.
The Online Safety Act requires category one platforms to offer users the ability to verify their identity and access tools that reduce their exposure to content from non-verified users.
Wikimedia, the parent company of Wikipedia, has said previously that it could limit visitor numbers from the U.K. in order to exempt it from category one status.
U.S. politicians weigh in
A number of U.S. politicians have blasted the new rules in recent days. Last week, Vice President JD Vance — who has previously criticized the U.K.’s internet safety rules — again raised concerns with the law, fearing it could unfairly restrict American tech companies.
“I just don’t want other countries to follow us down what I think was a very dark path under the Biden administration,” Vance told reporters during a trip to the country last week.
House Judiciary Chairman Jim Jordan, R-Ohio, who also visited the U.K. recently, said in a statement after his return that sweeping online safety laws in Europe are having “a serious chilling effect on free expression and threaten the First Amendment rights of American citizens and companies.”
There has been speculation over whether the U.S. may press Britain to relax the regulations during trade talks — however, U.K. officials say the issue is not open to debate.
Could other countries follow suit?
Other countries are already adopting their own respective internet age verification laws.
Australia and Ireland have both passed similar age verification measures, while Denmark, Greece, Spain, France and Italy have started testing a common age verification app to protect users online.
In the U.S., Louisiana passed a law in 2022 requiring age verification on websites where at least a third of the content is of an adult nature, while several other states are seeking to pass similar legislation.