How the ransomware attack at Change Healthcare went down – a timeline


A ransomware attack earlier this year on UnitedHealth-owned health tech company Change Healthcare likely stands as one of the largest data breaches of U.S. health and medical data in history.

Months after the February data breach, a “substantial proportion of people living in America” are receiving notice by mail that their personal and health information was stolen by cybercriminals during the cyberattack on Change Healthcare. At least 100 million people are now known to be affected by the breach. Change Healthcare processes billing and insurance for hundreds of thousands of hospitals, pharmacies and medical practices across the U.S. healthcare sector. As such, it collects and stores vast amounts of highly sensitive medical data on patients in the United States.

Read more…
Source: TechCrunch


Sign up for our Newsletter


Related:

  • Medical records, SSNs, and bank details exposed in CareCloud data breach

    August 21, 2026

    Healthcare technology giant CareCloud has confirmed that a data breach earlier this year impacted more than 3.75 million people, making it one of the largest healthcare data incidents disclosed this year. The New Jersey-based company, which provides electronic health record (EHR) and practice management services, first flagged the intrusion in an SEC filing back in March, but the true scope ...

  • CareCloud confirms 3.7M patients had their medical records stolen in data breach

    August 19, 2026

    Hackers have stolen the personal information and medical records of more than 3.75 million people in a data breach at health data giant CareCloud, the company has confirmed with federal regulators. The disclosure marks the first confirmation of the scale of the data breach, which is now confirmed to be the fifth-largest theft of health ...

  • Security researchers scanned the Polish web and found courts, hospitals, and airports at risk of hacks

    August 7, 2026

    Two Polish security researchers wanted to find out how vulnerable their country’s internet was to potential cyberattacks and quickly found that thousands of public agencies and websites were at risk of being hacked. At the Def Con cybersecurity conference in Las Vegas on Friday, security researchers Robert Kruczek and Kamil Szczurowski said they wanted to understand ...

  • Intrusion at US healthcare software provider puts 3.8M people’s data at risk

    August 7, 2026

    A US healthcare software provider has admitted that hackers may have made off with sensitive data belonging to 3.8 million people, making it the largest healthcare breach reported to regulators so far this year. The attack dates to last October, when Ohio-based medical software maker Unlimited Technology Systems (UTS) detected someone poking around its commercial datacenter. ...

  • Healthcare giant Abbott probes two cyber incidents amid extortion claims

    July 20, 2026

    Abbott Laboratories, one of the world’s largest healthcare and medical device companies, is investigating two apparently unrelated cyber incidents after confirming unauthorized access to internal systems. While Abbott says there has been no impact on manufacturing, laboratory operations, or patient care, cybercriminal groups ShinyHunters and ShadowByt3$ claim the breaches were far more extensive. Those claims ...

  • AdaptHealth says attackers sweet-talked their way into cloud systems and stole patient data

    July 3, 2026

    AdaptHealth says attackers used social engineering to breach its systems and steal sensitive patient data, including passwords associated with insurance billing. The medical equipment company disclosed the attack to the Securities and Exchange Commission (SEC) on Thursday, noting that attackers accessed internal patient management systems, document storage platforms, and external electronic health record system portals. The attack targeted an ...