Feds Issue Interlock Ransomware Warning as Healthcare Attacks Spike
The U.S. Cybersecurity and Infrastructure Security Agency (CISA), Federal Bureau of Investigation (FBI), Department of Health and Human Services (HHS), and the Multi-State Information Sharing and Analysis Center (MS-ISAC) have issued a joint alert about the Interlock ransomware group, which has accelerated attacks on businesses and critical infrastructure organizations. The alert shares the latest tactics, techniques, and procedures (TTPs) and indicators of compromise (IoCs) collected from investigations of the group’s ransomware attacks in June 2025. Interlock is a ransomware-as-a-service operation that first emerged in September 2024. The group has attacked entities in multiple sectors but appears to favor organizations in the healthcare and public health (HPH) sector. Healthcare victims include the kidney dialysis giant DaVita, Texas Tech University Health Sciences Center, Kettering Health, Drug and Alcohol Treatment Services, Brockton Neighborhood Health Center, and Naper Grove Vision Care. Interlock is a financially motivated cybercriminal group that uses ransomware in its...
Premier Health Partners Announces July 2023 Data Breach
Premier Health Partners, a Dayton, OH-based network of three hospitals and two major medical centers, has recently issued a press release about a data breach first identified over two years ago. The July 18, 2025, press release explains that on July 12, 2023, Premier Health identified suspicious activity within certain computer systems. An investigation was launched, which confirmed that an unauthorized third party had access to its systems between July 7, 2023, and July 12, 2023, during which time files were acquired from its network. The files were reviewed to determine if any sensitive information had been compromised, and it was confirmed that the exposed data included names, dates of birth, driver’s license numbers, Social Security numbers, passport numbers, taxpayer identification numbers, digital signatures, login credentials, financial account information, medical information, and health insurance information. Premier Health said the security incident did not have any impact on its services, which remained fully operational throughout. Notification letters have been mailed...
Montana Mental Health Center Announces 87,000-Record Data Breach
Western Montana Mental Health Center has notified almost 87,000 individuals about a September 2024 cyberattack, and Olde Towne Medical and Dental Center has announced that it fell victim to an Inc Ransom ransomware attack in May 2025. Western Montana Mental Health Center Western Montana Mental Health Center (WMMHC), a provider of community mental health services at 15 locations throughout western Montana, announced a security incident on July 17, 2025, that involved unauthorized access to the protected health information of up to 86,758 individuals. An investigation was launched on September 15, 2024, in response to an incident that caused network disruption. Assisted by third-party cybersecurity experts, WMMHC determined there had been unauthorized access to its network. The notification letters do not state when hackers first gained access to its network. A review of files on the compromised parts of the network was initiated and concluded on May 27, 2025. The exposed data included names, Social Security numbers, driver’s license numbers, dates of birth, state or federal...
Cierant Corporation Announces 232,500-Record Data Breach
Cierant Corporation, a Danbury, CT-based distributed marketing software and services company, has recently disclosed a data incident that has affected 232,506 individuals. The data breach was reported separately by its client, Blue Cross and Blue Shield of Massachusetts (BCBSM), as affecting 4,855 of its members. Cierant explained that it detected a vulnerability in the Cleo VL Trader managed file transfer solution on December 10, 2024. An industry-leading cybersecurity firm was engaged to assist with the investigation and confirmed that the vulnerability had been exploited by a threat actor, resulting in unauthorized access to Cierant’s systems. Cierant did not state what vulnerability was exploited or initial access. Two vulnerabilities affecting Cleo products were publicly disclosed in December 2024, around the time that the data breach occurred: CVE-2024-50623 and CVE-2024-55956. The first vulnerability allowed files to be uploaded and downloaded from Cleo software. Malicious files could be uploaded that could allow remote code execution. The second vulnerability allows...
Florida Gastroenterology Practice Settles Data Breach Class Action Complaint
Gastroenterology Associates of Central Florida PA, which does business as the Center for Digestive Health, has agreed to settle a class action lawsuit stemming from a data breach discovered in April 2024. A security breach was identified on April 11, 2024, and the forensic investigation confirmed unauthorized network access and data exfiltration. The affected individuals had received services from the Center for Digestive Health or the Center for Digestive Endoscopy, and the HHS’ Office for Civil Rights was notified that 121,693 individuals were affected. Complimentary credit monitoring and credit score services were offered to the affected individuals, who were notified by mail in February 2025. Class action lawsuits were filed in the Orange County Circuit Court in Florida by plaintiffs Donald Cobean, Kimberly Leszczynski, Lyla Natal, Catherine Sanders, Wanda Moyano, Sharon Hoffmann, and George Hoffmann, individually and on behalf of similarly situated individuals. All parties agreed that Broward County was a more appropriate location, and the six lawsuits were dismissed without...



