Latest cybersecurity reporting from selected sources.

A U.S. government agency paid $1M to Kairos, a group focused on data theft and extortion rather than ransomware, Ransom-ISAC reports. A new case study from Ransom-ISAC reconstructs a complete data-extortion incident involving a U.S. government body and a threat actor called Kairos, using a leaked negotiation transcript and blockchain tracing of the ransom payment. […]

The Iranian state-sponsored hacking group known as MuddyWater (aka Mango Sandstorm, Seedworm, and Static Kitten) has been attributed to a ransomware attack in what has been described as a "false flag" operation

Cybercrime Group First Listed Ohio Health System as a Data Theft Victim Last JuneOhio-based Kettering Health is notifying current and former patients and "affiliates" that their personal, health and financial information was potentially compromised in a May 2025 ransomware attack and data theft incident claimed by cybercriminal gang Interlock.

Nike is investigating what it described as a "potential cyber security incident" after the World Leaks ransomware gang leaked 1.4 TB of files allegedly stolen from the sportswear giant. [...]

Ransomware Gang Money Message Claimed It Exfiltrated 4.7TB of Firm's DataPharmacy services firm PharMerica will pay at least $5.27 million - plus millions more on enhancing its security - as part of a preliminary class action settlement approved this week by a federal court involving a 2023 data theft incident the company reported as affecting 5.8 million individuals.

The Kyowon Group (Kyowon), a South Korean conglomerate, disclosed that a cyberattack has disrupted its operations and customer information may have been exposed in the incident. [...]

Ransomware Gang Qilin Had Claimed It Stole 852 GB of Health System's DataNearly half a million patients of a Catholic healthcare network that serves New England and parts of Pennsylvania began the new year by receiving notifications that hackers may have stolen their health information in a May 2025 hacking incident.

Ransomware Gang Rhysida Leaks 3.7TB of Data Stolen From Maryland Hospital SystemMaryland-based MedStar Health, which operates 10 hospitals, is notifying patients about a data theft incident affecting their personal information. Ransomware group Rhysida claims on its darkweb leak site to have 3.7 terabytes of MedStar's data, including "over 7 million pieces of patient data."

Class Members Can Claim Up to $5K Each for Documented Losses Tied to BreachA small, rural county-owned Georgia community hospital has agreed to settle consolidated class action litigation involving a 2024 hacking incident in which ransomware gang Embargo claimed to have stolen 1.15 terabytes of the organization's data and leaked it on the darkweb.

Inotiv Tells SEC 'It's Still Evaluating Full Impact and Notifying Breach Victims'Drug research firm Inotiv in a filing with federal regulators said it is still evaluating the financial and operational impact of an August cyberattack that's linked to ransomware gang Qilin. The company is also notifying nearly 10,000 people whose data was allegedly stolen in the incident.

Nevada’s CIO confirmed in a press conference that ransomware actors had exfiltrated data from state networks, amid an ongoing incident investigation

Support Portals Offline as Ransomware Gang Claims It Stolen DataBritish-based multinational telecom Colt Technology Services said a "cyber incident" is responsible for days-long disruptions to its customer portal and support services. The WarLock ransomware operation took responsibility for the hack, asserting it stole "1 million documents."

The incident, reported to be ransomware-related, has resulted in attackers stealing sensitive personal and clinical data, including lab test results

IdeaLab is notifying individuals impacted by a data breach incident last October when hackers accessed sensitive information. [...]

Horizon Healthcare RCM Hints at Paying Ransom in Data Theft IncidentHorizon Healthcare RCM is the latest revenue cycle management software vendor to report a health data breach involving ransomware and data theft. The firm's breach notification statement suggests that the company paid a ransom to prevent the disclosure of its stolen information.

Did Marlboro-Chesterfield Pathology Pay Cybercrime Gang Safepay a Ransom?A North Carolina pathology practice is notifying nearly 236,000 patients of a hacking incident discovered in January. Marlboro-Chesterfield Pathology says it "took steps" to ensure the hackers deleted its stolen data. Newcomer ransomware group Safepay is apparently the culprit in the attack.

2.3 TB held to ransom as biz formerly known as Virgin Care tells us it's probing IT 'security incident' Exclusive HCRG Care Group, a private health and social services provider, has seemingly fallen victim to the Medusa ransomware gang, which is threatening to leak what's claimed to be stolen internal records unless a substantial ransom is paid.…

Data Theft Incident Also Disrupted IT Systems for Nearly a MonthRichmond University Medical Center, a 440-bed teaching hospital on Staten Island, N.Y, is notifying 674,000 people of a data theft that happened 18 months ago. The breach was part of a ransomware attack that disrupted the organization's IT systems for several weeks in spring 2023.

Missouri-Based Hospital Chain Initially Reported That Attack Affected Only 500Seven months after a ransomware disrupted its IT systems for weeks, Catholic hospital chain Ascension Health is now notifying nearly 5.6 million current and former patients and employees that the incident - which also involved data theft - potentially compromised their information.

Sounds like th-aorta get this sorted quickly A manufacturer of devices used in heart surgeries says it's dealing with "a cybersecurity incident" that bears all the hallmarks of a ransomware attack.…