Barts Health NHS Trust has confirmed that the data breach at Barts Health was carried out by the Russian-speaking Cl0p ransomware group, which exploited a vulnerability in Oracle E-Business Suite. The Barts Health data breach involved the theft of files from one of the trust’s invoice databases, exposing information linked to payments for treatment and other services, some dating back several years.
In its official notification, the trust stated, “As a result of a recent incident involving data from our trust, we are informing those potentially affected that there is a risk some personal data is compromised.”
The trust confirmed that the criminal group stole files containing names and addresses of individuals required to pay for treatment or services at a Barts Health hospital. These files were later posted on the dark web. Barts Health emphasized that it is pursuing legal remedies, noting, “We are taking urgent action and seeking a High Court order to ban the publication, use or sharing of this data by anyone.”
Details of the Barts Health Data Breach and Exposed Information
The cyberattack on Barts Health occurred after Cl0p exploited a flaw in Oracle E-Business Suite, a widely used system for automating business processes. Oracle has since corrected the vulnerability, which has affected multiple organizations globally.
The trust has reported the Barts Health data breach to NHS England, the National Cyber Security Centre, the Metropolitan Police, and the Information Commissioner’s Office. Despite the intrusion, Barts Health stressed that core healthcare systems remain secure: “Please note our electronic patient record and clinical systems are not affected, and we are confident our core IT infrastructure is secure.”
Paying patients are encouraged to review their treatment invoices to understand which details may have been exposed. Some former employees also appear in the files due to outstanding salary sacrifice amounts or overpayments. Nearly half of the compromised records relate to suppliers whose information is already publicly accessible.
The affected database also contains accounting files that Barts Health has managed since April 2024 for Barking, Havering, and Redbridge University Hospitals NHS Trust. Both trusts are coordinating efforts to limit the impact.
Timeline of the Breach and Potential Risks to Individuals
Although the theft occurred in August, Barts Health did not receive any indication that data had been compromised until November, when the files were uploaded to the dark web. None of the information has emerged on the open internet, restricting exposure to individuals with access to encrypted and compressed files on the dark web.
The trust warned that the stolen files cannot grant direct access to personal accounts but may help criminals craft scams to trick victims into sharing sensitive information or making payments. Individuals with concerns are advised to contact the trust’s data protection officer or consult national guidance such as “Stop! Think Fraud – How to stay safe from scams.”
Barts Health apologized for the incident, stating, “We are very sorry that this has happened and are taking steps with our suppliers to ensure that it could not happen again.”
The Cl0p ransomware group is a well-known cybercriminal syndicate recognized for its multilayer extortion operations, including encryption-less ransomware tactics. Responsible for extorting more than $500 million in ransom payments worldwide, Cl0p became prominent in 2019 through extensive phishing campaigns and malware. The group frequently exploits zero-day vulnerabilities, enabling high-impact attacks and ransom demands.