According to BBC, the gang published nearly 400GB of data on the dark web and shared it via their Telegram channel. The leaked data includes patient names, dates of birth, NHS numbers and details of blood tests, as well as Synnovis business accounts.

Qilin launched a ransomware attack against Synnovis on June 3 and blocked its IT systems.

Synnovis, a partnership between European company Synlab, Guy's and St Thomas' Foundation Trust (GSTT) and King's College Trust, is responsible for blood tests, smears, bowel exams and other essential services for hospitals in six London boroughs.

“We know how disturbing this development can be for many people,” Synnovis said in a post on its website on Friday.

“An analysis of this data is already underway. This analysis, which is being carried out in collaboration with the NHS, the National Cyber ​​​​Security Centre and other partners, aims to confirm whether the data was taken from Synnovis' systems and what information it contains.”

According to Synnovis, the attack has already led to the cancellation of hundreds of surgeries, doctor and outpatient appointments, particularly in NHS facilities at the two trust partners' hospitals and the South London and Maudsley NHS Foundation Trust, as well as at GP surgeries in Bexley, Greenwich, Lewisham, Bromley, Southwark and Lambeth.

Qilin, a suspected Russia-based ransomware-as-a-service gang, claimed to have carried out the cyberattack in protest against Britain and its lack of help in an unspecified conflict, telling the BBC: “Our citizens are dying in unequal battles due to a lack of medicine and donor blood.”

However, the group has always been motivated by financial gain during the two years of its attacks, so such claims should be viewed with caution. The group has reportedly demanded a £50 million ransom payment from Synnovis.

Previous victims of Qilin include the French company Robert Bernard, the Australian IT consulting company Dialog, the Victoria Court in Australia and The big problem Publication.

Update 21 June, 15:00

The guard reports that the stolen data released by Qilin contains details of 300 million patient interactions with the NHS and also includes results of blood tests for HIV and cancer.

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