Cybercriminals Successfully Encrypted Data In Ransomware Attacks On Nearly 75% Of Healthcare Organizations

Sophos has shared its sector survey report, “The State of Ransomware in Healthcare 2023,” which revealed that, among those organizations surveyed, cybercriminals successfully encrypted data in nearly 75% of ransomware attacks.

This is the highest rate of encryption in the past three years and a significant increase from the 61% of healthcare organizations that reported having their data encrypted last year.

In addition, only 24% of healthcare organizations could disrupt a ransomware attack before the attackers encrypted their data—down from 34% in 2022; this is the lowest rate of disruption reported by the sector over the past three years.

“To me, the percentage of organizations that successfully stop an attack before encryption is a strong indicator of security maturity. However, this number is quite low for the healthcare sector—only 24%. What’s more, this number is declining, which suggests the sector is actively losing ground against cyber attackers and is increasingly unable to detect and stop an attack in progress.

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“Part of the problem is that ransomware attacks continue to grow in sophistication, and the attackers are speeding up their attack timelines. In the latest Active Adversary Report for Tech Leaders, we found that the median time from the start of a ransomware attack to detection was only five days. We also found that 90% of ransomware attacks occurred after regular business hours. The ransomware threat has become too complex for most companies to go it alone. All organizations, especially those in healthcare, need to modernize their defensive approach to cybercrime, moving from being solely preventative to actively monitoring and investigating alerts 24/7 and securing outside help in the form of services like managed detection and response (MDR),” said Chester Wisniewski, director, field CTO, Sophos.

“In 2016, the Red Cross Hospital of Córdoba in Spain suffered a ransomware attack that reached servers and encrypted hundreds of files, medical records, and other important patient information. It was a major disruption to our operations and interfered with our ability to care for our patients. The stakes are high in ransomware attacks against healthcare organizations—and attackers know that—meaning we’ll always be a target. After this ransomware attack, we worked hard with Tekpyme to bolster our defenses, and now we have reduced our incident response time by 80%. I think the industry as a whole is making improvements, but there is still work to do, because of the constantly changing nature of cybercrime. Hopefully, healthcare organizations can leverage the help that is available from security vendors such as Sophos to prevent a genuine ‘threat to life’ if systems go offline due to a ransomware attack,” said José Antonio Alcaraz Pérez, head of information systems and communications at Cruz Red Andalusia in Spain.

“Cyberspace today is ripe with technically sophisticated actors looking for vulnerabilities to exploit. What all this translates to is a multidimensional cyber threat of actors who have the tools to paralyze entire hospitals. Partnering with the private sector is critical to our mission. The information [they] share has real-world impacts and can save real businesses and real lives,” said Christopher Wray, FBI Director.

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