12 Nov Lessons Learned From The Biggest Ransomware Attacks
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This week in cybersecurity from the editors at Cybercrime Magazine
Sausalito, Calif. – Nov. 12, 2026
–Read the Full Story in ProLion
Ransomware is the fastest-growing type of cybercrime, and the global cost of ransomware damage is predicted by Cybersecurity Ventures to exceed $265 billion by 2031.
ProLion, developers of CryptoSpike, a solution to protect storage systems from ransomware, explores what really happened in seven of the biggest and most expensive ransomware attacks between 2023 and 2026.
First on the list is Change Healthcare. In Feb. 2024, the giant healthcare payment processor was paralyzed by a ransomware attack that sent shockwaves through the medical system. A ransomware group infiltrated Change’s systems and exfiltrated over 6 terabytes of data, including sensitive health and financial records. The attack severely disrupted claims processing across the country, affecting an estimated 40 percent of all U.S. medical claims and delaying prescription fulfillment, billing, and reimbursements nationwide.
On top of the $22 million ransom payment, the attack caused immense operational and reputational damage. The total cost of the Change Healthcare ransomware attack was reportedly $2.87 billion.
The six other attacks hit Jaguar Land Rover, Marks & Spencer, CDK Global, MGM Resorts, Royal Mail, and Cencora.
These attacks show that any company, in any sector, can fall victim to a ransomware attack and be extorted for millions of dollars. This raises the question, what could the companies in these examples have done differently?
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