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Also: UnitedHealth Breach Now Affects Over Half of US PopulationIn this week's update, ISMG editors discussed two major stories shaking the tech and cybersecurity worlds - China's AI leap with DeepSeek, a new open-source bot that wiped $600 billion off of Nvidia's value, and an update on the massive UnitedHealth breach, which now affects 190 million people.

Also: Infostealer Malware Compromises Mexican Government ComputersThis week, DeepSeek exposed sensitive data, hackers exploited unpatched Zyxel flaws, infostealer malware on Mexican government computers, Smiths Group incident, PowerSchool breach notifications, an Apple zero-day, XWorm RAT backdoor, and Credit Control Corporation settled a lawsuit.

7 Proposed Class Actions Filed Against Allegheny Health Network and IntraSystemsA Pittsburgh-based healthcare system and its Massachusetts-based IT services firm are facing at least seven proposed federal class action lawsuits involving a data theft - reported on Jan. 17 - affecting about 293,000 people. The hack is the latest major breach involving a business associate.

Identity Theft Resource Center's Lee on Lessons Learned From 2024 Mega-BreachesSix mega cybersecurity incidents led to a record 1.7 billion data breach notices going out to victims in 2024 - a dramatic 312% increase over the previous year. Identity Theft Resource Center President James E. Lee says the increase exposes industry-wide failures in basic cybersecurity practices.

Experts Explain Complexity of Company's Massive Data Breach Analysis EndeavorUnitedHealth Group says its previously eye-popping estimate of 100 million people affected by last year's attack on its Change Healthcare unit nearly doubled in recent months to a staggering 190 million victims. Why did it take so long for the company to figure out the extent of the compromise?

Identity Theft Resource Center Catalogs 3,158 Known US Incidents in 2024The number of U.S. organizations falling victim to a data breach appears to be holding steady, as viewed on an annual basis, according to the latest annual data breach report from the Identity Theft Resource Center, which counted 3,158 reported data breaches in 2024, down just 1% from 2023.

Focus on Pre-Breach Resilience and Post-Breach Recovery Via Mapping DependenciesBy acquiring vArmour’s intellectual property, Phoenix 24 will enhance its recovery services with advanced application visualization and dependency mapping. CEO Mark Grazman said the move will streamline recovery processes during ransomware attacks and improve organizational readiness.

Cost of Attack Has Reached $3.1 Billion for Parent Company UnitedHealth GroupOne of the biggest data breaches of 2024 is even worse than previously reported, as the tally of Change Healthcare breach victims has now reached 190 million individuals, and costs tied to the attack $3.1 billion, according to its owner, U.S. health insurance giant UnitedHealth Group.