Mass Ransomware Hack Used IT Software Flaws, Researchers Say

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The findings differentiate the latest incident — which cybersecurity firm Huntress Labs Inc. said affected more than 1,000 businesses — from other recent assaults on the software supply chain. For instance, an attack the U.S. blamed on Russia’s foreign intelligence service, disclosed in December, involved altered software updates from another provider of IT management software, Austin, Texas-based SolarWinds Corp. Ultimately, nine federal agencies and at least 100 companies were infiltrated via SolarWinds and other methods.