Techniques and strategies for reducing the attack surface of operating systems, servers, applications, and network devices. Covers configuration baselines, disabling unnecessary services, applying security patches, and implementing least-privilege principles to strengthen defenses.
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The Breach That Started With a Single Unpatched System In February 2024, UnitedHealth Group's subsidiary Change Healthcare suffered a ransomware attack that disrupted healthcare payment processing across the United States for weeks. The attackers gained access through a Citrix remote access portal that lacked multi-factor authentication. One system.
In February 2024, a misconfigured system at Change Healthcare led to one of the most devastating ransomware attacks in U.S. healthcare history. The ALPHV/BlackCat group exploited a Citrix remote access portal that lacked multi-factor authentication — a basic security for system control that should have been in place years
Colonial Pipeline shut down 5,500 miles of fuel infrastructure last month because of a single compromised password. One password. No multi-factor authentication. That's the state of security for system administrators in 2021 — and it's a wake-up call that keeps echoing across every industry. I'
The Breach That Started With a Single Unpatched Server In 2023, the MOVEit Transfer vulnerability (CVE-2023-34362) let the Cl0p ransomware gang compromise thousands of organizations worldwide — including federal agencies and major financial institutions. The root cause wasn't exotic malware or a sophisticated zero-day chain. It was a known
