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Although it hasn't been seen in the wild yet A new ransomware strain dubbed HybridPetya was able to exploit a patched vulnerability to bypass Unified Extensible Firmware Interface (UEFI) Secure Boot on unrevoked Windows systems, making it the fourth publicly known bootkit capable of punching through the feature and hijacking a PC before the operating system loads.…

More from The Register 13 Sep 2025, 11:05 a.m. Bypass Exploit Firmware Microsoft Patch Ransomware Vulnerability

Threat actors affiliated with a ransomware strain known as Play are leveraging a never-before-seen exploit chain that bypasses blocking rules for ProxyNotShell flaws in Microsoft Exchange Server to achieve remote code execution (RCE) through Outlook Web Access (OWA)

More from The Hacker News 21 Dec 2022, 8:41 p.m. Bypass Crowdstrike Exchange Server Exploit Flaw Microsoft Mitigation Ransomware Remote Code Execution Research Threat Actor