ESET Research has discovered new ransomware samples, which it has named HybridPetya, resembling the infamous Petya/NotPetya malware. They were uploaded to VirusTotal in February 2025. HybridPetya ...

Microsoft has recently begun replacing expiring Secure Boot certificates on eligible Windows 11 systems running 24H2 and 25H2 ...

Find the Secure Boot option and change it to Disabled. Save the changes and reboot again. We recommend keeping Secure Boot enabled unless you're sure it needs to be disabled. This article explains how ...

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How to check your Windows PC for expiring security certificates - a big one is ending soon ...

In this post, we will show you how to disable Secure Boot in Hyper-V and what to do if Hyper-V is not booting when Secure Boot is enabled. If you’re running a Generation 2 virtual machine in Hyper-V ...

Microsoft has begun rolling out updated Secure Boot certificates through monthly Windows updates to replace the original 2011 certificates that will expire in late June 2026. Microsoft has started ...

Why it matters: Discovered in October 2022, BlackLotus is a powerful UEFI-compatible bootkit sold on underground marketplaces at $5,000 per license. The malware provides impressive capabilities, and a ...

For a more detailed analysis and technical breakdown of HybridPetya, check out the latest ESET Research blogpost: "Introducing HybridPetya: Petya/NotPetya copycat with UEFI Secure Boot bypass," on ...