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

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 ...

With the increasing prevalence of open-source implementations and the expansion of personal computing device usage to include mobile and non-PC devices as well as traditional desktops and laptops, ...

Researchers on Wednesday announced a major cybersecurity find—the world’s first-known instance of real-world malware that can hijack a computer’s boot process even when Secure Boot and other advanced ...

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 ...

The functionality of the bootkit and its individual features make ESET Research believe that it is a threat known as BlackLotus, a UEFI bootkit that has been sold on hacking forums for USD$5,000 since ...

UEFI (Unified Extensible Firmware Interface) is the open, multi-vendor replacement for the aging BIOS standard, which first appeared in IBM computers in 1976. The UEFI standard is extensive, covering ...

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

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 ...

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 ...