CyberNews: 21/06/2026 Edition

Today’s roundup

Summary

A new ransomware operation, Prinz Eugen, has emerged, notable for prioritizing the encryption of recently modified files on compromised systems. This variant departs from typical ransomware behavior by intentionally leaving no ransom note, complicating recovery efforts and victim communication.

Microsoft has formally attributed a recent supply chain attack impacting Mastra AI to the North Korean state-sponsored hacking group Sapphire Sleet, also known as BlueNoroff. The sophisticated campaign successfully compromised more than 140 npm packages, indicating a significant and widespread threat to the software development supply chain.

A critical security deadline is approaching on June 24, affecting Windows and Linux systems. Cryptographic keys responsible for securing the boot sequence on these operating systems are set to begin expiring, potentially leading to boot failures or exposing systems to security vulnerabilities if necessary updates or key renewals are not implemented promptly.

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