Rust Ransomware and the Quantum Threat

This high-risk daily intelligence brief from KeysGuard covers the fast-changing global cybersecurity threat scene, focusing on incidents from December 11 to 12, 2025. Key points include the rise of the Rust-based 01flip ransomware, capable of hitting both Windows and Linux systems, marking a move toward cross-platform extortion. Critical vulnerabilities in widely used software like WinRAR and GeoServer are being actively exploited, prompting CISA to shorten patch deadlines. Major third-party data breaches at companies like Coupang and Conduent have exposed tens of millions of records, highlighting systemic risks in marketing and vendor networks. The brief recommends prioritizing patches for exploited software and boosting detection for multi-platform malware and cloud API misuse, including Google Drive being leveraged for command and control.