FlagThis — Daily Cybersecurity Intelligence Briefing

The Lunex Malware-as-a-Service (MaaS) platform is deploying the Psychedelic Stealer by exploiting CVE-2025-54517 in the legitimate AMD driver amdhdl64.sys. This campaign utilizes a Bring Your Own Vulnerable Driver (BYOVD) technique to achieve unsigned kernel-mode code execution, allowing attackers to disable EDR sensors within approximately two minutes of infection. Following defense neutralization, the stealer harvests browser credentials, session cookies, and autofill data from Chrome, Edge, and Firefox. Targeting Ukrainian-speaking users via fake CAPTCHA/ClickFix social engineering prompts, the campaign has impacted approximately 12,000 endpoints, resulting in significant credential theft and an estimated $3.2M in financial losses.