Where’s the Money: Defeating ATM Disk Encryption

Overview

Holding upwards of $400,000, ATMs continue to be a target of opportunity and have seen over a 600% increase in crime in just the last few years. During this time, I led security research with another colleague into the enterprise ATM industry resulting in the discovery of 6 zero-day vulnerabilities affecting Diebold Nixdorf’s Vynamic Security Suite (VSS), the most prolific ATM security solution in the market. 10 minutes or less is all that a malicious actor would need to gain full control of any system running VSS via offline code injection and decryption of the primary Windows OS. Diebold Nixdorf is one of three major North American enterprise class ATM manufacturers with a global presence in the financial, casino/gaming, and point-of-sale markets. Similar attack surfaces are currently being used in the wild and impact millions of systems across the globe. Furthermore, VSS is known to be present throughout the US gaming industry, including most of the ATM/cash-out systems across Vegas