Securing the Supply Chain: The JBS Hack and Food Security

In June 2021, JBS — the world's largest meat processing company — was hit by a ransomware attack attributed to the REvil group. The company paid $11 million in ransom after the attack disrupted operations at facilities across the United States, Australia, and Canada. For several days, meat supply chains were disrupted, affecting grocery stores and restaurants across multiple countries.

The JBS attack followed a familiar ransomware pattern: initial access (likely through compromised credentials or a phishing email), lateral movement across the network, and ultimately deployment of ransomware that encrypted critical operational systems. At every stage of this kill chain, DNS was involved — the initial phishing domain, the C2 communication channels, and the ransomware payload delivery infrastructure all relied on DNS resolution.

DNS-layer security provides defense-in-depth at each stage. Phishing domains that deliver initial access are blocked at DNS resolution — before the user sees the page. C2 domains used for lateral movement and data staging are blocked when compromised endpoints attempt to resolve them. Ransomware payload delivery domains are blocked before the executable downloads.

The Greywall adds a layer that traditional DNS security can't match. Ransomware operators use freshly registered infrastructure for each campaign. These domains have no history, no reputation, and no blocklist entry. They are, by definition, first-seen. The Greywall holds them automatically — disrupting the kill chain at a point where blocklists are blind.

For critical infrastructure organizations — food processing, energy, water, healthcare — DNS security is not optional. CISA's recommendation to implement protective DNS applies directly. The cost of a DNS security deployment is small relative to the cost of a ransomware incident (JBS paid $11M in ransom alone, with operational losses many times higher).