A joint recommendation from the Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the National Security Agency (NSA) warned that the BlackMatter ransomware group was targeting “multiple” organizations acting as critical infrastructure including two organizations in the U.S. food and agriculture sectors.

Authorities did not identify the victims, but Iowa New Cooperative, an Iowa-based farm service provider, was hit by a ransomware attack last month in which hackers demanded a $ 5.9 million ransom unlock their systems. The attack was followed by a similar attack on Crystal Valley, a Minnesota-based agriculture and grain marketing cooperative.

The advisory provides an overview of the BlackMatter threat, its tactics (which include wiping backup data stores and appliances instead of encrypting them), detection signatures, and best practices for defense. It also adds credibility …

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