Johnson Controls Confirms $27 Million Cost from September 2023 Ransomware Attack and Data Breach

In September 2023, Johnson Controls International experienced a ransomware attack that resulted in a $27 million expense, according to the company’s quarterly report filed with the U.S. Securities and Exchange Commission (SEC).

The multinational conglomerate, specializing in industrial control systems, security equipment, air conditioners, and fire safety equipment, confirmed that unauthorized access, data exfiltration, and ransomware deployment occurred, leading to a partial shutdown of its IT infrastructure.

The Dark Angels ransomware gang, utilizing encryptors from the Babuk and Ragnar Locker operations, claimed responsibility for the attack and demanded a $51 million ransom after allegedly stealing 27 TB of confidential data.

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Johnson Controls aims to assess the extent of data theft with the help of external cybersecurity experts. Despite the financial impact, the company assures that the unauthorized activity has been contained, and its digital products and services remain operational.


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