Cyberattacks on Manufacturers: The Verified Record

Attackers phished into an unnamed steelworks and reached its production networks; a blast furnace could not be shut down in a controlled manner, the BSI reported.

Ransomware spread across the aluminum maker's IT; plants were isolated, some ran with more manual work, and Hydro estimates the total cost at around NOK 800 million.

A system failure at supplier Kojima Industries, hit by ransomware, stopped all 28 lines at Toyota's 14 plants in Japan for one day; no record says a Toyota system was hacked.

Plants were disconnected in 2022 to contain ransomware, and some stopped again in 2025 after a "limited cyber incident"; nothing shows a shared cause.

An incident disrupted several IT systems; the company later called it not material and has never disclosed the vector, the actor or any effect on production.

Unauthorized access to IT systems led North America's largest steel producer to halt production at various locations "in an abundance of caution"; it called the incident not material.

Global systems were shut down and UK vehicle production stopped for about five weeks; how the attackers got in has never been officially stated.

An intrusion forced manual order processing and paused production; the quoted $356M is a sales decline, and the disclosed cost was $49M through December 2023.

Ransomware on business systems halted ordering and shipping at a chip-equipment supplier; the quoted $200M was expected lost revenue, the disclosed cost $15M net.

Data was exfiltrated and unnamed systems encrypted; West took its systems offline worldwide, and all sites restarted by 20 May.

An intrusion into the corporate network disrupted order processing, manufacturing and shipping; nothing on the record says a production machine was reached.

Ransomware reached part of a building technology company's internal IT and data was taken; it saw no evidence of impact to its digital products, based on information reviewed to date.