Attackers have interfered with refrigeration and freezer controls in supermarkets across several European countries, raising temperatures to as high as +50 °C in affected units.
The incidents impacted retail networks in Sweden, Belgium, Luxembourg, and Estonia. In the Estonian case, Kitman Coldtech representative Jann Mutso confirmed that intruders obtained access to a computer running an older-generation Danfoss refrigeration controller.
The attack was identified and halted within approximately ten minutes, allowing the company to avoid any product damage. Mutso emphasized that the threat actors are deliberately seeking out facilities still using legacy, unpatched controllers that have been exposed to the internet for remote service and monitoring.
Swedish supermarket chains ICA and Coop reported comparable problems. Earlier attacks of the same nature struck French supermarkets in October, resulting in spoiled goods.
