Eduard Kovacs reports:
According to Danish broadcaster DR, all trains operated by DSB, the largest train operating company in the country, came to a standstill on Saturday morning and could not resume their journey for several hours.
While this may sound like the work of a sophisticated threat actor that targeted operational technology (OT) systems in an effort to cause disruption, it was actually the result of a security incident at Supeo, a Danish company that provides enterprise asset management solutions to railway companies, transportation infrastructure operators and public passenger authorities.
Read more at Security Week.