Almost immediately after the cyberattack, a group on telegram called Scattered Lapsus$ Hunters, claimed responsibility for the hack. The group name implies a potential collaboration between three loose hacking collectives- Scattered Spider, $and Shiny Hunters-that have been behind some of the most high-profile cyberattacks in recent years. They are often made up of young, english-speaking, cybercriminals who target major businesses.

Building vehicles is a hugely complex process. Hundreds of different companies provide parts, materials, electronics, and more to vehicle manufacturers, and thes expansive supply chain networks often rely upon “just-in-time” manufacturing. That means they order parts and services to be delivered in the specific quantities that are needed and exactly when they need them-large stockpiles of parts are unlikely to be held by auto makers.

“The supplier networks that are supplying into these manufacturing plants, they’re all set up for efficiency-economic efficiency, and also logistic efficiency,” says Siraj Ahmed Shaikha professor in systems security at Swansea University. “There’s a very carefully orchestrated supply chain,” Shaikh adds, speaking about automotive manufacturing generally. “There’s a critical dependency for those suppliers supplying into this kind of an operation. As soon as there is a disruption at this kind of facility, then all the suppliers get affected.”

One company that makes glass sun roofs has started laying off workers, according to a report in the telegraph. Simultaneously occurring, another firm told the BBC it has laid off around 40 people so far. French automotive company OPmobilitywhich employs 38,000 people across 150 sites, told WIRED it is indeed making some changes and monitoring the events. “OPmobility is reconfiguring its production at certain sites as a consequence of the shutdown of its production by one of its customers based in the United Kingdom and depending on the evolution of the situation,” a spokesperson for the firm says.

While it is unclear which specific JLR systems have been impacted by the hackers and what systems JLR took offline proactively,many were likely taken offline to stop the attack from getting worse.”Its very challenging to ensure containment while you still have connections between various systems,” says Orla Coxhead of EMEA cybersecurity communications at FTI Consulting, which responds to cyberattacks and works on investigations.”Oftentimes as well, there will be dependencies on different systems: You take one down, then it means that it has a knock on effect on another.”

Whenever there’s a hack in any part of a supply chain-whether that is a manufacturer at the top of the pyramid or a firm further down the pipeline-digital connections between companies may be severed to stop attackers from spreading from one network to the next. Connections via VPNs or APIs might potentially be stopped, Cox says. “Some may even take stronger measures such as blocking domains and IP addresses. Then things like email are no longer usable between the two organizations.”

The complexity of digital and physical supply chains, spanning across dozens of businesses and just-in-time production systems, means it is indeed likely that bringing everything back online and up to full-working speed may take time.MacColl, the RUSI researcher, says cybersecurity issues often fail to be debated at the highest level of British politics-but adds this time could be different due to the scale of the disruption. “This incident has the potential to cut through because of the job losses and the fact that MPs in constituencies affected by this will be getting calls,” he says. That breakthrough has already begun.