Empty grocery store shelves and grounded planes tend to signal a crisis, whether it’s an extreme weather event, public health crisis, or geopolitical emergency. But these scenes of chaos in recent weeks in the United Kingdom, United States, and Canada were caused instead by financially motivated cyberattacks—seemingly perpetrated by a collective of joyriding teens.

A notorious cybercriminal group often called Scattered Spider is known for using social engineering techniques to infiltrate target companies by tricking IT help desk workers into granting them system access. Researchers say that the group seems to gain expertise about the backend systems commonly used by businesses in a particular industry and then uses this knowledge to hit a cluster of targets before moving on to another sector. The group often deploys ransomware or conducts data extortion attacks once it has compromised its victims.

Amid increasing pressure from law enforcement last year, which culminated in charges and arrests of five suspects allegedly linked to Scattered Spider, researchers say that the group was less active in 2024 and seemed to be attempting to lay low. The group’s escalating attacks in recent weeks, though, have shown that, far from being defeated, Scattered Spider is emboldened once again.

“There are some uniquely skilled actors in Scattered Spider when it comes to social engineering, and they have identified a major gap in our security systems that they’re successfully taking advantage of,” says John Hultquist, chief analyst in Google’s threat intelligence group. “This group is carrying out serious attacks on our critical infrastructure, and I hope that we’re not missing the opportunity to address the most imminent threat.”

Though a number of incidents have not been publicly attributed, an overwhelming spree of recent attacks on UK grocery store chains, North Americ...