Canvas has resumed normal operations after a targeted cyberattack on Thursday by hacking group ShinyHunters.

A message left by the group on Canvas threatened to leak user data unless parent company Instructure complied with their settlement request. 

A Los Rios alert sent hours following the outage said that the leak did not contain any confidential information like passwords or social security numbers. 

“We do not have any evidence that any confidential Los Rios student or employee information was a part of this breach,” the email said. “However we are taking every possible precaution given how quickly this situation has escalated.” 

Over 8,000 schools worldwide and half of college students in the United States use Canvas as a learning platform, according to the Instructure website.

A list released by ShinyHunters showed that other schools in the University of California and California State University systems were also affected.

While Canvas is back online, a Los Rios update said that the State Chancellor’s Office advised users to remain “cautious and vigilant.”

“Be wary of any new Canvas messages or emails soliciting money to access any element of Canvas or complete Canvas activities,” the email said. “They recommend avoiding accessing any links in messages from any user they are not familiar with.”

Users who notice any suspicious behavior or communications should report it at servicecentral.losrios.edu.