Macmillan, one of the largest book publishers in the United States, said it was hit by a cyberattack that forced it to shut down its computer systems.
Macmillan spokeswoman Erin Coffey told TechCrunch that the company recently experienced a “security incident” that “involved the encryption of certain files on our network.” The attack hit the company on June 25, according to reports, and also hit its UK subsidiary, known as Pan Macmillan.
Although the company declined to answer further questions about the nature of the incident or how its systems were compromised, the hackers’ use of encryption indicates it was ransomware. . The attack has not yet been claimed by major ransomware groups, and it remains unclear whether any sensitive data was stolen.
“As a precaution, we immediately took the systems offline to avoid any further impact to our network,” Coffey added. “We are working diligently with specialists to find the source of this issue, understand its impact on our systems, and restore full functionality to our networks as soon as possible.
“Customers and other third-party partners may notice that some systems are unavailable while these efforts are underway. Please be aware that the Macmillan team is working around the clock on this restoration and the installation of additional network protections.
Following the cyber incident, Macmillan also closed its virtual and physical offices in New York, with staff Tweeter therefore they had no access to their systems, emails and files. Publishers Weekly, which first reported the news of the cyberattack, notes that Macmillan’s sales team also warned disruptions could lead to delays in book deliveries.
Macmillan told TechCrunch it has already started bringing systems back online, but remains unable to process orders.
“We are bringing some systems back online, including those we took offline as a precaution,” Coffee said. “For the United States, we are accepting orders electronically, but we are unable to process them at this time. We will continue to communicate updates as they come.