Japanese tech corporation Fujitu warned its customers that personal information may have been obtained by hackers who deployed malware on multiple computers at the company’s offices.

The company — which is the sixth largest IT firm in the world based on annual revenue — released a statement on Friday confirming that they have been investigating the incident. 

“After confirming the presence of malware, we immediately disconnected the affected business computers and took other measures such as strengthening monitoring of other business computers,” the company said. “Additionally, we are currently continuing to investigate the circumstances surrounding the malware's intrusion and whether information has been leaked.”

The company did not respond to requests for comment about when the initial intrusion took place or what information was taken. The statement only says that they “discovered that files containing personal information and customer information could be illegally taken out.”

Those affected have been contacted individually through Japan’s Personal Information Protection Commission. 

The company reported more than $24 billion in revenue in 2022 and has more than 120,000 employees around the world. 

The company previously dealt with a cybersecurity issue in 2021, when its ProjectWEB enterprise software-as-a-service (SaaS) platform was taken offline following an incident where hackers used it to breach multiple Japanese government entities — including the Ministry of Land, Infrastructure, Transport, and Tourism; the Ministry of Foreign Affairs; the Cabinet Secretariat; and Narita Airport.