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Malware Hits Fujitsu, Possibly Stealing Customer Data

The malware was found on several company computers, the Japanese firm reports. Fujitsu provides IT services across the globe, including to governments.

 & Michael Kan Principal Reporter

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Hackers have managed to infiltrate the Japanese technology firm Fujitsu by secretly spreading malware to the company. 

“We confirmed the presence of malware on several of our company's work computers,” Fujitsu quietly posted in a statement last Friday. 

The company’s investigation also discovered that the malware led to the theft of “files containing personal information.” As a result, Fujitsu is warning that customer data may have been stolen. 

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

Fujitsu didn’t immediately respond to a request for comment, so it’s unclear if ransomware was involved in the attack. So far, it looks like Fujitsu has only reported the incident on the company’s Japanese website and to the country’s Personal Information Protection Commission. The company's statement refrains from mentioning if any US user data was ensnared.  

Still, the hack could be far reaching. The company is one of the largest IT service providers in the world, employing over 124,000 workers worldwide, and supporting customers in 180 countries. This includes providing IT services to governments, such as the Department of Defense.

If the incident did involve a ransomware gang, then it’s possible the attackers will threaten to leak the stolen information to pressure Fujitsu to pay up. But in the company’s statement, Fujitsu noted: “To date, we have not received any reports that personal information or information about our customers has been misused.”

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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