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Security Firm FireEye Hacked by State-Sponsored Group

The company disclosed the attack to warn the IT security community that stolen FireEye tools could be used against them. Fortunately, none of the tools rely on zero-day exploits.

 & Michael Kan Principal Reporter

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Well, that’s embarrassing. A top cybersecurity firm, FireEye, says state-sponsored hackers managed to steal a copy of its investigative tools. 

On Tuesday, FireEye disclosed the theft in an effort to warn the IT security community that the hackers could end up using the same tools against them. The stolen technology pertains to so-called “Red Team” hacking tools, which can simulate a cyber attack. FireEye will use them to test a client’s cybersecurity defenses and then offer recommendations.

“We have been performing Red Team assessments for customers around the world for over 15 years. In that time, we have built up a set of scripts, tools, scanners, and techniques,” the company wrote in the blog post. 

So in the wrong hands, the same tools could be weaponized to infiltrate a company's network, search for vulnerabilities, and plant malware. Investigators probing the attack would also have trouble pinning down the culprit.

FireEye left unsaid when the hackers actually stole the tools or how the theft occurred. But according to The New York Times, the company strongly suspects a Russian intelligence agency was behind the theft. 

The good news is that many of the stolen tools had already been released to the security community. Nor did they contain any zero-day exploits—or ways to attack a piece of software using a previously unknown vulnerability.

“The tools apply well-known and documented methods that are used by other red teams around the world,” the company added. “Although we do not believe that this theft will greatly advance the attacker’s overall capabilities, FireEye is doing everything it can to prevent such a scenario.”

To help protect the security community, the company has released a list of countermeasures against the tools on GitHub. "It’s important to note that FireEye has not seen these tools disseminated or used by any adversaries, and we will continue to monitor for any such activity along with our security partners," it added.

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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