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Russian Hackers That Hit Microsoft Also Infiltrated Hewlett Packard Enterprise

HPE says an infamous Russian state-sponsored hacking group breached its systems to access emails belonging to its cybersecurity and business departments.

 & Michael Kan Principal Reporter

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The Russian hackers who recently broke into Microsoft also managed to infiltrate another major IT company: Hewlett Packard Enterprise. 

HPE today reported that a notorious state-sponsored hacking group called Midnight Blizzard, or Cozy Bear, breached the company’s email systems. HPE first uncovered the attack on Dec. 12, but the culprits may have had access for months. 

"Based on our investigation, we now believe that the threat actor accessed and exfiltrated data beginning in May 2023 from a small percentage of HPE mailboxes belonging to individuals in our cybersecurity, go-to-market, business segments, and other functions,” the company said in a filing with the Securities and Exchange Commission.

It's unclear how the attackers gained access. But it looks like the Russian hackers targeted HPE on multiple fronts. In the filing, the company noted: “this incident is likely related to earlier activity by this threat actor, of which we were notified in June 2023, involving unauthorized access to and exfiltration of a limited number of SharePoint files as early as May 2023.” In response, HPE has been working with law enforcement and external cybersecurity experts to address the hack. 

The breach bears some similarities to how Cozy Bear targeted Microsoft. Last week, Redmond revealed that state-sponsored hackers breached Microsoft systems to access the corporate emails from senior leaders and employees in its “cybersecurity, legal, and other functions.”

In Microsoft’s case, the Russian hackers broke in by plugging in numerous passwords to hijack a "legacy non-production test tenant,” as a jumping-off point to access corporate email accounts. However, the company added: “The attack was not the result of a vulnerability in Microsoft products or services. To date, there is no evidence that the threat actor had any access to customer environments, production systems, source code, or AI systems. We will notify customers if any action is required.”  

The US alleges Cozy Bear, also known as APT29, operates with the backing of the Russian government. The group gained notoriety in 2016 for hacking the Democratic National Committee’s servers. In 2020, Cozy Bear was also implicated in the SolarWinds hack, which allowed Russian hackers to spy on several US government agencies.

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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