The FBI used a Microsoft device identifier, dubbed GDID, to link a teenager to a hack attributed to Scattered Spider, raising privacy red flags about Windows' surveillance capabilities.
Michael Kan
Michael Kan
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Edited By:
Chloe Albanesius
July 6, 2026
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(Photo by Drew Angerer/Getty Images)
The arrest of a teenage hacker has revealed that Microsoft can track a Windows PC and its online activity through a “Global Device ID" that seems to have no easy opt-out, sparking fears about potential surveillance.
Last week, the US announced it had extradited 19-year-old Peter Stokes from Europe for allegedly being a member of the notorious hacking group Scattered Spider. But the case stands out because Microsoft played a key role in linking Stokes to the suspected hacking crimes, according to an unsealed criminal complaint.
Peter Stokes
(Credit: DOJ)
Stokes allegedly hacked an unnamed luxury jewelry retailer in May 2025 while using a VPN. The 39-page criminal complaint shows the FBI used Microsoft records to discover that his IP address was associated with a Microsoft device identifier known as Global Device ID (GDID).
“According to a Microsoft representative, a Global Device Identifier in the Windows ecosystem is a persistent, device-level identifier designed to uniquely identify an installation of a Windows operating system on a device, either a physical device (e.g., a mobile phone or laptop) or virtual machine, across certain Microsoft services and scenarios," the complaint explains.
The global device ID isn’t exactly surprising, given that it's standard practice to assign a unique ID to each account or device so a tech provider can recognize and distinguish between them. But the complaint reveals Microsoft can associate the GDID with third-party services and the timing as well, giving Redmond a way to theoretically track a user’s online activity. In other words, Redmond might be able to track the online activity of your Windows PC without third-party browser cookies.
the complaint
(Credit: DOJ)
Stokes was discovered exploiting a web development tool called ngrok to bypass the jewelry retailer's network defenses. The complaint says Microsoft had records showing that on May 12, 2025, at 19:21 UTC, the GDID associated with Stokes’ computer “accessed, among other ngrok pages, 'https://dashboard[.]ngrok.com/signup,' the ngrok page to set up an ngrok account.”
The document adds that Microsoft records also showed the GDID accessing “multiple sites” from servers at Tzulo, a web hosting provider, to help pull off the hack.
diagram of identifiers
The GDID for Stokes' PC was allegedly 6755467234350028. (Credit: DOJ)
Hence, the fact that federal investigators used the Microsoft identifier to nab a suspected hacker is raising concerns that it could be abused for other surveillance purposes. “Microsoft Windows is surveillance software,” cybersecurity expert Matthew Hickey alleged in a tweet.
The device ID is mentioned briefly on this support page, but Microsoft hasn't otherwise commented on it publicly. According to the criminal complaint, a Windows user can reset the GDID on their own, although it's not easy. “A GDID remains consistent across Windows operating system updates on a device, but a reinstall of Windows, either on the same device or on a different device, will be tied to a new unique GDID,” the court document says. In a footnote, it adds, “Thus, one Microsoft user could have multiple GDIDs.”
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Still, we suspect it wouldn’t be hard for Microsoft to tie a newly set GDID to the old one, since the company could look at other identifiers, such as a Microsoft account login or an IP address, and match them. In response to the surveillance potential, some users have already been exploring ways to contain and scrub the GDID identifier.
Meanwhile, cybersecurity researcher Costin Raiu is questioning whether other tech companies have the same surveillance capabilities, given the use of unique identifiers.
"I would also ask: how much of this is happening on Apple devices? Is it on the same scale? Is it happening at an even higher level — do they tie it to the hardware, so that even if you reinstall, it doesn’t matter, because it’s hardware-based?" he said in the Three Buddy Problem podcast. "Very likely it’s not unique to Microsoft. And probably, if you want to be fully anonymous, you may at some point have to use Linux, FreeBSD, whatever, for your development environments, and tunnel everything through proxies, Tor, VPNs, and such."
https://www.pcmag.com/news/a-hackers-arrest-reveals-microsoft-can-track-users-via-a-windows-device
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A Hacker's Arrest Reveals Microsoft Can Track Users Via a Windows Device ID
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