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I've spent quite a bit of time trying to learn as much as possible about the Microsoft Aggregator Host process (AggregatorHost.exe). While searching online (and checking PCs in our labs), it appears it started showing up on Windows PCs in 2021.
I also found that MIcrosoft has a Windows App Development glossary where Microsoft writes "Aggregation is available as a convenience to avoid extra implementation overhead." Then, in English, we know that aggregation usually refers to the process of collecting and combining multiple pieces of data.
I then checked our PCs here at SpyShelter labs, and I found that they all had the AggregatorHost.exe actively running. Therefore, this seems to be a common and active part of the Windows OS.
If I was going to make a bet, I'd bet this executable collects different data from different parts of the Windows OS, then aggregates the data for different parts of Windows, like Windows Update, and Windows Security.
AggregatorHost.exe is a legitimate signed .exe that's made by Microsoft for the Windows OS, and is not malware.
Therefore, as long as you confirm this process is signed, you should be completely safe running AggregatorHost.exe. To check if the .exe is signed, use Windows Properties, or our free SpyShelter Antispyware app.
(Researched by Jon @ SpyShelter Labs)
We’ve found Microsoft Windows should be the publisher of AggregatorHost.exe.
How do we know? Our SpyShelter cybersecurity labs focuses on monitoring different types of Windows PC executables and their behaviors for our popular SpyShelter Antispyware software. Learn more about us, and how our cybersecurity team studies Windows PC executables/processes.
The publisher of an executable is the entity responsible for its distribution and authenticity. Most processes/executables on your PC should be signed. The signature on the executable should have been verified through a third party whose job it is to make sure the entity is who it says it is. Find an unsigned executable? You should consider scanning any completely unsigned .exe on your PC.
Below are 4 simple steps you can take to see if the AggregatorHost.exe process is safe or malware.
Our team at SpyShelter has been studying Windows PC executables for over 15 years, to help fight against spyware, malware, and other threats. SpyShelter has been featured in publications like The Register, PC Magazine, and many others. Now we’re working to share free, actionable, and easy to understand information about Windows executables (processes) with the world, to help as many people as possible keep their devices safe. Learn more about us on our "About SpyShelter” page.