This article highlights the internal user agents utilized by native Windows 11 binaries via the WinHttpOpen API. When applications initiate a WinHTTP session, they specify a user agent string that identifies the client in subsequent web requests, making these strings vital for identifying legitimate system traffic.
The provided list covers a wide array of Windows services, including BITS, Delivery Optimization, and specialized authentication providers like Kerberos and Azure AD. For security analysts, these identifiers are essential for distinguishing between native OS behavior and potentially malicious network activity that might attempt to spoof common system agents.
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