Reverse Engineering Asked by Dar on January 17, 2021
I’m trying to make a website that displays the feedback from the Windows 10 Feedback Hub but i have met a roadblock. I’m using Fiddler 4 (Fiddler Everywhere doesn’t have support for UWP yet and WireShark didn’t give me much data) to see the requests being sent to Microsoft’s servers.
I have tracked down that the request that receives the feedbacks is the following:
GET https://uif.microsoft.com/FeedbackCloudService.svc/feedbacks?&language=en-US&sortCategory=0&searchCategory=1&feedbacksFilter=0&issueFilter=0&statusFilter=0&buildFilter=0&userFilter=1&filterFormFactor=1&isRefresh=False&hasSticky=False&useCol=1 HTTP/1.1
But this request require a Bearer token (not JWT) which changes each day. The token is never being received from any of the previous requests sent what i can gather so I assume it’s being generated locally in the app. Example of what that token can look like:
Bearer t=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&p=
So now I wonder if there’s any way to crack open the Feedback Hub app and see how this token is being generated or where it’s getting it from. I know pretty much nothing about RE and especially not about UWP RE since it’s not dotnet so I can’t use dotPeek on it or similar.
Any help would be appreciated!
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