Fileless UAC Bypass in Windows Store Binary

**Update** - 9/13/2019
Metasploit has added a module for the UAC Bypass in Windows! Most of Metasploit modules are built by community contributors for free (i. e. modules that are worth the effort to be included to make Metasploit users life easier). This UAC bypass was chosen due to the fact it a) does not require user interaction and b) it’s file-less (no dropping files on disk is needed). It’s common practice to give credit when its due when creating modules hence the reference to ACTIVELabs for the discovery. Find the module here.

**Update** - 5/23/2019
Please note Microsoft has released a behavioral detection for this attack vector in Windows Defender Antivirus with an alert level of “SEVERE."  We can confirm it works as expected. See the link here.
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Based on the increased interest in User Account Control (UAC) bypass research as of late, we've decided to read more on the subject and attempt to identify some sort of a pattern which ultimately led to finding our first UAC (still valid as of this writing) bypass. The following is a walkthrough of said finding. Please note we will not discuss UAC internals as there are plenty of well-written posts out there. In addition, will be using Windows 10 Version 1803 (OS Build 17134.590) as an example.

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