MpSigStub.exe
Sequence
System > smss.exe > smss.exe > wininit.exe > services.exe > svchost.exe > wuauclt.exe > updateplatform.exe > MpSigStub.exe
Purpose
Part of the Windows Automatic Update tool whose role is to extract downloaded Windows Updates
Image Path
C:\Windows\Temp\4756BEFE-AF47-438C-B789-26227AF49B43\MpSigStub.exe