Code:
FakeLogonScreen
FakeLogonScreen is a utility to fake the Windows logon screen in order to obtain the user’s password. The password entered is validated against the Active Directory or local machine to make sure it is correct and is then displayed to the console or saved to disk.
It can either be executed by simply running the .exe file, or using for example Cobalt Strike’s execute-assembly command.
Binaries available from the Releases 3 page.
FakeLogonScreen.exe: Writes output to console which for example is compatible with Cobalt Strike
FakeLogonScreenToFile.exe: Writes output to console and %LOCALAPPDATA%\Microsoft\user.db
Folders:
/ (root): Built against .NET Framework 4.5 which is installed by default in Windows 8, 8.1 and 10
DOTNET35: Built against .NET Framework 3.5 which is installed by default in Windows 7
Features
Primary display shows a Windows 10 login screen while additional screens turn black
If custom background is configured by the user, shows that background instead of the default one
Validates entered password before closing the screen
Username and passwords entered are outputted to console or stored in a file
Blocks many shortkeys to prevent circumventing the screen
Minimizes all existing windows to avoid other windows staying on top
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