Monitoring with PowerShell: Monitoring Onedrive Known Folder Move

So my clients are moving to a cloud only based model more and more each day. In most cases this means storing their data in Team/Onedrive. We use the option for Known Folder move. (KFM). The known folders are the Desktop, Pictures, and Documents folder. to setup KFM we use the guide by Microsoft. Quite simply we execute the following PowerShell commands via our RMM system.

$tenantID = "529ceae5-f210-42e8-9645-1234567" #TenantID GUID.
new-item -Path "HKLM:\SOFTWARE\Policies\Microsoft\OneDrive" -Force
New-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\OneDrive" -Name "KFMSilentOptIn" -Value $tenantID -Force
New-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\OneDrive" -Name "KFMSilentOptInWithNotification" -Value "1" -Force

For some reason or another the data does not always move and get protected. To make sure that we can see what’s going on I’ve decided to create the following monitoring set. This monitors if the KFM is enabled, and if it is enabled that the folders actually have been redirected.

$KFMSet = get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\OneDrive" -Name "KFMSilentOptIn"
if (!$KFMSet) {
    $KFMHealth = "KFM has not been set via registry" 
}
else {
$Desktop = (Get-ItemProperty -path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" -name "Desktop").Desktop
$Pictures = (Get-ItemProperty -path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" -name "My Pictures").'My pictures'
$Documents = (Get-ItemProperty -path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" -name "Personal").Personal

if($Desktop -notlike "$($ENV:OneDrive)*") { $KFMHealth = "Desktop is not set to Onedrive location." }
if($Pictures -notlike "$($ENV:OneDrive)*") { $KFMHealth = "Pictures is not set to Onedrive location." }
if($Documents -notlike "$($ENV:OneDrive)*") { $KFMHealth = "My Documents is not set to Onedrive location." }
}
if($KFMHealth -eq $null) { $KFMHealth = "Healthy" }

Now I can hear you thinking “But Kelvin, this script runs in my RMM and that does not have access to the current user” Well, for these cases where you suffer from this use the following script that impersonates the user for you.

$Source = @"
using System;  
using System.Runtime.InteropServices;

namespace murrayju.ProcessExtensions  
{
    public static class ProcessExtensions
    {
        #region Win32 Constants

        private const int CREATE_UNICODE_ENVIRONMENT = 0x00000400;
        private const int CREATE_NO_WINDOW = 0x08000000;

        private const int CREATE_NEW_CONSOLE = 0x00000010;

        private const uint INVALID_SESSION_ID = 0xFFFFFFFF;
        private static readonly IntPtr WTS_CURRENT_SERVER_HANDLE = IntPtr.Zero;

        #endregion

        #region DllImports

        [DllImport("advapi32.dll", EntryPoint = "CreateProcessAsUser", SetLastError = true, CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool CreateProcessAsUser(
            IntPtr hToken,
            String lpApplicationName,
            String lpCommandLine,
            IntPtr lpProcessAttributes,
            IntPtr lpThreadAttributes,
            bool bInheritHandle,
            uint dwCreationFlags,
            IntPtr lpEnvironment,
            String lpCurrentDirectory,
            ref STARTUPINFO lpStartupInfo,
            out PROCESS_INFORMATION lpProcessInformation);

        [DllImport("advapi32.dll", EntryPoint = "DuplicateTokenEx")]
        private static extern bool DuplicateTokenEx(
            IntPtr ExistingTokenHandle,
            uint dwDesiredAccess,
            IntPtr lpThreadAttributes,
            int TokenType,
            int ImpersonationLevel,
            ref IntPtr DuplicateTokenHandle);

        [DllImport("userenv.dll", SetLastError = true)]
        private static extern bool CreateEnvironmentBlock(ref IntPtr lpEnvironment, IntPtr hToken, bool bInherit);

        [DllImport("userenv.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool DestroyEnvironmentBlock(IntPtr lpEnvironment);

        [DllImport("kernel32.dll", SetLastError = true)]
        private static extern bool CloseHandle(IntPtr hSnapshot);

        [DllImport("kernel32.dll")]
        private static extern uint WTSGetActiveConsoleSessionId();

        [DllImport("Wtsapi32.dll")]
        private static extern uint WTSQueryUserToken(uint SessionId, ref IntPtr phToken);

        [DllImport("wtsapi32.dll", SetLastError = true)]
        private static extern int WTSEnumerateSessions(
            IntPtr hServer,
            int Reserved,
            int Version,
            ref IntPtr ppSessionInfo,
            ref int pCount);

        #endregion

        #region Win32 Structs

        private enum SW
        {
            SW_HIDE = 0,
            SW_SHOWNORMAL = 1,
            SW_NORMAL = 1,
            SW_SHOWMINIMIZED = 2,
            SW_SHOWMAXIMIZED = 3,
            SW_MAXIMIZE = 3,
            SW_SHOWNOACTIVATE = 4,
            SW_SHOW = 5,
            SW_MINIMIZE = 6,
            SW_SHOWMINNOACTIVE = 7,
            SW_SHOWNA = 8,
            SW_RESTORE = 9,
            SW_SHOWDEFAULT = 10,
            SW_MAX = 10
        }

        private enum WTS_CONNECTSTATE_CLASS
        {
            WTSActive,
            WTSConnected,
            WTSConnectQuery,
            WTSShadow,
            WTSDisconnected,
            WTSIdle,
            WTSListen,
            WTSReset,
            WTSDown,
            WTSInit
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct PROCESS_INFORMATION
        {
            public IntPtr hProcess;
            public IntPtr hThread;
            public uint dwProcessId;
            public uint dwThreadId;
        }

        private enum SECURITY_IMPERSONATION_LEVEL
        {
            SecurityAnonymous = 0,
            SecurityIdentification = 1,
            SecurityImpersonation = 2,
            SecurityDelegation = 3,
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct STARTUPINFO
        {
            public int cb;
            public String lpReserved;
            public String lpDesktop;
            public String lpTitle;
            public uint dwX;
            public uint dwY;
            public uint dwXSize;
            public uint dwYSize;
            public uint dwXCountChars;
            public uint dwYCountChars;
            public uint dwFillAttribute;
            public uint dwFlags;
            public short wShowWindow;
            public short cbReserved2;
            public IntPtr lpReserved2;
            public IntPtr hStdInput;
            public IntPtr hStdOutput;
            public IntPtr hStdError;
        }

        private enum TOKEN_TYPE
        {
            TokenPrimary = 1,
            TokenImpersonation = 2
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct WTS_SESSION_INFO
        {
            public readonly UInt32 SessionID;

            [MarshalAs(UnmanagedType.LPStr)]
            public readonly String pWinStationName;

            public readonly WTS_CONNECTSTATE_CLASS State;
        }

        #endregion

        // Gets the user token from the currently active session
        private static bool GetSessionUserToken(ref IntPtr phUserToken)
        {
            var bResult = false;
            var hImpersonationToken = IntPtr.Zero;
            var activeSessionId = INVALID_SESSION_ID;
            var pSessionInfo = IntPtr.Zero;
            var sessionCount = 0;

            // Get a handle to the user access token for the current active session.
            if (WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, ref pSessionInfo, ref sessionCount) != 0)
            {
                var arrayElementSize = Marshal.SizeOf(typeof(WTS_SESSION_INFO));
                var current = pSessionInfo;

                for (var i = 0; i < sessionCount; i++)
                {
                    var si = (WTS_SESSION_INFO)Marshal.PtrToStructure((IntPtr)current, typeof(WTS_SESSION_INFO));
                    current += arrayElementSize;

                    if (si.State == WTS_CONNECTSTATE_CLASS.WTSActive)
                    {
                        activeSessionId = si.SessionID;
                    }
                }
            }

            // If enumerating did not work, fall back to the old method
            if (activeSessionId == INVALID_SESSION_ID)
            {
                activeSessionId = WTSGetActiveConsoleSessionId();
            }

            if (WTSQueryUserToken(activeSessionId, ref hImpersonationToken) != 0)
            {
                // Convert the impersonation token to a primary token
                bResult = DuplicateTokenEx(hImpersonationToken, 0, IntPtr.Zero,
                    (int)SECURITY_IMPERSONATION_LEVEL.SecurityImpersonation, (int)TOKEN_TYPE.TokenPrimary,
                    ref phUserToken);

                CloseHandle(hImpersonationToken);
            }

            return bResult;
        }

        public static bool StartProcessAsCurrentUser(string appPath, string cmdLine = null, string workDir = null, bool visible = true)
        {
            var hUserToken = IntPtr.Zero;
            var startInfo = new STARTUPINFO();
            var procInfo = new PROCESS_INFORMATION();
            var pEnv = IntPtr.Zero;
            int iResultOfCreateProcessAsUser;

            startInfo.cb = Marshal.SizeOf(typeof(STARTUPINFO));

            try
            {
                if (!GetSessionUserToken(ref hUserToken))
                {
                    throw new Exception("StartProcessAsCurrentUser: GetSessionUserToken failed.");
                }

                uint dwCreationFlags = CREATE_UNICODE_ENVIRONMENT | (uint)(visible ? CREATE_NEW_CONSOLE : CREATE_NO_WINDOW);
                startInfo.wShowWindow = (short)(visible ? SW.SW_SHOW : SW.SW_HIDE);
                startInfo.lpDesktop = "winsta0\\default";

                if (!CreateEnvironmentBlock(ref pEnv, hUserToken, false))
                {
                    throw new Exception("StartProcessAsCurrentUser: CreateEnvironmentBlock failed.");
                }

                if (!CreateProcessAsUser(hUserToken,
                    appPath, // Application Name
                    cmdLine, // Command Line
                    IntPtr.Zero,
                    IntPtr.Zero,
                    false,
                    dwCreationFlags,
                    pEnv,
                    workDir, // Working directory
                    ref startInfo,
                    out procInfo))
                {
                    throw new Exception("StartProcessAsCurrentUser: CreateProcessAsUser failed.\n");
                }

                iResultOfCreateProcessAsUser = Marshal.GetLastWin32Error();
            }
            finally
            {
                CloseHandle(hUserToken);
                if (pEnv != IntPtr.Zero)
                {
                    DestroyEnvironmentBlock(pEnv);
                }
                CloseHandle(procInfo.hThread);
                CloseHandle(procInfo.hProcess);
            }
            return true;
        }
    }
}


"@

New-Item "C:\programdata\Microsoft OneDrive" -ItemType directory -Force -ErrorAction SilentlyContinue
Invoke-WebRequest -Uri 'https://raw.githubusercontent.com/rodneyviana/ODSyncService/master/Binaries/PowerShell/OneDriveLib.dll' -OutFile 'C:\programdata\Microsoft OneDrive\OneDriveLib.dll'

Add-Type -ReferencedAssemblies 'System', 'System.Runtime.InteropServices' -TypeDefinition $Source -Language CSharp 
$scriptblock = {
    $KFMSet = get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\OneDrive" -Name "KFMSilentOptIn"
    if (!$KFMSet) {
        $KFMHealth = "KFM has not been set via registry" 
    }
    else {
    $Desktop = (Get-ItemProperty -path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" -name "Desktop").Desktop
    $Pictures = (Get-ItemProperty -path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" -name "My Pictures").'My pictures'
    $Documents = (Get-ItemProperty -path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" -name "Personal").Personal
    
    if($Desktop -notlike "$($ENV:OneDrive)*") { $KFMHealth = "Desktop is not set to Onedrive location." }
    if($Pictures -notlike "$($ENV:OneDrive)*") { $KFMHealth = "Pictures is not set to Onedrive location." }
    if($Documents -notlike "$($ENV:OneDrive)*") { $KFMHealth = "My Documents is not set to Onedrive location." }
    }
    if($KFMHealth -eq $null) { $KFMHealth = "Healthy" }
    $KFMHealth | Out-File "C:\programdata\Microsoft OneDrive\OneDriveKFMLogging.txt" -Force
}

$bytes = [System.Text.Encoding]::Unicode.GetBytes($scriptblock)
$encodedCommand = [Convert]::ToBase64String($bytes)

[murrayju.ProcessExtensions.ProcessExtensions]::StartProcessAsCurrentUser("C:\Windows\System32\WindowsPowershell\v1.0\Powershell.exe", " -Encodedcommand $encodedCommand","C:\Windows\System32\WindowsPowershell\v1.0",$false)
start-sleep 2
$KFMHealth = get-content 'C:\programdata\Microsoft OneDrive\OneDriveKFMLogging.txt'
if($KFMHealth -eq $null) { $KFMHealth = "Script failed." }

And that’s it! an easy way to monitor if Known Folder move is working using your RMM system. As always, Happy PowerShelling.

Kelvin Tegelaar
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