[REQ-DC-133] Configure User Rights: Shut down the system on Domain Controllers

Target Scope

  • Applicable Systems: Domain Controllers (Tier 0 Active Directory infrastructure).
  • Operating Systems: Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.

Implementation Details

  • Priority: High
  • GPO Path / Registry Location:
    • Policy Display Name: Shut down the system
    • Privilege Constant: SeShutdownPrivilege
    • GPO Path: Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\User Rights Assignment\Shut down the system
    • Registry Location: Stored inside local security database under privilege SeShutdownPrivilege set to *S-1-5-32-544 (Administrators).

Rationale

The SeShutdownPrivilege controls the capability of a user logged on locally at the console to cleanly shut down or restart the local operating system via the ExitWindowsEx or InitiateSystemShutdown APIs.

1. Technical Threat Vector & Abuse Mechanics

On mission-critical servers and Domain Controllers, allowing unauthorized users to trigger system shutdowns creates severe denial-of-service risks: (1) Service Interruption: Shutting down a Domain Controller halts Kerberos authentication, directory lookups, and LDAP services for all dependent clients; (2) Replication Disruption: Unexpected shutdowns can cause directory database (ntds.dit) corruption or replication delays across domain controllers; (3) Coerced Reboots: Attackers can trigger reboots to activate pending kernel payloads or force administrators to enter recovery keys.

2. Architectural Defense & Least Privilege Enforcement

Domain Controllers are the root of trust for the entire Active Directory forest, storing the directory database (ntds.dit), Kerberos master keys (krbtgt), and password hashes for all enterprise identities. Unrestricted allocation of user rights on Domain Controllers introduces devastating forest-compromise risks. Enforcing strict assignment of this privilege ensures that directory synchronization, authentication packages, and system execution remain strictly bounded to authorized directory components and Domain Administrators.

On Domain Controllers, SeShutdownPrivilege must be restricted strictly to Administrators (S-1-5-32-544). Standard domain users, operator accounts, and guest accounts must never be permitted to shut down Domain Controllers.

3. MITRE ATT&CK Mapping

  • T1529 - System Shutdown/Reboot
  • T1499 - Endpoint Denial of Service

Legacy Impact & Compatibility

  • Operational Impact: Restricting SeShutdownPrivilege to Administrators prevents accidental or malicious local shutdowns of Domain Controllers. Standard administrative maintenance procedures remain fully supported for Domain Administrators. Shutdown events are logged under System Event ID 1074.

Implementation Steps

Option A: Group Policy Object (GPO) Configuration (Preferred)

  1. Open the Group Policy Management Console (gpmc.msc).
  2. Navigate to the targeted GPO linked to Tier 0 Domain Controller systems (e.g., Default Domain Controllers Policy).
  3. In the console tree, browse to: Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\User Rights Assignment
  4. Open the policy Shut down the system.
  5. Select the Define these policy settings check box.
  6. Configure the security principal allocation to: *S-1-5-32-544 (Administrators).
  7. Click Apply and OK.
  8. Apply and verify policy enforcement across target hosts using gpupdate /force and inspect with secedit /export /cfg C:\Windows\Temp\sec_audit.cfg.

Option B: PowerShell & Registry Configuration (Remediation / Non-GPO)

Download Script: Configure-DcUraSeShutdownPrivilege.ps1

# Configure-DcUraSeShutdownPrivilege.ps1
# Configure-DcUraSeShutdownPrivilege.ps1
$SecTempDir = Join-Path $env:TEMP "SecurityTemplates"
if (-not (Test-Path $SecTempDir)) { New-Item -Path $SecTempDir -ItemType Directory -Force | Out-Null }
$CfgFile = Join-Path $SecTempDir "ura_seshutdownprivilege.cfg"
$DbFile = Join-Path $SecTempDir "secedit_seshutdownprivilege.sdb"
$LogFile = Join-Path $SecTempDir "secedit.log"

$Process = Start-Process secedit -ArgumentList "/export /cfg `"$CfgFile`"" -Wait -NoNewWindow -PassThru
if ($Process.ExitCode -ne 0) { Throw "Failed to export security template" }

$ConfigText = Get-Content -Path $CfgFile -Raw
if ($ConfigText -notmatch "\[Privilege Rights\]") {
    $ConfigText += "`r`n[Privilege Rights]`r`n"
}

$Lines = $ConfigText -split "`r?`n"
$NewLines = @()
$InPriv = $false
$KeyAdded = $false

foreach ($Line in $Lines) {
    if ($Line -match "^\[(.*)\]$") {
        if ($Matches[1] -eq "Privilege Rights") {
            $InPriv = $true
        } else {
            $InPriv = $false
        }
    }
    if ($InPriv -and $Line -match "^\s*SeShutdownPrivilege\s*=") {
        $NewLines += "SeShutdownPrivilege = *S-1-5-32-544"
        $KeyAdded = $true
    } else {
        $NewLines += $Line
    }
}

if (-not $KeyAdded) {
    # Find Privilege Rights section index and insert it right after
    $Idx = $NewLines.IndexOf("[Privilege Rights]")
    if ($Idx -ge 0) {
        $NewLines.Insert($Idx + 1, "SeShutdownPrivilege = *S-1-5-32-544")
    } else {
        $NewLines += "SeShutdownPrivilege = *S-1-5-32-544"
    }
}

$NewLines | Set-Content -Path $CfgFile -Force
$Proc = Start-Process secedit -ArgumentList "/configure /db `"$DbFile`" /cfg `"$CfgFile`" /areas USER_RIGHTS /log `"$LogFile`"" -Wait -NoNewWindow -PassThru
if ($Proc.ExitCode -ne 0) { Throw "Failed to configure secedit user rights" }
Remove-Item -Path $CfgFile, $DbFile -ErrorAction SilentlyContinue

To audit the hardening status: Download Script: Get-DcUraSeShutdownPrivilegeStatus.ps1

# Get-DcUraSeShutdownPrivilegeStatus.ps1
# Get-DcUraSeShutdownPrivilegeStatus.ps1
$SecTempDir = Join-Path $env:TEMP "SecurityTemplates"
if (-not (Test-Path $SecTempDir)) { New-Item -Path $SecTempDir -ItemType Directory -Force | Out-Null }
$CfgFile = Join-Path $SecTempDir "ura_audit_seshutdownprivilege.cfg"

$Process = Start-Process secedit -ArgumentList "/export /cfg `"$CfgFile`"" -Wait -NoNewWindow -PassThru
if ($Process.ExitCode -ne 0) {
    Write-Output "Non-Compliant"
    exit 1
}

$ConfigText = Get-Content -Path $CfgFile -Raw
Remove-Item -Path $CfgFile -ErrorAction SilentlyContinue

$Match = $ConfigText -match "(?mi)^\s*SeShutdownPrivilege\s*=\s*(.*)$"
$CurrentValue = ""
if ($Match) {
    $CurrentValue = $Matches[1].Trim()
}

$Expected = "*S-1-5-32-544"
if ($CurrentValue -eq $Expected) {
    Write-Output "Compliant"
    exit 0
} else {
    Write-Output "Non-Compliant"
    exit 1
}

Sources & Compliance References

  • ANSSI Active Directory Hardening Guide: ANSSI Active Directory Hardening Guide: R28 (User Rights Assignment)
  • CIS Benchmark: 2.2.36 (L1) Ensure 'Shut down the system' is set to 'Administrators'
  • Microsoft Security Baseline: User Rights Configuration specifications
  • Microsoft Learn: User Rights Assignment Reference

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