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DCOMPermissions.psm1
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DCOMPermissions.psm1
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<#
VERSION DATE AUTHOR
1.0.09 2017-09-15 Tony Pombo
- Initial Release
1.1.03 2017-09-22 Tony Pombo
- Replaced localized English names with SIDs
- Minor code cleanup
#> # Revision History
#Requires -Version 4.0
Set-StrictMode -Version 2.0
$ACL_REVISION = 2
$COM_RIGHTS_EXECUTE = 1
$COM_RIGHTS_EXECUTE_LOCAL = 2
$COM_RIGHTS_EXECUTE_REMOTE = 4
$COM_RIGHTS_ACTIVATE_LOCAL = 8
$COM_RIGHTS_ACTIVATE_REMOTE = 16
$Admins_SID = [System.Security.Principal.SecurityIdentifier]"S-1-5-32-544"
$System_SID = [System.Security.Principal.SecurityIdentifier]"S-1-5-18"
# The code for: Add-Type, Grant-TokenPrivilege, Revoke-TokenPrivilege
# is a subset of the "Grant, Revoke, Query user rights (privileges) using PowerShell" v1.3.1
# script available at https://gallery.technet.microsoft.com/Grant-Revoke-Query-user-26e259b0
Add-Type @'
using System;
namespace PS_LSA
{
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Security;
public enum Rights
{
SeTrustedCredManAccessPrivilege, // Access Credential Manager as a trusted caller
SeNetworkLogonRight, // Access this computer from the network
SeTcbPrivilege, // Act as part of the operating system
SeMachineAccountPrivilege, // Add workstations to domain
SeIncreaseQuotaPrivilege, // Adjust memory quotas for a process
SeInteractiveLogonRight, // Allow log on locally
SeRemoteInteractiveLogonRight, // Allow log on through Remote Desktop Services
SeBackupPrivilege, // Back up files and directories
SeChangeNotifyPrivilege, // Bypass traverse checking
SeSystemtimePrivilege, // Change the system time
SeTimeZonePrivilege, // Change the time zone
SeCreatePagefilePrivilege, // Create a pagefile
SeCreateTokenPrivilege, // Create a token object
SeCreateGlobalPrivilege, // Create global objects
SeCreatePermanentPrivilege, // Create permanent shared objects
SeCreateSymbolicLinkPrivilege, // Create symbolic links
SeDebugPrivilege, // Debug programs
SeDenyNetworkLogonRight, // Deny access this computer from the network
SeDenyBatchLogonRight, // Deny log on as a batch job
SeDenyServiceLogonRight, // Deny log on as a service
SeDenyInteractiveLogonRight, // Deny log on locally
SeDenyRemoteInteractiveLogonRight, // Deny log on through Remote Desktop Services
SeEnableDelegationPrivilege, // Enable computer and user accounts to be trusted for delegation
SeRemoteShutdownPrivilege, // Force shutdown from a remote system
SeAuditPrivilege, // Generate security audits
SeImpersonatePrivilege, // Impersonate a client after authentication
SeIncreaseWorkingSetPrivilege, // Increase a process working set
SeIncreaseBasePriorityPrivilege, // Increase scheduling priority
SeLoadDriverPrivilege, // Load and unload device drivers
SeLockMemoryPrivilege, // Lock pages in memory
SeBatchLogonRight, // Log on as a batch job
SeServiceLogonRight, // Log on as a service
SeSecurityPrivilege, // Manage auditing and security log
SeRelabelPrivilege, // Modify an object label
SeSystemEnvironmentPrivilege, // Modify firmware environment values
SeManageVolumePrivilege, // Perform volume maintenance tasks
SeProfileSingleProcessPrivilege, // Profile single process
SeSystemProfilePrivilege, // Profile system performance
SeUnsolicitedInputPrivilege, // "Read unsolicited input from a terminal device"
SeUndockPrivilege, // Remove computer from docking station
SeAssignPrimaryTokenPrivilege, // Replace a process level token
SeRestorePrivilege, // Restore files and directories
SeShutdownPrivilege, // Shut down the system
SeSyncAgentPrivilege, // Synchronize directory service data
SeTakeOwnershipPrivilege // Take ownership of files or other objects
}
public sealed class TokenManipulator
{
[StructLayout(LayoutKind.Sequential, Pack = 1)]
internal struct TokPriv1Luid
{
public int Count;
public long Luid;
public int Attr;
}
internal const int SE_PRIVILEGE_DISABLED = 0x00000000;
internal const int SE_PRIVILEGE_ENABLED = 0x00000002;
internal const int TOKEN_QUERY = 0x00000008;
internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
internal sealed class Win32Token
{
[DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
internal static extern bool AdjustTokenPrivileges(
IntPtr htok,
bool disall,
ref TokPriv1Luid newst,
int len,
IntPtr prev,
IntPtr relen
);
[DllImport("kernel32.dll", ExactSpelling = true)]
internal static extern IntPtr GetCurrentProcess();
[DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
internal static extern bool OpenProcessToken(
IntPtr h,
int acc,
ref IntPtr phtok
);
[DllImport("advapi32.dll", SetLastError = true)]
internal static extern bool LookupPrivilegeValue(
string host,
string name,
ref long pluid
);
[DllImport("kernel32.dll", ExactSpelling = true)]
internal static extern bool CloseHandle(
IntPtr phtok
);
}
public static void AddPrivilege(Rights privilege)
{
bool retVal;
int lasterror;
TokPriv1Luid tp;
IntPtr hproc = Win32Token.GetCurrentProcess();
IntPtr htok = IntPtr.Zero;
retVal = Win32Token.OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
tp.Count = 1;
tp.Luid = 0;
tp.Attr = SE_PRIVILEGE_ENABLED;
retVal = Win32Token.LookupPrivilegeValue(null, privilege.ToString(), ref tp.Luid);
retVal = Win32Token.AdjustTokenPrivileges(htok, false, ref tp, Marshal.SizeOf(tp), IntPtr.Zero, IntPtr.Zero);
Win32Token.CloseHandle(htok);
lasterror = Marshal.GetLastWin32Error();
if (lasterror != 0) throw new Win32Exception();
}
public static void RemovePrivilege(Rights privilege)
{
bool retVal;
int lasterror;
TokPriv1Luid tp;
IntPtr hproc = Win32Token.GetCurrentProcess();
IntPtr htok = IntPtr.Zero;
retVal = Win32Token.OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
tp.Count = 1;
tp.Luid = 0;
tp.Attr = SE_PRIVILEGE_DISABLED;
retVal = Win32Token.LookupPrivilegeValue(null, privilege.ToString(), ref tp.Luid);
retVal = Win32Token.AdjustTokenPrivileges(htok, false, ref tp, Marshal.SizeOf(tp), IntPtr.Zero, IntPtr.Zero);
Win32Token.CloseHandle(htok);
lasterror = Marshal.GetLastWin32Error();
if (lasterror != 0) throw new Win32Exception();
}
}
}
'@ # This type is used by Grant-TokenPriviledge, Revoke-TokenPrivilege
function Grant-TokenPrivilege {
<#
.SYNOPSIS
Enables privileges in the current process token.
.DESCRIPTION
Enables one or more privileges for the current process token. If a privilege cannot be enabled, an exception is thrown.
.PARAMETER Privilege
Name of the privilege to enable. More than one privilege may be listed.
Possible values:
SeTrustedCredManAccessPrivilege Access Credential Manager as a trusted caller
SeNetworkLogonRight Access this computer from the network
SeTcbPrivilege Act as part of the operating system
SeMachineAccountPrivilege Add workstations to domain
SeIncreaseQuotaPrivilege Adjust memory quotas for a process
SeInteractiveLogonRight Allow log on locally
SeRemoteInteractiveLogonRight Allow log on through Remote Desktop Services
SeBackupPrivilege Back up files and directories
SeChangeNotifyPrivilege Bypass traverse checking
SeSystemtimePrivilege Change the system time
SeTimeZonePrivilege Change the time zone
SeCreatePagefilePrivilege Create a pagefile
SeCreateTokenPrivilege Create a token object
SeCreateGlobalPrivilege Create global objects
SeCreatePermanentPrivilege Create permanent shared objects
SeCreateSymbolicLinkPrivilege Create symbolic links
SeDebugPrivilege Debug programs
SeDenyNetworkLogonRight Deny access this computer from the network
SeDenyBatchLogonRight Deny log on as a batch job
SeDenyServiceLogonRight Deny log on as a service
SeDenyInteractiveLogonRight Deny log on locally
SeDenyRemoteInteractiveLogonRight Deny log on through Remote Desktop Services
SeEnableDelegationPrivilege Enable computer and user accounts to be trusted for delegation
SeRemoteShutdownPrivilege Force shutdown from a remote system
SeAuditPrivilege Generate security audits
SeImpersonatePrivilege Impersonate a client after authentication
SeIncreaseWorkingSetPrivilege Increase a process working set
SeIncreaseBasePriorityPrivilege Increase scheduling priority
SeLoadDriverPrivilege Load and unload device drivers
SeLockMemoryPrivilege Lock pages in memory
SeBatchLogonRight Log on as a batch job
SeServiceLogonRight Log on as a service
SeSecurityPrivilege Manage auditing and security log
SeRelabelPrivilege Modify an object label
SeSystemEnvironmentPrivilege Modify firmware environment values
SeManageVolumePrivilege Perform volume maintenance tasks
SeProfileSingleProcessPrivilege Profile single process
SeSystemProfilePrivilege Profile system performance
SeUnsolicitedInputPrivilege "Read unsolicited input from a terminal device"
SeUndockPrivilege Remove computer from docking station
SeAssignPrimaryTokenPrivilege Replace a process level token
SeRestorePrivilege Restore files and directories
SeShutdownPrivilege Shut down the system
SeSyncAgentPrivilege Synchronize directory service data
SeTakeOwnershipPrivilege Take ownership of files or other objects
.EXAMPLE
Grant-TokenPrivilege SeIncreaseWorkingSetPrivilege
Enables the "Increase a process working set" privilege for the current process.
.INPUTS
PS_LSA.Rights Right
.OUTPUTS
None
.LINK
http://msdn.microsoft.com/en-us/library/aa375202.aspx
http://msdn.microsoft.com/en-us/library/bb530716.aspx
#>
[CmdletBinding()]
param (
[Parameter(Position=0, Mandatory=$true, ValueFromPipelineByPropertyName=$true, ValueFromPipeline=$true)]
[Alias('Right')] [PS_LSA.Rights[]] $Privilege
)
process {
foreach ($Priv in $Privilege) {
try { [PS_LSA.TokenManipulator]::AddPrivilege($Priv) }
catch [System.ComponentModel.Win32Exception] {
throw New-Object System.ComponentModel.Win32Exception("$($_.Exception.Message) ($Priv)", $_.Exception)
}
}
}
} # Enables privileges in the current process token
function Revoke-TokenPrivilege {
<#
.SYNOPSIS
Disables privileges in the current process token.
.DESCRIPTION
Disables one or more privileges for the current process token. If a privilege cannot be disabled, an exception is thrown.
.PARAMETER Privilege
Name of the privilege to disable. More than one privilege may be listed.
Possible values:
SeTrustedCredManAccessPrivilege Access Credential Manager as a trusted caller
SeNetworkLogonRight Access this computer from the network
SeTcbPrivilege Act as part of the operating system
SeMachineAccountPrivilege Add workstations to domain
SeIncreaseQuotaPrivilege Adjust memory quotas for a process
SeInteractiveLogonRight Allow log on locally
SeRemoteInteractiveLogonRight Allow log on through Remote Desktop Services
SeBackupPrivilege Back up files and directories
SeChangeNotifyPrivilege Bypass traverse checking
SeSystemtimePrivilege Change the system time
SeTimeZonePrivilege Change the time zone
SeCreatePagefilePrivilege Create a pagefile
SeCreateTokenPrivilege Create a token object
SeCreateGlobalPrivilege Create global objects
SeCreatePermanentPrivilege Create permanent shared objects
SeCreateSymbolicLinkPrivilege Create symbolic links
SeDebugPrivilege Debug programs
SeDenyNetworkLogonRight Deny access this computer from the network
SeDenyBatchLogonRight Deny log on as a batch job
SeDenyServiceLogonRight Deny log on as a service
SeDenyInteractiveLogonRight Deny log on locally
SeDenyRemoteInteractiveLogonRight Deny log on through Remote Desktop Services
SeEnableDelegationPrivilege Enable computer and user accounts to be trusted for delegation
SeRemoteShutdownPrivilege Force shutdown from a remote system
SeAuditPrivilege Generate security audits
SeImpersonatePrivilege Impersonate a client after authentication
SeIncreaseWorkingSetPrivilege Increase a process working set
SeIncreaseBasePriorityPrivilege Increase scheduling priority
SeLoadDriverPrivilege Load and unload device drivers
SeLockMemoryPrivilege Lock pages in memory
SeBatchLogonRight Log on as a batch job
SeServiceLogonRight Log on as a service
SeSecurityPrivilege Manage auditing and security log
SeRelabelPrivilege Modify an object label
SeSystemEnvironmentPrivilege Modify firmware environment values
SeManageVolumePrivilege Perform volume maintenance tasks
SeProfileSingleProcessPrivilege Profile single process
SeSystemProfilePrivilege Profile system performance
SeUnsolicitedInputPrivilege "Read unsolicited input from a terminal device"
SeUndockPrivilege Remove computer from docking station
SeAssignPrimaryTokenPrivilege Replace a process level token
SeRestorePrivilege Restore files and directories
SeShutdownPrivilege Shut down the system
SeSyncAgentPrivilege Synchronize directory service data
SeTakeOwnershipPrivilege Take ownership of files or other objects
.EXAMPLE
Revoke-TokenPrivilege SeIncreaseWorkingSetPrivilege
Disables the "Increase a process working set" privilege for the current process.
.INPUTS
PS_LSA.Rights Right
.OUTPUTS
None
.LINK
http://msdn.microsoft.com/en-us/library/aa375202.aspx
http://msdn.microsoft.com/en-us/library/bb530716.aspx
#>
[CmdletBinding()]
param (
[Parameter(Position=0, Mandatory=$true, ValueFromPipelineByPropertyName=$true, ValueFromPipeline=$true)]
[Alias('Right')] [PS_LSA.Rights[]] $Privilege
)
process {
foreach ($Priv in $Privilege) {
try { [PS_LSA.TokenManipulator]::RemovePrivilege($Priv) }
catch [System.ComponentModel.Win32Exception] {
throw New-Object System.ComponentModel.Win32Exception("$($_.Exception.Message) ($Priv)", $_.Exception)
}
}
}
} # Disables privileges in the current process token
function Get-DComPermission {
<#
.SYNOPSIS
Gets DCOM Permissions for a specified Application ID
.DESCRIPTION
Retrieves either the "Access Permissions" or "Launch and Activation Permissions" for a specified Application ID
.PARAMETER ApplicationID
The Application ID for the DCOM object
.PARAMETER Type
Indicates which type of permissions to retrieve
Valid options: Launch, Access
.EXAMPLE
Get-DCOMPermission -ApplicationID "{9CA88EE3-ACB7-47C8-AFC4-AB702511C276}" -Type Launch
.INPUTS
String ApplicationID
String Type
.OUTPUTS
String ApplicationID
String Type
String[] Access
Int AccessMask
System.Security.Principal.SecurityIdentifier SID
String Name
#>
param(
[Parameter(Position=0, Mandatory=$true, ValueFromPipelineByPropertyName=$true, ValueFromPipeline=$true)]
[Alias("APPID")] [string[]] $ApplicationID,
[Parameter(Position=1, Mandatory=$true, ValueFromPipelineByPropertyName=$true)]
[ValidateSet("Launch","Access")] [string] $Type
)
begin {
$ErrorActionPreference = "Stop"
New-PSDrive -PSProvider Registry -Root HKEY_CLASSES_ROOT -Name HKCR -Scope Local -ErrorAction SilentlyContinue | Out-Null
}
process {
foreach ($APPID in $ApplicationID) {
Write-Verbose "Getting registry value HKCR:\AppID\$APPID\$($Type)Permission"
$regkey = Get-Item -Path "HKCR:\AppID\$APPID"
try {
$reg_perms = ($regkey | Get-ItemProperty -Name "$($Type)Permission")."$($Type)Permission"
} catch {
if ($_.Exception.Message -match "Property $($Type)Permission does not exist") {
return "Default $Type permissions are inherited for $APPID"
} else {throw $_ }
}
$sd = New-Object System.Security.AccessControl.RawSecurityDescriptor($reg_perms, 0)
foreach ($ace in $sd.DiscretionaryAcl) {
Write-Verbose "Working on $($ace.SecurityIdentifier)"
try { $User = (($ace.SecurityIdentifier).Translate([System.Security.Principal.NTAccount])).Value }
catch { Write-Warning "Unable to map SID to name. $($ace.SecurityIdentifier)" ; $User=$null }
$access = @()
if ($Type -eq "Launch") {
if ( ($ace.AccessMask -band $COM_RIGHTS_EXECUTE_LOCAL) -or
(($ace.AccessMask -band $COM_RIGHTS_EXECUTE) -and
-not ($ace.AccessMask -band ($COM_RIGHTS_EXECUTE_REMOTE -bor
$COM_RIGHTS_ACTIVATE_REMOTE -bor
$COM_RIGHTS_ACTIVATE_LOCAL))) ) { $access += "LocalLaunch" }
if ( ($ace.AccessMask -band $COM_RIGHTS_EXECUTE_REMOTE) -or
(($ace.AccessMask -band $COM_RIGHTS_EXECUTE) -and
-not ($ace.AccessMask -band ($COM_RIGHTS_EXECUTE_LOCAL -bor
$COM_RIGHTS_ACTIVATE_REMOTE -bor
$COM_RIGHTS_ACTIVATE_LOCAL))) ) { $access += "RemoteLaunch" }
if ( ($ace.AccessMask -band $COM_RIGHTS_ACTIVATE_LOCAL) -or
(($ace.AccessMask -band $COM_RIGHTS_EXECUTE) -and
-not ($ace.AccessMask -band ($COM_RIGHTS_EXECUTE_LOCAL -bor
$COM_RIGHTS_EXECUTE_REMOTE -bor
$COM_RIGHTS_ACTIVATE_REMOTE))) ) { $access += "LocalActivation" }
if ( ($ace.AccessMask -band $COM_RIGHTS_ACTIVATE_REMOTE) -or
(($ace.AccessMask -band $COM_RIGHTS_EXECUTE) -and
-not ($ace.AccessMask -band ($COM_RIGHTS_EXECUTE_LOCAL -bor
$COM_RIGHTS_EXECUTE_REMOTE -bor
$COM_RIGHTS_ACTIVATE_LOCAL))) ) { $access += "RemoteActivation" }
} else {
if ( ($ace.AccessMask -band $COM_RIGHTS_EXECUTE_LOCAL) -or
(($ace.AccessMask -band $COM_RIGHTS_EXECUTE) -and
-not ($ace.AccessMask -band $COM_RIGHTS_EXECUTE_REMOTE)) ) { $access += "LocalAccess" }
if ( ($ace.AccessMask -band $COM_RIGHTS_EXECUTE_REMOTE) -or
(($ace.AccessMask -band $COM_RIGHTS_EXECUTE) -and
-not ($ace.AccessMask -band $COM_RIGHTS_EXECUTE_LOCAL)) ) { $access += "RemoteAccess" }
}
New-Object -TypeName PSObject -Property @{
"ApplicationID" = $APPID
"Type" = $ace.AceType ;
"Access" = $access ;
"AccessMask" = $ace.AccessMask ;
"SID" = $ace.SecurityIdentifier ;
"Name" = $User
}
}
}
}
}
function Grant-DComPermissionInternal {
param(
[string] $ApplicationID,
[string] $Type,
[System.Security.Principal.SecurityIdentifier] $SID,
[string[]] $Permissions,
[System.Security.AccessControl.AceType] $AceType,
[Switch] $PassThru
)
New-PSDrive -PSProvider Registry -Root HKEY_CLASSES_ROOT -Name HKCR -Scope Local -ErrorAction SilentlyContinue | Out-Null
Write-Verbose "Getting registry value responsible for COM security"
$regkey = Get-Item -Path "HKCR:\AppID\$ApplicationID"
try {
$reg_perms = ($regkey | Get-ItemProperty -Name "$($Type)Permission")."$($Type)Permission"
$sd = New-Object System.Security.AccessControl.RawSecurityDescriptor($reg_perms, 0)
} catch {
Write-Verbose "Replacing default permissions with new security descriptor"
$sd = New-Object System.Security.AccessControl.RawSecurityDescriptor(
([System.Security.AccessControl.ControlFlags]::DiscretionaryAclPresent -bor
[System.Security.AccessControl.ControlFlags]::SelfRelative),
$System_SID, $System_SID, $null,
$(New-Object System.Security.AccessControl.RawAcl($ACL_REVISION,1)) )
}
Write-Verbose "Determining new ACE properties"
$AccessMask = $COM_RIGHTS_EXECUTE
if ($Permissions -contains "ALL") {
if ($Type -eq "Launch") { $AccessMask = $AccessMask -bor $COM_RIGHTS_EXECUTE_LOCAL -bor $COM_RIGHTS_EXECUTE_REMOTE -bor $COM_RIGHTS_ACTIVATE_LOCAL -bor $COM_RIGHTS_ACTIVATE_REMOTE }
else { $AccessMask = $AccessMask -bor $COM_RIGHTS_EXECUTE_LOCAL -bor $COM_RIGHTS_EXECUTE_REMOTE }
} else {
if ($Permissions -contains "LocalLaunch") { $AccessMask = $AccessMask -bor $COM_RIGHTS_EXECUTE_LOCAL }
if ($Permissions -contains "RemoteLaunch") { $AccessMask = $AccessMask -bor $COM_RIGHTS_EXECUTE_REMOTE }
if ($Permissions -contains "LocalActivation") { $AccessMask = $AccessMask -bor $COM_RIGHTS_ACTIVATE_LOCAL }
if ($Permissions -contains "RemoteActivation") { $AccessMask = $AccessMask -bor $COM_RIGHTS_ACTIVATE_REMOTE }
if ($Permissions -contains "LocalAccess") { $AccessMask = $AccessMask -bor $COM_RIGHTS_EXECUTE_LOCAL }
if ($Permissions -contains "RemoteAccess") { $AccessMask = $AccessMask -bor $COM_RIGHTS_EXECUTE_REMOTE }
}
Write-Verbose "Searching for existing ACE for this user"
$acl = $sd.DiscretionaryAcl
$found = $false
foreach ($ace in $acl) {
if ($ace.SecurityIdentifier -eq $SID -and $ace.AceType -eq $AceType) {
$ace.AccessMask = $ace.AccessMask -bor $AccessMask
$found = $true
break
}
}
if (-not $found) {
Write-Verbose "Not found, creating new ACE entry"
$ace = New-Object System.Security.AccessControl.CommonAce(
[System.Security.AccessControl.AceFlags]::None,
[System.Security.AccessControl.AceQualifier]$AceType.value__,
$AccessMask, $SID, $false, $null)
if ($AceType -match "denied") { $acl.InsertAce(0, $ace) }
else { $acl.InsertAce($acl.Count, $ace) }
}
Write-Verbose "Convert to binary and save the ACL"
$sd.DiscretionaryAcl = $acl
$sdbytes = New-Object 'byte[]' $sd.BinaryLength
$sd.GetBinaryForm($sdbytes, 0)
$regkey | New-ItemProperty -Name "$($Type)Permission" -PropertyType Binary -Value $sdBytes -Force | Out-Null
if ($PassThru) { New-Object -TypeName PSObject -Property @{ "ApplicationID" = $ApplicationID ; "Type" = $Type } }
}
function Revoke-DComPermissionInternal {
param(
[string] $ApplicationID,
[string] $Type,
[System.Security.Principal.SecurityIdentifier] $SID,
[string[]] $Permissions,
[System.Security.AccessControl.AceType] $AceType,
[Switch] $PassThru
)
New-PSDrive -PSProvider Registry -Root HKEY_CLASSES_ROOT -Name HKCR -Scope Local -ErrorAction SilentlyContinue | Out-Null
Write-Verbose "Getting registry value responsible for COM security"
$regkey = Get-Item -Path "HKCR:\AppID\$ApplicationID"
try {
$reg_perms = ($regkey | Get-ItemProperty -Name "$($Type)Permission")."$($Type)Permission"
$sd = New-Object System.Security.AccessControl.RawSecurityDescriptor($reg_perms, 0)
} catch { Write-Warning "Using default permissions (no changes made)" ; return }
Write-Verbose "Searching for existing ACE for this user"
$acl = $sd.DiscretionaryAcl
$found = $false
for ($index=0 ; $index -lt $acl.Count; $index++) {
$ace = $acl[$index]
if ($ace.SecurityIdentifier -eq $SID -and $ace.AceType -eq $AceType) {
Write-Verbose "Found ACE for this user"
if ($Permissions -contains "LocalLaunch" -and $ace.AccessMask -band $COM_RIGHTS_EXECUTE_LOCAL)
{ $ace.AccessMask = $ace.AccessMask -bxor $COM_RIGHTS_EXECUTE_LOCAL }
if ($Permissions -contains "RemoteLaunch" -and $ace.AccessMask -band $COM_RIGHTS_EXECUTE_REMOTE)
{ $ace.AccessMask = $ace.AccessMask -bxor $COM_RIGHTS_EXECUTE_REMOTE }
if ($Permissions -contains "LocalActivation" -and $ace.AccessMask -band $COM_RIGHTS_ACTIVATE_LOCAL)
{ $ace.AccessMask = $ace.AccessMask -bxor $COM_RIGHTS_ACTIVATE_LOCAL }
if ($Permissions -contains "RemoteActivation" -and $ace.AccessMask -band $COM_RIGHTS_ACTIVATE_REMOTE)
{ $ace.AccessMask = $ace.AccessMask -bxor $COM_RIGHTS_ACTIVATE_REMOTE }
if ($Permissions -contains "LocalAccess" -and $ace.AccessMask -band $COM_RIGHTS_EXECUTE_LOCAL)
{ $ace.AccessMask = $ace.AccessMask -bxor $COM_RIGHTS_EXECUTE_LOCAL }
if ($Permissions -contains "RemoteAccess" -and $ace.AccessMask -band $COM_RIGHTS_EXECUTE_REMOTE)
{ $ace.AccessMask = $ace.AccessMask -bxor $COM_RIGHTS_EXECUTE_REMOTE }
if ($Permissions -contains "ALL" -or $ace.AccessMask -eq 0 -or $ace.AccessMask -eq $COM_RIGHTS_EXECUTE)
{ $acl.RemoveAce($index) }
$found = $true
break
}
}
if (-not $found) { Write-Verbose "ACE not found, no changes made" }
else {
Write-Verbose "Convert to binary and save the ACL"
$sd.DiscretionaryAcl = $acl
$sdbytes = New-Object 'byte[]' $sd.BinaryLength
$sd.GetBinaryForm($sdbytes, 0)
$regkey | New-ItemProperty -Name "$($Type)Permission" -PropertyType Binary -Value $sdBytes -Force | Out-Null
}
if ($PassThru) { New-Object -TypeName PSObject -Property @{ "ApplicationID" = $ApplicationID ; "Type" = $Type } }
}
function Wrapper-DComPermission {
param(
[Parameter(Mandatory=$true)] [ValidateSet("Grant","Revoke")] [string] $Purpose,
[string] $ApplicationID,
[string] $Type,
[string] $Account,
[string[]] $Permissions,
[Switch] $Deny,
[Switch] $PassThru,
[Switch] $OverrideConfigurationPermissions
)
if ($Type -eq "Launch") {
if ($Permissions -contains "LocalAccess") { throw New-Object System.ArgumentException("LocalAccess is not a valid Launch permission") }
if ($Permissions -contains "RemoteAccess") { throw New-Object System.ArgumentException("RemoteAccess is not a valid Launch permission") }
} else {
if ($Permissions -contains "LocalLaunch") { throw New-Object System.ArgumentException("LocalLaunch is not a valid Access permission") }
if ($Permissions -contains "RemoteLaunch") { throw New-Object System.ArgumentException("RemoteLaunch is not a valid Access permission") }
if ($Permissions -contains "LocalActivation") { throw New-Object System.ArgumentException("LocalActivation is not a valid Access permission") }
if ($Permissions -contains "RemoteActivation") { throw New-Object System.ArgumentException("RemoteActivation is not a valid Access permission") }
}
$AceType = [System.Security.AccessControl.AceType]::AccessAllowed
if ($Deny) { $AceType = [System.Security.AccessControl.AceType]::AccessDenied }
Write-Verbose "Getting SID from account name"
$UserNTAccount = New-Object System.Security.Principal.NTAccount($Account)
[System.Security.Principal.SecurityIdentifier] $SID = ($UserNTAccount.Translate([System.Security.Principal.SecurityIdentifier])).Value
try {
if ($Purpose -eq "Grant") { Grant-DComPermissionInternal -ApplicationID $ApplicationID -SID $SID -Type $Type -Permissions $Permissions -AceType $AceType -PassThru:$PassThru }
else { Revoke-DComPermissionInternal -ApplicationID $ApplicationID -SID $SID -Type $Type -Permissions $Permissions -AceType $AceType -PassThru:$PassThru }
} catch [System.Security.SecurityException] {
Write-Verbose "Access denied setting DCOM permissions (registry configuration permissions are lacking...)"
if (-not $OverrideConfigurationPermissions) { Write-Verbose "...Override not specified, aborting" ; throw $_ }
else { Write-Verbose "...Attempting to override" }
if (-not [bool](([System.Security.Principal.WindowsIdentity]::GetCurrent()).groups -match "S-1-5-32-544"))
{ Write-Warning "No administrator rights (not elevated)" ; throw $_ }
$OldOwner = $null
$RevokePrivilege = $false
# User has admin rights, but Admininstrators do not have rights to change values. Need to change permissions
Write-Verbose "Opening registry key to change its permissions"
try {
$key = [Microsoft.Win32.Registry]::ClassesRoot.OpenSubKey("AppID\$ApplicationID", 'ReadWriteSubTree', 'ChangePermissions')
} catch [System.Security.SecurityException] {
Write-Verbose "Access denied opening registry key to change permissions (not owner)`n`tReopening registry key to take ownership"
try {
$key = [Microsoft.Win32.Registry]::ClassesRoot.OpenSubKey("AppID\$ApplicationID", 'ReadWriteSubTree', 'TakeOwnership')
} catch [System.Security.SecurityException] {
Write-Verbose "Access denied opening registry key to take ownership, enabling Token Privileges and trying again"
Grant-TokenPrivilege -Privilege SeTakeOwnershipPrivilege,SeRestorePrivilege
$RevokePrivilege = $true
$key = [Microsoft.Win32.Registry]::ClassesRoot.OpenSubKey("AppID\$ApplicationID", 'ReadWriteSubTree', 'TakeOwnership')
}
Write-Verbose "Setting owner to Administrators"
try {
$acl = $key.GetAccessControl()
$OldOwner = [System.Security.Principal.NTAccount]$acl.Owner
$acl.SetOwner($Admins_SID)
$key.SetAccessControl($acl)
} catch {
if ($RevokePrivilege) { try { Revoke-TokenPrivilege -Privilege SeTakeOwnershipPrivilege,SeRestorePrivilege } catch {} }
throw $_
} finally {
$key.Close()
}
Write-Verbose "Retry: opening registry key to change its permissions"
try {
$key = [Microsoft.Win32.Registry]::ClassesRoot.OpenSubKey("AppID\$ApplicationID", 'ReadWriteSubTree', 'ChangePermissions')
} catch {
Write-Verbose "Failed again (you should never see this). Restoring original owner"
$key = [Microsoft.Win32.Registry]::ClassesRoot.OpenSubKey("AppID\$ApplicationID", 'ReadWriteSubTree', 'TakeOwnership')
$acl = $key.GetAccessControl()
$acl.SetOwner($OldOwner)
$key.SetAccessControl($acl)
$key.Close()
if ($RevokePrivilege) { try { Revoke-TokenPrivilege -Privilege SeTakeOwnershipPrivilege,SeRestorePrivilege } catch {} }
throw $_
}
}
Write-Verbose "Setting ACL to grant Administrators full control"
$acl = $key.GetAccessControl()
$acl_original = $key.GetAccessControl()
$acl_original.SetAccessRuleProtection($acl_original.AreAccessRulesProtected, $true) # Must "change" ACL, or .NET won't save it
$rule = New-Object System.Security.AccessControl.RegistryAccessRule($Admins_SID, "FullControl", "ContainerInherit", "None", "Allow")
$acl.ResetAccessRule($rule) # Replace all ACEs for Administrators with one that grants full control
$key.SetAccessControl($acl)
try {
if ($Purpose -eq "Grant") { Grant-DComPermissionInternal -ApplicationID $ApplicationID -SID $SID -Type $Type -Permissions $Permissions -AceType $AceType -PassThru:$PassThru }
else { Revoke-DComPermissionInternal -ApplicationID $ApplicationID -SID $SID -Type $Type -Permissions $Permissions -AceType $AceType -PassThru:$PassThru }
} catch {
throw $_
} finally {
# Set ACL back to original value
Write-Verbose "Restoring original registry key permissions & owner"
if ($OldOwner) { $acl_original.SetOwner($OldOwner) }
$key.SetAccessControl($acl_original)
$key.Close()
if ($RevokePrivilege) { try { Revoke-TokenPrivilege -Privilege SeTakeOwnershipPrivilege,SeRestorePrivilege } catch {} }
}
}
}
function Grant-DComPermission {
<#
.SYNOPSIS
Grants DCOM Permissions to a specified Application ID's Launch/Activation, or Access permissions
.DESCRIPTION
Grants individual "Access Permissions" or "Launch and Activation Permissions" to a specified Application ID for a specific account
.PARAMETER ApplicationID
The Application ID for the DCOM object
.PARAMETER Type
Indicates which type of permissions to grant
Valid options: Launch, Access
.PARAMETER Account
Account in the form of "Domain\Username". Specify only the username for local accounts.
.PARAMETER Permissions
List of permissions to grant
Valid options for Launch: ALL, LocalLaunch, LocalActivation, RemoteLaunch, RemoteActivation
Valid options for Access: ALL, LocalAccess, RemoteAccess
.PARAMETER Deny
Create a DENY access control entry instead of an ALLOW entry
.PARAMETER PassThru
Outputs the ApplicationID and Type parameters. This is useful for piping to Get-DCOMPermission.
If not specified, nothing is outputted.
.PARAMETER OverrideConfigurationPermissions
For some DCOM objects (such as RuntimeBroker), Administrators do not have the needed "Configuration Permissions" to change the Launch or Access permissions.
In these cases, an access denied error is generated. To avoid this error, specify this option.
If this option is enabled and an access denied error occurs, then the "Configuration Permissions" will be temporarily changed (taking ownership as needed) to allow the DCOM permission change to succeed. Once complete, the configuration permissions and ownership are restored to the original values.
.EXAMPLE
Grant-DCOMPermission -ApplicationID "{9CA88EE3-ACB7-47C8-AFC4-AB702511C276}" -Account "SYSTEM" -Type Launch -Permissions LocalLaunch,LocalActivation
.INPUTS
String ApplicationID
String Type
String Account
String[] Permissions
Switch Deny
Switch PassThru
Switch OverrideConfigurationPermissions
.OUTPUTS
String ApplicationID
String Type
#>
param(
[Parameter(Mandatory=$true, ValueFromPipeline=$true)] [Alias("APPID")] [string] $ApplicationID,
[Parameter(Mandatory=$true)] [ValidateSet("Launch","Access")] [string] $Type,
[Parameter(Mandatory=$true)] [Alias('Acct','User','Username')] [string] $Account,
[Parameter(Mandatory=$true)] [ValidateSet("LocalLaunch","RemoteLaunch","LocalActivation",
"RemoteActivation","LocalAccess","RemoteAccess","ALL")] [string[]] $Permissions,
[Switch] $Deny,
[Switch] $PassThru,
[Alias("Override")] [Switch] $OverrideConfigurationPermissions
)
$ErrorActionPreference = "Stop"
Wrapper-DComPermission -Purpose Grant -ApplicationID $ApplicationID -Account $Account -Type $Type -Permissions $Permissions -Deny:$Deny -PassThru:$PassThru -OverrideConfigurationPermissions:$OverrideConfigurationPermissions
}
function Revoke-DComPermission {
<#
.SYNOPSIS
Revokes DCOM Permissions from a specified Application ID's Launch/Activation, or Access permissions
.DESCRIPTION
Removes individual "Access Permissions" or "Launch and Activation Permissions" form a specified Application ID for a specific account
.PARAMETER ApplicationID
The Application ID for the DCOM object
.PARAMETER Type
Indicates which type of permissions to revoke
Valid options: Launch, Access
.PARAMETER Account
Account in the form of "Domain\Username". Specify only the username for local accounts.
.PARAMETER Permissions
List of permissions to revoke
Valid options for Launch: ALL, LocalLaunch, LocalActivation, RemoteLaunch, RemoteActivation
Valid options for Access: ALL, LocalAccess, RemoteAccess
.PARAMETER Deny
Revoke a DENY access control entry instead of an ALLOW entry
.PARAMETER PassThru
Outputs the ApplicationID and Type parameters. This is useful for piping to Get-DCOMPermission.
If not specified, nothing is outputted.
.PARAMETER OverrideConfigurationPermissions
For some DCOM objects (such as RuntimeBroker), Administrators do not have the needed "Configuration Permissions" to change the Launch or Access permissions.
In these cases, an access denied error is generated. To avoid this error, specify this option.
If this option is enabled and an access denied error occurs, then the "Configuration Permissions" will be temporarily changed (taking ownership as needed) to allow the DCOM permission change to succeed. Once complete, the configuration permissions and ownership are restored to the original values.
.EXAMPLE
Revoke-DCOMPermission -ApplicationID "{9CA88EE3-ACB7-47C8-AFC4-AB702511C276}" -Account "SYSTEM" -Type Launch -Permissions LocalLaunch,LocalActivation
.INPUTS
String ApplicationID
String Type
String Account
String[] Permissions
Switch Deny
Switch PassThru
Switch OverrideConfigurationPermissions
.OUTPUTS
String ApplicationID
String Type
#>
param(
[Parameter(Mandatory=$true, ValueFromPipeline=$true)] [Alias("APPID")] [string] $ApplicationID,
[Parameter(Mandatory=$true)] [ValidateSet("Launch","Access")] [string] $Type,
[Parameter(Mandatory=$true)] [Alias('Acct','User','Username')] [string] $Account,
[Parameter(Mandatory=$true)] [ValidateSet("LocalLaunch","RemoteLaunch","LocalActivation",
"RemoteActivation","LocalAccess","RemoteAccess","ALL")] [string[]] $Permissions,
[Switch] $Deny,
[Switch] $PassThru,
[Alias("Override")] [Switch] $OverrideConfigurationPermissions
)
$ErrorActionPreference = "Stop"
Wrapper-DComPermission -Purpose Revoke -ApplicationID $ApplicationID -Account $Account -Type $Type -Permissions $Permissions -Deny:$Deny -PassThru:$PassThru -OverrideConfigurationPermissions:$OverrideConfigurationPermissions
}
Export-ModuleMember -Function Get-DComPermission, Grant-DComPermission, Revoke-DComPermission
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