内网的一台服务器上的装机默认用户密码忘记了，但是好在别的电脑上使用RDCMan（Remote Desktop Connection Manager）连接过这台服务器，并且保存了密码。于是经过一番折腾，最后把密码找回来了：
最后成功的powershell脚本来自于这个地址：
https://www.undocumented-features.com/2019/10/03/decrypting-credentials-stored-in-remote-desktop-manager-rdcman-rdg/
但是能找到这个地址是因为园子里这篇文章给出的三个方案，就有powershell，
https://www.cnblogs.com/Thorndike/p/15325079.html
因为不好使，就根据脚本里面的关键字去搜索，才找到的。（百度和bing都没有有效的结果，这次实际上发挥作用的是google）
最终有效的脚本是这个：
1 # Decrypt passwords in RDG files
2 param($RDGFile,
3 $PasswordString,
4 $RDCManSource
5 )
6 If (!$RDCManSource)
7 {
8 $RDCManSource = (Get-ChildItem -Path @('C:\Program Files\Microsoft', 'C:\Program Files (x86)\Microsoft') -File "RDCMan.exe" -Recurse -ErrorAction SilentlyContinue)[0]
9 }
10 If (!$RDCManSource)
11 {
12 Write-Error "Remote Desktop Manager must be installed. If it is installed, use the -RDCManSource parameter to specify the executable's location."
13 Exit
14 }
15 else
16 {
17 Write-Host "goto RDCManSource."
18
19 Write-Host $RDCManSource.FullName
20 try
21 {
22 $Assembly = [Reflection.Assembly]::LoadFile($RDCManSource)
23 }
24 catch
25 {
26 $_.Exception.Message.ToString();
27 Write-Host "Catch"; Exit
28 }
29 try { Import-Module $Assembly }
30 catch
31 {
32 $_.Exception.Message.ToString();
33 Write-Host "Import Exception"; exit }
34 }
35 If ($RDGFile)
36 {
37 Write-Host "goto RDGFile."
38 Write-Host
39 [xml]$Data = Get-Content $RDGFile
40 $CredentialValues = $Data.SelectNodes("*//logonCredentials")
41 $global:Output = @()
42 foreach ($obj in $CredentialValues)
43 {
44 try
45 {
46 $EncryptionSettings = New-Object -TypeName RdcMan.EncryptionSettings
47 $Password = [RdcMan.Encryption]::DecryptString($obj.password, $EncryptionSettings)
48 }
49 catch
50 {
51 $_.Exception.Message.ToString(); continue
52 }
53 If ($Password -and ($Password -notcontains 'Failed to decrypt'))
54 {
55 $CredObject = New-Object PSObject
56 $CredObject | Add-Member -Type NoteProperty -Name "ProfileName" -Value $obj.ProfileName -ea SilentlyContinue -Force
57 $CredObject | Add-Member -Type NoteProperty -Name "UserName" -Value $obj.username -ea SilentlyContinue -Force
58 $CredObject | Add-Member -Type NoteProperty -Name "Password" -Value $Password
59 $CredObject | Add-Member -Type NoteProperty -Name "Domain" -Value $obj.domain
60 $global:Output += $CredObject
61 }
62 }
63 If ($Output)
64 {
65 $Output
66 }
67 Else
68 {
69 Write-Host "Nothing to show."
70 }
71 }
72 else
73 {
74 If ($PasswordString)
75 {
76 $EncryptionSettings = New-Object -TypeName RdcMan.EncryptionSettings
77 $Password = [RdcMan.Encryption]::DecryptString($PasswordString, $EncryptionSettings)
78 Write-Host "Cleartext password: $($Password)"
79 }
80 }
需要注意的是，我电脑上使用的是绿色版，所以是传参进来的
.\dops2 -RDGFile '.\本地电脑.rdg' -RDCManSource 'D:\Green\RDCMan\RDCMan.exe'
其它另外一个尝试过的脚本：
1 function Decrypt-RDCMan ($FilePath) {
2 <#
3 .SYNOPSIS
4
5 This script should be able to decrpt all passwords stored in the RDCMan config file
6
7 Function: Decrypt-RDCMan
8 Author:Ben Turner @benpturner, Rich Hicks @scriptmonkey_
9
10 .EXAMPLE
11
12 Decrypt-RDCMan -FilePath
13 #>
14 if (!$FilePath) {
15 [xml]$config = Get-Content "$env:LOCALAPPDATA\microsoft\remote desktop connection manager\rdcman.settings"
16 $Xml = Select-Xml -Xml $config -XPath "//FilesToOpen/*"
17 $Xml | select-object -ExpandProperty "Node"| % {Write-Output "Decrypting file: " $_.InnerText; Decrypt-RDCMan $_.InnerText}
18 } else {
19 Write-Host "Get-Content FilePath"
20 $file = Get-Content $FilePath
21 Write-Host $file
22 [xml]$Types = Get-Content $FilePath
23
24 $Xml = Select-Xml -Xml $Types -XPath "//logonCredentials"
25
26 # depending on the RDCMan version we may need to change the XML search
27 $Xml | select-object -ExpandProperty "Node" | % { $pass = Decrypt-DPAPI $_.Password; $_.Domain + "\" + $_.Username + " - " + $Pass + " - " + "Hash:" + $_.Password + "`n" }
28
29 # depending on the RDCMan version, we may have to use search through the #text field in the XML structure
30 $Xml | select-object -ExpandProperty "Node" | % { $pass = Decrypt-DPAPI $_.Password."#text"; $_.Domain + "\" + $_.Username + "`n" + $Pass + " - Hash: " + $_.Password."#text" + "`n"}
31 }
32 }
33
34 function Decrypt-DPAPI ($EncryptedString) {
35 # load the Security Assembly into the PS runspace
36 Add-Type -assembly System.Security
37 $encoding= [System.Text.Encoding]::ASCII
38 $uencoding = [System.Text.Encoding]::UNICODE
39
40 # try and decrypt the password with the CurrentUser Scope
41 try {
42 $encryptedBytes = [System.Convert]::FromBase64String($encryptedstring)
43 $bytes1 = [System.Security.Cryptography.ProtectedData]::Unprotect($encryptedBytes, $null, [System.Security.Cryptography.DataProtectionScope]::CurrentUser)
44 [System.Text.Encoding]::Convert([System.Text.Encoding]::UNICODE, $encoding, $bytes1) | % { $myStr1 += [char]$_}
45 echo $myStr1
46 }
47 catch {
48 # try and decrypt the password with the LocalMachine Scope only if the CurrentUser fails
49 try {
50 $encryptedBytes = [System.Convert]::FromBase64String($encryptedstring)
51 $bytes1 = [System.Security.Cryptography.ProtectedData]::Unprotect($encryptedBytes, $null, [System.Security.Cryptography.DataProtectionScope]::LocalMachine)
52 [System.Text.Encoding]::Convert([System.Text.Encoding]::UNICODE, $encoding, $bytes1) | % { $myStr1 += [char]$_}
53 echo $myStr1
54 }
55 catch {
56 echo "Could not decrypt password"
57 }
58 }
59 }
View Code
园子里Thorndike提供的那个脚本，我文字识别再手工修正：
Copy-Item 'C:\Program Files (x86)\Microsoft\Remote Desktop Connection Manager\RDCMan.exe' 'C:\windows\temp\RDCMan.dll'
Import-Module 'C:\windows\temp\RDCMan.dll'
$EncryptionSettings=New-Object-TypeName RdcMan.EncryptionSettings
$lines=Get-Content RDCManpass.txt
foreach ($line in $lines){
$PwdString= $line
[RdcMan.Encryption]::DecryptString($PwdString,$EncryptionSettings)
}
windows 10系统直接执行脚本会报错：
解决办法：
https://blog.csdn.net/qq_15585305/article/details/131436046
另外PowerShell脚本传参，参考了这篇：
https://blog.csdn.net/wan_ghuan/article/details/104346908
标签：找回,RDCManager,System,RDCMan,Write,_.,Host,Password,powershell From： https://www.cnblogs.com/xpnew/p/17594015.html