Configure NTLM Authentication

If the target network uses the NTLM protocol to verify user’s access rights, you need to set up an NTLM authentication object. The protocol requires a user to be authenticated by providing a username and a corresponding password. After the user’s log-in credentials have been recognized, the network can then check access rights and allow the user to enter.

Therefore, you can grant Neuralegion access to an NTLM authenticated network you are going to use for a scan by providing your credentials, workstation name and the network domain.

Prerequisites

  • You are an active user in the NeuraLegion App.
  • Your application and authenticated resources are accessible to the NeuraLegion engine, either directly from the Internet or via a Repeater.

Step-by-Step Guide

  1. Go to the NeuraLegion App.
  2. In the left pane, select Authentications.
  1. On the My Authentications page, click + Create Authentication.
  1. In the CREATE & TEST AUTHENTICATION dialog box, complete the fields of the following configuration sections.

Authentication Details

In this section, specify the details of the authentication object you want to create.

Field Guidelines
Authentication name Enter the authentication object name.
Description (Optional) Enter the authentication object description. For example, you can specify the application type or other information that helps you distinguish your created object.
Authentication type From the Authentication type drop-down list, select NTLM authentication.

Authentication Setup

In this section, set up a valid authentication request to be sent to the end-point API. For that, complete the Authentication Setup fields.

Field Guidelines
Username Enter the NTLM username.
Password Enter the NTLM password.
Domain Enter the domain of the NTLM network you need to get access to.
Workstation Enter your workstation name, for example a computer name. The maximum length of a workstation name is 64 characters.

Authentication Triggers

In this section, select the options you want to use during the application scanning to determine if the authentication flow is no longer valid and the authenticated resources cannot be reached. The options define how the application responds in case the authentication flow fails.

Field Guidelines
Detect using response status Enter the HTTP response that will tell you about the authentication failure.
Detect using header pattern Enter the header and Regex pattern that will tell about the authentication failure.
Detect using body pattern Enter the body pattern that will tell you about the authentication failure.

Valid Session Tester

The preliminary testing helps you verify if the authentication object has been configured correctly.

Field Guidelines
Protocol From the drop-down list, select the HTTPS or WebSockets protocol to be used for authentication.
Method Select the HTTP method of an active tester end-point (authenticated resource).
Validation URL Enter the URL of the authenticated (protected) resource to test if the authentication scenario is configured correctly. The validation URL should be different from the authentication URL.
Header name Select an additional header to be appended to the request sent to the tester end-point.
Header value Enter the template of the expected value (interpolation string) created using the String Interpolation Syntax.
Body Enter the HTTP request body to be appended to the request sent to the tester end-point, for example:{“user”: “foo”, “pass”: “bar”}’. You can interpolate the body using the String Interpolation Syntax.
Maximum number of redirects to follow Enter the maximum number of redirections that Nexploit should follow during the authentication process.

Pro Tips: Select the checkbox Change redirected method to get for the redirects with code 302, where the server expects the following methods to always be GET during redirects and not the original method that triggered the redirect.
Repeater If you use a local Repeater to reach the scan target, select it from the drop-down list to connect it to the scan.

Once you have completed the Valid Session Tester fields, click Test Authentication.

  • A valid authentication object returns three success messages indicated in the relevant Test Results sections:
    • Test Authentication Triggers
    • Authentication call
    • Access Protected Resource

In this case, you can save the configured object and add it to your scans.

  • If the test results include a failure message, go back to the object configurations and verify their correctness. Use the test request/response data to find a certain failure and fix it.

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