Check-ASN for Burp Suite

Check-ASN is a Burp Suite extension that identifies the organization name associated with the IP address of each HTTP request in the HTTP history tab. It uses the ipinfo.io API to retrieve ASN and extracts the organization name for annotation.

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Features

• Resolves domain names from HTTP requests to IP addresses.
• Retrieves and displays the organization name associated with the IP using the ipinfo.io API.
• Annotates HTTP history entries with the organization name for easy identification.
• Lightweight and easy to integrate into your Burp Suite workflow.

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Installation

1. Prerequisites

   • Ensure you have Jython installed. You can download it from jython.org.
   • Add the Jython standalone JAR file to Burp Suite under Extender > Options > Python Environment.

2. Download the Extension

   • Clone this repository or download the extn.py script.

3. Load the Extension

   • Open Burp Suite and navigate to Extender > Extensions.
   • Click Add and select the following options:
     • Extension type: Python
     • Extension file: Select the downloaded extn.py script.

4. Verify Installation

   • Once loaded, you should see Check-ASN listed as a loaded extension in the Extender tab.
   • Make HTTP requests and observe the HTTP history tab for organization annotations in the Notes column.

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Usage

• This extension runs automatically when loaded.
• The organization name for each HTTP request is added as a comment in the HTTP history tab.
  • Example: If a request is made to www.amazon.com, the comment might show Organization: Amazon.com, Inc..

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Troubleshooting

• No Comments Appearing:

  • Ensure the target domain resolves to a valid IP address.
  • Verify your network connection to the ipinfo.io API.

• Error Logs:

  • Check the Extender Output tab for detailed error messages.
  • Common issues include DNS resolution errors or network restrictions.

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API Note

• This extension uses the free ipinfo.io API. For high-volume use or additional features, consider obtaining an API key from ipinfo.io.

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Contribution

Feel free to contribute by:

• Submitting pull requests for new features or bug fixes.
• Reporting issues in the GitHub Issues section.

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License

This project is licensed under the MIT License. See the LICENSE file for details.

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