How to Spoof Calls Using Kali Linux: Ethical and Legal Considerations

Making a fake call, often referred to as spoofing, can be illegal or unethical depending on your intent and local laws. However, if you have a legitimate reason for testing security systems or as part of an educational purpose, here's a general overview of how you might do this using Kali Linux.

Prerequisites

Before you begin, ensure that you have Kali Linux set up on your machine. Familiarity with the SIP (Session Initiation Protocol) is essential since many methods for spoofing calls rely on this protocol. You may also need VoIP software such as SIPVicious, Asterisk, or Linphone.

Using Asterisk for Call Spoofing

Install Asterisk

n bash sudo apt update sudo apt install asterisk

Configure Asterisk

Edit the configuration files located in /etc/asterisk/:

n bash vi /etc/asterisk/extension_

Modify the configuration to set up your SIP settings. Here’s a basic example:

n ini [general] contextdefault [yourusername] typefriend hostdynamic secretyourpassword

In the [default] section, set up the dialing context:

n ini [default] exten _X.1DialSIP/{EXTEN}20

Start Asterisk

n bash sudo systemctl start asterisk

Make a Call

To make a call, use the Asterisk CLI:

n bash sudo asterisk -rvvv CLI dial yourusername

Using SIPVicious for SIP Scanning and Spoofing

Install SIPVicious

n bash sudo apt install sipvicious

Run SIPVicious

You can use SIPVicious to scan for SIP devices and attempt to spoof calls. This typically involves using svmap and svcrack to find potential targets.

Important Considerations

Legal and Ethical Implications

Always ensure you have permission to test any systems and that you are in compliance with local laws. Unauthorized spoofing can lead to severe legal consequences.

Use Cases

This should only be used for ethical hacking and educational purposes or in controlled environments where you have explicit permission. Unauthorized tests can lead to violations of privacy and other legal issues.

Conclusion

While you can use Kali Linux tools to spoof calls, it is crucial to use them responsibly and ethically. If you are unsure about the legality of your actions, consult with a legal professional.