A denial of service (DoS) attack is to force a failure of the target system by creating a condition in which users cannot access the attacked servers. A successful attack can force all sorts of subsequent scenarios, including filtering a database, extracting source code or simply keeping the website attacked offline.

Federal Bureau of Investigation (FBI) agents even employ DoS tactics to bring down onion websites, as they are much more susceptible to these attacks than conventional websites.

This time, ethical hacking specialists from the International Institute of Cyber Security (IICS) will show you how you can launch a powerful DoS attack on onion websites using a simple tool and a few commands.

For this:

  • Install the Torshammer tool
  • In the file itself, replace the three values “9050” with “9150” and save these settings
  • Open a terminal and type the following command:

cd torshammer

  • We’ll start adding:

./ -t example.onion -r 300 –T

Remember that this article was prepared for strictly academic purposes, so IICS is not responsible for any misuse that may be given to this tool. To learn more about information security risks, malware variants, vulnerabilities and information technologies, feel free to access the International Institute of Cyber Security (IICS) websites.