DDoS Attack Examples (2023): The 7 Worst Attacks Ever

By Tibor Moes / Updated: May 2023

DDoS Attack Examples (2023): The 10 Worst Attacks Ever

DDoS Attack Examples

Imagine you’re hosting a party and all of a sudden, an army of uninvited guests shows up, eating all the food, and leaving no room for your actual friends. That’s similar to a DDoS attack in the digital world.

In this article, we’re going to look at some of the worst DDoS attack examples that have happened.


A DDoS attack is designed to take down websites and networks. It is a form of cybercrime that sends a huge torrent of fake traffic to online services, like websites, until they freeze or break. 

  1. Project Rivolta (2000): This attack, launched by a 15-year-old Canadian hacker, managed to take down major websites like Yahoo, Amazon, and eBay.
  2. Estonia DDoS Attack (2007): During a political dispute with Russia, Estonia was hit by a massive DDoS attack which crippled its government, banking, and media websites.
  3. Operation Payback (2010): Activists targeted the Motion Picture Association of America (MPAA) and the Recording Industry Association of America (RIAA) websites in protest of anti-piracy efforts.
  4. Spamhaus DDoS Attack (2013): This attack peaked at a whopping 300 Gbps, which made it the largest attack in history at that time.
  5. Dyn DDoS Attack (2016): A large portion of the internet was disrupted, including Twitter, Reddit, Netflix, and CNN, when the Dyn DNS provider was targeted.
  6. GitHub DDoS Attack (2018): GitHub was hit by the then-largest-ever DDoS attack, peaking at 1.35 Tbps.
  7. Amazon DDoS Attack (2020): Amazon Web Services reported a DDoS attack with a peak traffic volume of 2.3 Tbps, breaking the record set by the GitHub attack.

Don’t become a victim of cybercrime. Protect your devices with the best antivirus software and your privacy with the best VPN service.

DDoS Attack Examples In-Depth

1. Project Rivolta (2000)

In the year 2000, the peace of the digital world was shattered by a young Canadian hacker, known only by his online handle, “Mafiaboy.” The teenager launched what came to be known as Project Rivolta, a DDoS attack that shook the foundations of some of the biggest names on the internet.

The attack started in February and stretched over a week. Major websites like Yahoo, Amazon, and eBay were overwhelmed by a flood of digital noise, their services grinding to a halt under the onslaught. For many users across the globe, these popular sites became unreachable, illustrating the international scope of the attack.

The financial impact was significant. Yahoo, the most popular search engine at the time, suffered greatly, along with businesses relying on these platforms for their operations. Although exact numbers are hard to come by, the losses were estimated in the hundreds of millions of dollars.

The attack didn’t compromise any user data, but it demonstrated a sobering vulnerability. Mafiaboy had singlehandedly disrupted the flow of the internet, affecting millions of people worldwide.

In the aftermath of the attack, companies bolstered their defenses, implementing measures to better handle such incidents. As for Mafiaboy, his reign of digital chaos ended when he was arrested and pleaded guilty. The attack he orchestrated served as a wake-up call to the world, underlining the very real threats posed by cyber attacks.

2. Estonia DDoS Attack (2007)

Fast forward seven years to 2007, a bitter political dispute between Estonia and Russia took a dramatic digital turn. In April and May, Estonia was hit by a massive DDoS attack, crippling its government, banking, and media websites for weeks. It was a national crisis—the first of its kind—bringing a country’s digital infrastructure to its knees.

The perpetrators were never officially identified, but many suspected Russian involvement, given the ongoing political tensions. This attack highlighted how a state-sponsored entity could potentially weaponize DDoS attacks, adding a sinister layer to international conflicts.

The cyber onslaught was national in scope, but its effects were felt beyond Estonia’s borders. As a highly digital society, the country’s banking system was severely affected, disrupting financial transactions for Estonians at home and abroad.

Fortunately, the attack didn’t compromise sensitive data, but it caused widespread inconvenience and alarm. It was a wakeup call for Estonia, prompting significant investment in cyber defense and making the country one of the world leaders in this field.

The attack led to the creation of NATO’s Cooperative Cyber Defence Centre of Excellence in Tallinn, Estonia. While there were no direct legal consequences due to the difficulty in attributing the attack, the incident served as a stark reminder of the potential for cyber warfare in the digital age.

3. Operation Payback (2010)

In the late summer of 2010, a group of activists decided to take a stand against what they saw as an assault on the freedom of the internet. Under the banner of “Operation Payback,” these digital dissenters, known as Anonymous, targeted the websites of the Motion Picture Association of America (MPAA) and the Recording Industry Association of America (RIAA).

The attack was a response to the organizations’ stringent anti-piracy measures. It began in September and lasted for several months, with the MPAA and RIAA websites intermittently knocked offline. The geographic scope was international, as these websites are accessed worldwide.

While the financial damage was not officially disclosed, it can be inferred that the organizations suffered some losses due to downtime and the resources used to mitigate the attacks. However, no user data was compromised.

Anonymous, as a decentralized group, was difficult to prosecute, though several associated individuals were later arrested on various charges. The attack was eventually mitigated as the targeted websites bolstered their defenses and law enforcement agencies stepped up their efforts to track the attackers.

Operation Payback showed that DDoS attacks could be used as a form of protest, a way for the digital populace to express dissatisfaction and dissent, impacting millions of users globally.

4. Spamhaus DDoS Attack (2013)

In March 2013, a feud between Spamhaus, a spam-fighting organization, and Cyberbunker, a web hosting firm accused of facilitating spam, escalated into a full-blown DDoS attack. This attack didn’t just break records—it smashed them.

At its peak, the attack reached a staggering 300 Gbps, making it the largest DDoS attack ever seen at that time. The attack, which lasted for more than a week, didn’t just affect Spamhaus and Cyberbunker. It slowed down the internet globally, affecting millions of users and businesses.

The financial damage was difficult to quantify due to the widespread slowdown, but the cost was undoubtedly substantial. While the attack did not compromise personal data, it showed how a dispute between two entities could spiral into a problem affecting people worldwide.

The countermeasures taken by Spamhaus, with assistance from internet security companies and law enforcement, eventually mitigated the attack. The aftermath saw Cyberbunker’s owner arrested and subsequently released.

The Spamhaus attack emphasized the importance of robust defenses against DDoS attacks, highlighting the potential for significant disruption even when the initial dispute seemed relatively minor. It demonstrated the need for cooperation and collective defense mechanisms to ensure the stability of the internet.

5. Dyn DDoS Attack (2016)

In October 2016, the digital world was rocked by a new kind of DDoS attack. This time, the target was Dyn, a major provider of DNS services. Like a city’s switchboard, Dyn directed traffic for a large portion of the internet, making it a high-value target.

The attack, which lasted the better part of a day, disrupted access to major websites like Twitter, Reddit, Netflix, and CNN. As these websites have a global user base, the attack had an international scope, affecting millions of users and businesses worldwide.

The financial damage was significant. Not only did Dyn suffer losses, but businesses that relied on these platforms for their operations also took a hit. In terms of compromised data, the attack didn’t result in data theft, but it caused widespread disruption and inconvenience.

The attack was mitigated by Dyn’s response team, but the aftermath saw an increased focus on securing DNS providers against such attacks. The incident was a stark reminder of the fundamental vulnerabilities in the structure of the internet. Unfortunately, the perpetrators were never identified, highlighting the challenges in attributing such attacks.

6. GitHub DDoS Attack (2018)

In February 2018, GitHub, a popular platform for software developers, was hit by a gargantuan DDoS attack. The attack peaked at an unprecedented 1.35 Tbps, making it the largest DDoS attack ever recorded at that time.

The attack lasted for about 20 minutes, but in that short span of time, GitHub’s services were completely disrupted. With millions of developers relying on GitHub for their work, the impact was global.

GitHub acted quickly, using its DDoS protection service to successfully mitigate the attack. Although the attack was massive, it did not compromise any user data. The financial implications for GitHub aren’t public, but the potential for loss was significant given the number of users and businesses affected.

The GitHub attack showed how even tech-savvy organizations are not immune to DDoS attacks. Following the attack, the tech industry rallied to further bolster their defenses, underscoring the importance of preparedness and rapid response capabilities.

7. Amazon DDoS Attack (2020)

2020 saw a new record set in the annals of DDoS attacks. In February, Amazon Web Services (AWS), the largest cloud service provider in the world, reported a DDoS attack with a peak traffic volume of 2.3 Tbps.

This attack disrupted AWS services, affecting countless businesses and individuals globally that rely on Amazon’s cloud infrastructure. Although the attack lasted only a few hours, the potential for financial damage was immense given AWS’s large customer base. No customer data was compromised in the attack.

Amazon’s robust defenses and quick response mitigated the attack, but it served as a wake-up call to businesses worldwide. It underscored the need for robust security measures, not just at the individual or corporate level, but also at the infrastructure level.

The Amazon attack, like those before it, demonstrated the evolving threat of DDoS attacks and the critical importance of cybersecurity measures in the increasingly interconnected digital world.


As we’ve seen through these examples, DDoS attacks can bring even the giants of the internet to their knees. But that doesn’t mean we are helpless. By taking proactive steps, we can strengthen our defenses and reduce the chances of becoming victims ourselves.

Firstly, always keep your devices up to date. Software updates often include patches for security vulnerabilities that could be exploited in a DDoS attack. So, don’t ignore that update notification!

Secondly, consider investing in trustworthy antivirus software for Windows 11 like Norton, Bitdefender, McAfee, Panda, or Kaspersky. These programs offer an extra layer of security, protecting against various types of malware that could turn your device into a pawn in a larger DDoS attack.

Remember, cybersecurity is not a one-time fix but a continuous process. Stay informed about the latest threats and the best practices for defending against them.

Here are some trusted resources where you can learn more:

  1. National Institute of Standards and Technology (NIST)
  2. Cybersecurity & Infrastructure Security Agency (CISA)
  3. European Union Agency for Cybersecurity (ENISA)
  4. The CyberWire
  5. Krebs on Security

By staying vigilant and informed, we can each play our part in making the internet a safer place for everyone.

Author: Tibor Moes

Author: Tibor Moes

Founder & Chief Editor at SoftwareLab

Tibor has tested 39 antivirus programs and 30 VPN services, and holds a Cybersecurity Graduate Certificate from Stanford University.

He uses Norton to protect his devices, CyberGhost for his privacy, and Dashlane for his passwords.

You can find him on LinkedIn or contact him here.