DDoS attacks increased 33% in H1 2021

There has been a 33% increase in the number of DDoS attacks in H1 2021, according to a report published by Link11.

DDoS H1 2021

Between January and June, there were record numbers of attacks compared to the same period last year. The report also found that between Q1 2021 and Q2 2021 there was a 19% increase in DDoS campaigns, some of which were over 100 Gbps in attack volume; further evidence that hackers are continuing to exploit the vulnerabilities of businesses during the pandemic.

Key findings

  • The number of attacks continued to rise: + 33% increase year-on-year compared to H1/2020.
  • DDoS attacks are increasing: +19% in Q2 2021 compared to Q1 2021.
  • Overall attack bandwidth remained high: 555 Gbps in maximum attack volume.
  • Sharp increase in attack bandwidth: +37% increase in H1/2021 compared to H1/2020.
  • Number of high-volume attacks > 100 Gbps in H1/2021: 28

Criminals targeted those organizations and institutions that were in high demand during the global pandemic, such as vaccination websites, e-learning platforms or portals and businesses IT infrastructure.

The use of extortion emails has reached critical levels. Employees have received malicious emails from a multitude of different senders including Fancy Bear, Lazarus Group and most recently Fancy Lazarus. The frequency of these campaigns has increased, ransom demands have skyrocketed and they could continue well into Q3 2021.

The scale of DDoS activity far exceeds any from previous years

According to security experts, the intensity and regularity of extortion emails has noticeably increased. The scale of DDoS activity far exceeds any from previous years and the number of businesses experiencing serious security breaches has risen sharply. The consequences of such an attack can be severe, from loss of revenue to sensitive data being compromised.

Marc Wilczek, Managing Director of Link11, said: “In an increasingly connected world, the availability and integrity of IT systems are critical to any business. Our research for the first half of 2021 shows that companies are continuously exposed to DDoS attacks and that they are far more frequent and complex.

“Due to the increasingly sophisticated attack techniques being used by hackers, many security tools are reaching their limits. This means that solutions which provide maximum accuracy and speed in detecting and mitigating the attacks are more in demand than ever before.”

Companies still greatly unprepared

Although the threat level of DDoS attacks has remained high and security providers have provided persistent warnings, some companies are still lack the relevant security solutions to prevent an attack. In a number of cases, organizations have been found to be completely unprotected and operations have been brought to a standstill.

As threat levels continue to rise, businesses should take this opportunity to conduct a thorough review of their cybersecurity posture. They are also warning if you fall victim to a DDoS attack do not respond to extortion attempts and call in a specialist as soon as a breach has been detected.




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