In addition, the attacker does not direct the DDoS traffic to a specific system or server. The data traffic per IP address is so low that many protection solutions do not recognise them as an anomaly, meaning attacks often fly under the radar. These attacks are technically very complex. Misused cloud servers as DDoS weapons: In every third DDoS attack (33 %), the attackers relied on cloud instances.Ĭarpet Bombing: Targeted attacks on operators of ICT infrastructuresĬarpet bombing attacks are evolving into a major challenge for hosting and cloud providers, ISPs and carriers.Increasing complexity of attack patterns: 78% of attacks were multi-vector attacks combining several techniques.In addition, there were over 100 attacks with more than 50 Gbps peak bandwidth. The attack bandwidths remained very high: the largest attack was stopped at 633 Gbps.The increase in the number of attacks even amounted to over 1,000 %, if the carpet bombing attacks explained below are no longer counted as a whole, but as thousands of individual attacks.The number of attacks continued to increase: 17% increase in the number of attacks compared to Q3 2020.Key figures from the Link11 network on the DDoS threat situation in Q3 2021 This development poses major challenges to many protection concepts that only focus on one layer or specific attack vectors and pushes them to their limits. The proportion of multi-vector attacks targeting multiple protocols and vulnerabilities, and thus different layers, increased significantly from 62% in Q2 2021 to 78% in Q3 2021. While single attack methods are declining, multi-vector attacks are becoming the norm in the DDoS threat landscape. Furthermore, the attacks on the same customer added up to 2.5 Tbps within 120 minutes. The largest attack was stopped at 633 Gbps. In addition, the maximum bandwidth more than doubled – by 159 % – compared to the same period last year. In 130 attacks, the maximum attack bandwidth exceeded 50 Gbps. Link11’s Security Operation Centre (LSOC) registered an increasing number of high-volume attacks. In addition to the worsening of the threat situation in terms of the number of attacks, the increase in attack bandwidths and the rising complexity in attack techniques are also noticeable. After Q2 2021 had already shown an increase of 19% compared to the same period of the previous year, the number of attacks rose by another 17% in Q3.Īttack volume and complexity of attack patterns are on the rise Link11 has released new data from its network on the development of the DDoS threat: The number of attacks remains at a very high level in Q3 2021.
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