The latest Gcore Radar report analyzing attack data from Q1–Q2 2025, reveals a 41% year-on-year increase in total attack volume. The largest attack peaked at 2.2 Tbps, surpassing the 2 Tbps record in late 2024. Attacks are growing not only in scale but in sophistication, with longer durations, multi-layered strategies, and a shift in target industries. Technology now overtakes gaming as the most attacked sector, while the financial services industry continues to face heightened risks.
Key takeaways: the evolving DDoS landscape
Here are five key insights from the Q1–Q2 2025 Gcore Radar report:
- Attack volumes are rising. Total attacks climbed from 969,000 in H2 2024 to 1.17 million in H1 2025, a 21% increase over the previous two quarters and 41% YoY growth.
- Attack size continues to grow. The peak attack of 2.2 Tbps demonstrates the increasing scale and destructive potential of modern DDoS campaigns.
- Attacks are becoming longer and more sophisticated. Extended durations and multi-layered tactics allow threat actors to bypass defenses and maximize disruption.
- The industries targeted are shifting. Technology overtakes gaming as the top target, while financial services is being increasingly targeted.
- Application-layer attacks are on the rise. Multi-vector assaults targeting web applications and APIs now account for 38% of total attacks, up from 28% in Q3–Q4 2024.
DDoS attack frequency has surged
Gcore Radar highlights a continued upward trajectory in DDoS activity. Compared to H2 2024, attack volumes rose 21%, while YoY growth reached 41%, underscoring a long-term escalation trend. Several factors contribute to this rise:
- Accessible attack tools: Cheap DDoS-for-hire services empower more threat actors.
- Vulnerable IoT devices: Unsecured devices are hijacked into large-scale botnets, amplifying attack volumes.
- Geopolitical and economic tensions: Global instability drives more frequent and targeted attacks.
- Advanced attack techniques: Multi-vector and application-layer attacks increase both complexity and impact.
The largest attack reached 2.2 Tbps
The peak assault in Q1–Q2 2025 hit 2.2 Tbps, surpassing late 2024’s 2 Tbps attack. While attacks exceeding 1 Tbps remain rare, their frequency is rising, highlighting attackers’ growing ambition to overwhelm networks, applications, and services. Even smaller attacks can incapacitate unprotected systems.
Industries targeted are shifting
Technology now represents 30% of all DDoS attacks, overtaking gaming (19%). Hosting providers supporting SaaS, e-commerce, gaming, and financial clients are particularly vulnerable, as a single attack can trigger ripple effects across multiple dependent businesses.
Financial services account for 21% of attacks. Banks and payment systems are prime targets due to high disruption potential, regulatory sensitivity, and ransomware risk.
Gaming continues to face significant threats, but improved defenses and strategic attacker shifts reduced its share from 34% in…
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