DigiCert Q4 2025 Report Highlights Sustained Cyber Threats and Evolving DDoS Tactics
Event summary
- DigiCert released its Q4 2025 RADAR Threat Intelligence Brief on January 29, 2026, analyzing trillions of network events across its global security platform.
- Internet traffic demand remained elevated throughout Q4, with sustained high load replacing traditional peak periods.
- DDoS attacks increased in frequency, scale, and duration, shifting from short disruptions to prolonged pressure on systems.
- Application-layer threats were highly automated and focused on persistent probing rather than obvious disruptions.
- DigiCert’s data highlights the emergence of the Aisuru and Kimwolf botnets as significant threats.
The big picture
DigiCert’s Q4 2025 report underscores a broader industry shift toward sustained cyber threats, where traditional peak-demand periods no longer offer recovery windows. The rise of automated, prolonged attacks signals a need for continuous, layered security strategies. As internet infrastructure faces constant pressure, organizations must adapt to ensure resilience against evolving threats.
What we're watching
- Infrastructure Resilience
- How sustained high demand and prolonged attacks will force enterprises to rethink their security architectures.
- Automated Threats
- Whether current defenses can effectively counter the persistent, low-profile probing of application layers.
- Botnet Evolution
- The pace at which new botnets like Aisuru and Kimwolf will drive more sophisticated attack strategies.
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