DShield Sensors Record Winter Surge in Malware Sample Uploads (Dec 2025 – Feb 2026)
What Happened – A year‑long analysis of files uploaded to the SANS DShield local and cloud sensors shows that malicious payload uploads peaked during the winter months (December 2025 – February 2026) and began to decline in March 2026. The study ranks the most frequently uploaded threats and visualizes month‑by‑month trends using Kibana and ES|QL queries.
Why It Matters for TPRM –
- Seasonal spikes can indicate heightened attacker activity that may target third‑party services.
- Vendors relying on DShield feeds for detection must ensure their controls adapt to fluctuating threat volumes.
- Understanding trend patterns helps risk managers forecast exposure windows and allocate monitoring resources efficiently.
Who Is Affected – Cloud‑hosted SaaS providers, Managed Service Providers (MSPs), security‑operations platforms, and any organization that integrates DShield threat intel into its defenses.
Recommended Actions –
- Review your threat‑intel ingestion pipelines for latency or gaps during identified peak periods.
- Validate that detection signatures and sandboxing capacities are scaled to handle winter‑time surges.
- Incorporate seasonal threat‑level adjustments into third‑party risk assessments and incident‑response playbooks.
Technical Notes – The analysis leveraged Kibana dashboards and two ES|QL queries to aggregate upload counts from DShield’s local and cloud sensors. No specific CVEs were cited; the focus is on aggregate malware sample volume and temporal distribution. Source: SANS Internet Storm Center – Analysis of a Year of Files Uploaded to DShield Sensors