Industry Report

Zscaler ThreatLabz 2025 Ransomware Report

Ransomware attacks surge 146% year over year

Weaponized GenAI, faster execution, and extortion-first strategies are fueling a new age of ransomware. The impact: a 146% increase in ransomware attacks blocked by Zscaler and a 70% rise in public extortion.

Ransomware reaches new levels of impact and reinvention

Explore the latest ransomware trends and insights from Zscaler ThreatLabz, based on expert analysis of public leak sites, ransomware samples and attack data, and telemetry from the world’s largest cloud security platform.

In this report, you’ll learn the latest about:

• Top ransomware trends, targets, and tactics worldwide
• 5 ransomware families to watch out for in 2025–2026
• Predictions on what's next for the future of ransomware
• How ThreatLabz disrupts operations and helps victims recover
• Zero trust strategies and best practices to reduce ransomware risk