Almost half of ransomware victims have data stolen before they can even detect an intrusion

• ExtraHop’s Global Threat Landscape Report shows 49% of ransomware victims only detected attacks after data theft, up from 31% last year
• Average dwell time before detection is 2.5 weeks; attackers exploit encrypted channels, valid accounts, and alert fatigue to evade defenses
• Ransom payments fell from $3.6M to $2.8M, but payment frequency rose sharply, with 83% of surveyed victims paying in 2026 vs. 70% in 2025

Criminals are getting better at hiding within their victims’ infrastructure, lurking and stealing files without triggering any alarms whatsoever.

Earlier today, network detection and response experts ExtraHop released the “Global Threat Landscape Report”, based on a survey of more than 1,800 IT and security leaders worldwide. In it, it is said that roughly half (49%) of organizations that were struck by ransomware did not detect the threat until after the data was stolen.

This is up from 31% a year ago, ExtraHop stressed, showing the improvement criminals made within just 12 months.

Several factors

On average, cybercriminals have 2.5 weeks of quiet time before being spotted in ransomware incidents, the report stated. Furthermore, 14% of victims were unaware of an attack until receiving a ransom demand, which is also up from 6% a year ago.

“Prolonged dwell times often parallel a highly complex threat environment where critical alerts are obscured,” ExtraHop said in a press release shared with TechRadar Pro. The researchers uncovered several factors that led to delays in investigating critical alerts, including attackers using encrypted channels (41%), attacker activity mirroring legitimate workflows and processes (38%), using valid, high-privilege account permissions (34%), and alert fatigue (30%). Undermined baseline behavior also enabled anomalous actions to fly under the radar (27%).

The good news is that the average ransom payment dropped year-on-year, from $3.6 million down to $2.8 million. However, the bad news is that the payment frequency spiked. While in 2025 70% of respondents paid a ransom, this year 83% have done the same, at least among ExtraHop’s respondents.

When Chainalysis ran a similar survey recently, it said that in 2025 the number of successful ransomware attacks grew, while the number of payments remained relatively flat, meaning that in absolute numbers - there were fewer companies paying ransomware attackers.