Businesses hide vast majority of ransomware attacks, report finds

Dive Brief

The security firm BlackFog said the number of disclosed incidents it tracked in Q1 was roughly one-tenth of the number of undisclosed incidents.

Published May 7, 2026

First published on

Dive Brief:

• Companies around the world have been keeping the vast majority of ransomware attacks secret, according to a new report from the security firm BlackFog.
• The number of undisclosed attacks in the first quarter of 2026 was almost 10 times as large as the number of disclosed attacks, according to the report published Wednesday.
• BlackFog’s report, based on information from dark-web leak sites, also includes data on the most targeted sectors and new tools that have emerged in the cybercrime ecosystem.

Dive Insight:

BlackFog’s threat intelligence team identified 264 publicly disclosed ransomware attacks in the first three months of 2026, but it also identified 2,160 undisclosed attacks. While the number of disclosed attacks represented a 15%...

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