Warning: Ransomware Attacks Surged By 63% Last Quarter
KnowBe4, Friday, July 25th, 2025
Ransomware attacks increased by 63% year-over-year in the second quarter of 2025, with a total of 276 publicly disclosed incidents, according to a new report from BlackFog.
Notably, there were far more ransomware attacks that weren't publicly disclosed. The researchers note, 'The figures also reveal that the scale of hidden activity remains significant, with 80.9% of all ransomware attacks going unreported. Across Q2 there were 1,446 undisclosed ransomware attacks marking a 19% increase compared to the same quarter in 2024.'
Of the publicly known ransomware attacks, the healthcare sector was the hardest hit, with 52 attacks last quarter. Additionally, attacks against the retail industry surged compared to the first quarter of 2025.