Operation KillSwitch: Police Dismantle KillSec Ransomware Group

Europol and international law enforcement dismantled the KillSec ransomware group, led by a 16-year-old, shutting down their dark web leak site and seizing over 110 terabytes of stolen data from around 1,000 attacks worldwide. The group exploited software vulnerabilities and weak security, using AI to select targets, and authorities arrested three suspects while conducting searches across multiple European countries and the UK.

This Wire brief sits within Fusion42's coverage of Security Infrastructure, and 6 sources have reported it between 1 Oct 2026 and 5 Oct 2026.