Police take down dangerous KillSec ransomware gang — and find out it's being run by a teenager
- Operation KillSwitch dismantled KillSec, seizing infrastructure, cryptocurrency, and 110TB data
- Investigation identified core members; several arrests made, including key operators
- KillSec claimed 1,000 attacks, targeting healthcare, finance, government, and SMBs
The infamous ransomware group KillSec is no more after Europol, together with multiple national law enforcement agencies and cybersecurity companies, seized the group’s infrastructure and data, made a few arrests, and even identified the group’s leader.
On September 30, law enforcement kicked off Operation KillSwitch. It was led by German authorities, with assistance from numerous other agencies: Europol, Eurojust, as well as authorities from Belgium, Finland, Germany, Greece, the Netherlands, Romania, Spain, Switzerland, the United Kingdom, and the United States.
Private cybersecurity companies such as Group-IB also participated with vital intelligence, having labeled KillSec one of the most active ransomware groups in 2025 in Asia-Pacific, Latin America, and the Middle East.
Operation KillSwitch
KillSec emerged as a serious threat actor...
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