On 30 September 2026, law enforcement took control of KillSec’s leak site, securing at least 110 terabytes of data against further unauthorised access. The cybercrime group used the site to threaten organisations with the publication of stolen files unless they paid a ransom.
The action was part of Operation KillSwitch, an international investigation led by German authorities into around 1 000 suspected attacks worldwide. Investigators identified a 16-year-old as the group’s suspected main operator. Three suspects were provisionally arrested and eight properties searched in Greece, Romania, Spain, and the United Kingdom. Authorities also targeted the group’s criminal proceeds.
KillSec stole sensitive data by exploiting vulnerabilities and poorly secured access points to organisations’ systems. Around 500 of the suspected attacks have so far been identified as successful. This figure may change as investigators examine the evidence seized during the operation.
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Source: EUROPOL News
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