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Developer jailed for taking down employer’s network with kill switch malware

Posted on August 22, 2025 by Dissent

Iain Thomson reports an update to a case previously reported on this site:

A US court sentenced a former developer at power management biz Eaton to four years in prison after he installed malware on the company’s servers.

Davis Lu, 55, spent a dozen years at Eaton and rose to become a senior developer of emerging technology, before the company demoted him after restructuring. Lu unwisely responded to that setback by installing a “kill switch” that would activate if the company revoked his network access.

The package was a Java program that generated increasing numbers of non-terminating threads in an infinite loop that would eventually use enough resources to crash the server.

…   Lu labeled his malware IsDLEnabledinAD, for “Is Davis Lu enabled in Active Directory.” Furthermore, after developing the software he uploaded it using his corporate credentials – hardly clean OPSEC, to quote the US Defense Secretary.

Read more at The Register.


Related:

  • Software developer charged with damaging the computer system of a Cleveland company
  • Texas Man Convicted of Sabotaging his Employer’s Computer Systems and Deleting Data
Category: InsiderU.S.

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