North Korean workers have been infiltrating US companies, but extortion has emerged as a new tactic. Early into his four-month employment, he used remote-work tools to infiltrate the company's systems, downloading a large amount of company data, per Secureworks. Last year, FBI leaders warned that the money earned in salaries was being funneled to North Korean weapons programs. AdvertisementA Ukrainian man was also accused of operating "laptop farms" for North Korean workers. He told Business Insider that thorough vetting and background checks are often the "only fallback" to prevent rogue access to sensitive company data.

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Persons: —, Secureworks, Rafe Pilling, Pilling, Charles Carmakal, Carmakal, Jake Moore Organizations: North, Service, FBI, North Korean, Business, Counter, Unit, CTU, BBC News, Mandiant Consulting, Korean, Monitoring, Management, Fortune, Prosecutors Locations: North Korean, Secureworks, Korean, American, Australia, North Korea, Korea, Arizona