A North Korean hacker posing as a US-based IT professional applied to infiltrate US cyber security company KnowBe4, but was discovered before successfully gaining access to the company's intranet. The company discovered that the newly hired senior software engineer was actually a North Korean state-level hacker who attempted to hack into the security awareness training company's systems. The fake IT employee had successfully passed background checks and multiple rounds of interviews before joining KnowBe4's internal AI team.