Can someone smart explain to me what happened during the chapter and that file😆

They hacked and stole a whole bunch of money from gov officials (or maybe adjacent). This set of a bunch of alarm bells in the NIS because the hacker uses the same technique as North Korea (cause she's a defector) and they usually sign off their hacks with the same name but this time it's signed Kim Hyun (her husband's name). The guy whose getting asked to fix this is her Husband's friend whose also in the NIS and hes been monitoring her so he knows she gone off her rocker after he left. So when he heard it was signed Kim Hyun he's like "there's no freaking way"