@ChristinaLekati Two details stand out to me:

• They "looked nothing like a North Korean." That's pretty remarkable if true, because for anyone who's worked with North Koreans it's very easy to spot them from a mile away.
• If they attended multiple major crypto conferences, I'd love to know where those where. Outside of China and South East Asia, visas for North Koreans are not easy to come by.

Fascinating breach, nonetheless.

@nils I found these points interesting too. It appears that the individuals were hired proxies from a different nationality. It wouldn't be the first time this happens