Mask Network founder Suji Yan posted that today is his birthday, about three hours ago a public wallet carried on his phone was hacked and more than $4 million in assets were stolen. All the stolen transactions appear to have been manual and lasted more than 11 minutes. So either the private key was leaked on his birthday or it could have been an offline attack. Suji Yan said that he was at a private party with more than a dozen friends at the time, and when he went to the bathroom to wait, his phone was left for a few minutes, but he believed his friends that this was a nightmare for anyone. Slow Mist and ZachXBT have been contacted to assist in the investigation.