PANews reported on October 9 that according to Yonhap News Agency, the data submitted by Dunamu, the operator of the South Korean cryptocurrency exchange Upbit, to the Science, Technology, Information, Broadcasting and Communications Committee of the South Korean National Assembly showed that Upbit suffered a total of 159,061 network attack attempts in the first half of this year, 2.17 times the number of attack attempts in the same period last year. The number of hacker attack attempts on Upbit increased from 8,356 in the second half of 2020 to 34,687 in the first half of 2021, 63,912 in the second half of 2021, 73,249 in the first half of 2022, and 87,242 in the second half of 2022. In fact, Upbit suffered a loss of about 58 billion won (about 43 million US dollars) due to hacker attacks in 2019.

Dunamu said that in order to enhance security, cold wallets control more than 70% of asset management, and hot wallets implement multi-structure decentralized operations; since the hacker attack in 2019, there has not been an actual cyber attack.