Upbit hacker wallet address transfers 11001 Ethereum to unknown wallet address

According to Whale Alert monitoring, at 15:46:59 Beijing time, the Upbit hacker wallet address (beginning with 0x4d53dad4b) was transferred 1001 ETH (worth 148911 USD) to an unknown wallet address beginning with 0x519a3b21. At 15:52:48 Beijing time, the Upbit hacker wallet address transferred 10,000 ETH (worth 1,490,311 dollars) to the unknown wallet address.