The hacker responsible for the $300 million theft from Coinbase has been actively moving Ethereum through Tornado Cash, a privacy-focused cryptocurrency mixer. The hacker's wallet has received 5,514 ETH, valued at approximately $24.04 million, and is gradually withdrawing the funds. The wallet address involved in these transactions is 0x9b01b0545afe5b9957efc7945253e19b2ba07d9c.