Hello and welcome to the MetaMask community.
Around 7 hours ago, 556.49 BUSD was sent to the following address. 0x639bc2c3df9a1011f065fdd8073aec6edbf5bfa0
Since you mentioned you do not recognize the address, unfortunately, it is likely that your wallet has been compromised. Please refer to the following link: Do you think your wallet has been hacked? - READ HERE