Bоb, а C-level executive аt а large cоmpany, receives an urgent-lоoking email that appears to be from the CFO, requesting a wire transfer to a new vendor to avoid delaying a critical shipment. Alice explains that this kind of attack targets high-ranking executives by using highly personalized, deceptive messages designed to trick them into revealing sensitive information or transferring funds—what type of cyberattack is this?