An accounting clerk sent money to an attacker's bank account after receiving fraudulent instructions to use a new account. Which of the following would most likely prevent this activity in the future?

Updating processes for sending wire transfers is the most direct and effective solution. This addresses the root cause of the incident by introducing controls like multi-factor authentication for financial transactions, requiring verbal confirmation for new account details, or implementing a separation of duties for approving transfers. Standardizing security incident reporting is important for tracking and analysis but won't prevent the initial fraudulent transfer. Executing regular phishing campaigns helps raise awareness but doesn't directly prevent a determined attacker who has already tricked an employee. Implementing insider threat detection measures focuses on malicious actions by internal employees, whereas this scenario describes an external attacker manipulating an employee.