A security analyst notices a particular account attempting to transfer large amounts of money on a web server. Which of the following types of attack is MOST likely being conducted?

The scenario describes an account attempting to transfer large amounts of money, which strongly suggests unauthorized actions are being taken, possibly by an attacker trying to exploit the session of a legitimate user. The most likely attack being conducted in this scenario is a session replay attack.

In a session replay attack, a malicious actor captures a user's session data, such as session tokens or cookies, and later reuses that data to impersonate the user during their session. This can lead to unauthorized transactions or actions, such as transferring money without the user's consent. Since the anomaly involves transferring large amounts of money, it aligns well with the characteristics of a session replay attack.

Other options represent different types of attacks:

• SQL injection (SQLi) involves injecting malicious SQL queries into input fields to manipulate databases, which may not directly pertain to the money transfer context.

• Cross-site request forgery (CSRF) is an attack tricking a user into submitting an unwanted action, but typically relies on the user's active session rather than replaying it.

• API attacks generally target application programming interfaces in a wider context, and while they could also involve unauthorized transactions, the specific situation presented—focusing on session data—fits best with session replay.

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