What do you call a hacker who reroutes them to the hackers server?

A hacker who reroutes users to their own server is often referred to as a "man-in-the-middle" (MitM) attacker. This type of attack involves intercepting communication between two parties, allowing the hacker to eavesdrop, modify, or redirect data. In some cases, this may also be referred to as a "phishing" attack if it involves tricking users into providing sensitive information.