This rule addresses the detection of callback scams that use the legitimate WeTransfer noreply email address to deceive users. It leverages natural language processing (NLP) techniques, specifically a machine learning model (ml.nlu_classifier), to analyze the content of messages and identify intent related to callback scams. This rule operates by first checking if the email's source matches the WeTransfer noreply address. Following this, the rule utilizes an NLP classifier on the body of the message to identify high-confidence indicators of a callback scam. The rule falls under the category of medium severity and is primarily designed to protect users from social engineering tactics where attackers impersonate legitimate services to extract sensitive information through fraudulent callbacks.