Which social engineering attack was in the case:
A man receives a text message on his phone purporting to be from Technical Services. The text advises of a security breach and provides a web link and phone number to follow up on. He turns over sensitive information when the man calls the number.
The use of text messages to socially engineer mobile device users is referred to as smishing. It is, by definition, a mobile-based social engineering attack. Aside than that, it sounds like something a five-year-old might say after killing a bug.