Recent research by Berk Albayrak and Utku Corbaci, the team members of Malwation Threat Research (MTR) team has focused on BEC attacks targeting the company's employees. You can find the white paper from their findings in this post.
Free Online Library: Authors Gul Afshan, Ahmed Usaid Qureshi, Syed Najam Haider, Tehmina Kazmi, Uzma Kazmi and Masood Sadiq to Gumz, Jonathan; Fettermann, Diego Castro; Frazzon, Enzo Morosini; Kück, Mirko