【資料】
◆SILVERTERRIER: THE RISE OF NIGERIAN BUSINESS EMAIL COMPROMISE (UNIT42(Paloalto), 2016)
https://www.paloaltonetworks.com/apps/pan/public/downloadResource?pagePath=/content/pan/en_US/resources/whitepapers/unit42-silverterrier-rise-of-nigerian-business-email-compromise