Telemetry data collected by Microsoft Malware Protection Center (MMPC) indicates this campaign primarily targeted German-language speakers and banking websites. The spam emails are difficult for email servers to filter because the spamming component uses compromised email accounts to send malicious links. This means traditional anti-spam techniques, such as callback verification, won’t be applicable because the email is sent from a vetted or legitimate email address.
Read more here – http://blogs.technet.com/b/mmpc/archive/2015/01/06/emotet-spam-campaign-targets-banking-credentials.aspx