http://www.fireeye.com/blog/threat-research/2016/03/citrix_xenapp_andxe.html
T02 FireEye Threat Research 03/15/2016
https://krebsonsecurity.com/2020/10/fbi-dhs-hhs-warn-of-imminent-credible-ransomware-threat-against-u-s-hospitals/
T04 Krebs on Security 10/28/2020