They state that STRONTIUM is likely APT28/Sofacy in linked PDF:
"STRONTIUM has been active since at least 2007. Whereas most modern untargeted malware is ultimately profit-oriented, STRONTIUM mainly seeks sensitive information. Its primary institutional targets have included government bodies, diplomatic institutions, and military forces and installations in NATO member states and certain Eastern European countries. Additional targets have included journalists, political advisors, and organizations associated with political activism in central Asia. STRONTIUM is Microsoft’s code name for this group, following its internal practice of assigning chemical element names to activity groups; other researchers have used code names such as APT28, Sednit, Sofacy, and Fancy Bear as labels for a group or groups that have displayed activity similar to the activity observed from STRONTIUM. The group’s persistent use of spear phishing tactics and access to previously undiscovered zero-day exploits have made it a highly resilient threat."
"STRONTIUM has been active since at least 2007. Whereas most modern untargeted malware is ultimately profit-oriented, STRONTIUM mainly seeks sensitive information. Its primary institutional targets have included government bodies, diplomatic institutions, and military forces and installations in NATO member states and certain Eastern European countries. Additional targets have included journalists, political advisors, and organizations associated with political activism in central Asia. STRONTIUM is Microsoft’s code name for this group, following its internal practice of assigning chemical element names to activity groups; other researchers have used code names such as APT28, Sednit, Sofacy, and Fancy Bear as labels for a group or groups that have displayed activity similar to the activity observed from STRONTIUM. The group’s persistent use of spear phishing tactics and access to previously undiscovered zero-day exploits have made it a highly resilient threat."
http://download.microsoft.com/download/4/4/C/44CDEF0E-7924-4...