It is very unusual for FLARE to analyze a prolifically-used, privately-developed backdoor only to later have the source code and operator tools fall into our laps. Yet this is the extraordinary circumstance that sets the stage for CARBANAK Week, a four-part blog series that commences with this post.

https://www.fireeye.com/blog/threat-research/2019/04/carbanak-week-part-one-a-rare-occurrence.html