According to DOJ [1], "Someone" is Fancy Bear [2] and the FBI has seized control [3] of the C&C domain (ToKnowAll.com)
[1] https://www.justice.gov/opa/pr/justice-department-announces-...
[2] https://en.wikipedia.org/wiki/Fancy_Bear
[3] https://www.engadget.com/2018/05/24/fbi-seizes-domain-russia...