Deripaska helped Comey try to get a hostage back from Iran IIRC.
Deripaska is not a friend of Soros, and Soros has used the power of US law enforcement against his enemies in Ukraine before including Manafort.
This is Soros using the FBI has his personal goon squad to protect his interests. since Durham threatens to expose it all.
This is happening for the same reason Steele has been trotted out by the DNC media to try to give his bogus dossier some legitimacy in advance of Durham making a wider case about how the Russia hoax started.
Def notable.