Well now.

Who do we look to for purveyors of viruses and other mafia scams?
Where is the will, the poverty to drive it and the expertise honed over the last couple of decades? A ready pool of recruits?

Nigeria? Doubt it.
Maldova - clue in the name there, how connected are they to Russia?
India - but why?
China - only if it can help their economy, which is not as boyant as the context they have come to rely on.
Pakistan - Taliban? Only if paid from Moscow.
IS - well they have motivation and some form on social media. Cheaper than guns, and less painful. But help a capitalist warmonger?
Niggle Farage - whatever he has up his (whatever) would be a love token to Trump.

Could be a number of groups, could be more than one. But top of the list is the Putinista.