There is no evidence that WikiLeaks has anything to do with Russia. None whatsoever. Whenever I've asked people why they think this, they give two reasons:
1 - WikiLeaks hasn't published leaks about the Russian government.
2 - Assange did some TV interviews on RT years ago.
These are both laughable. Assange himself gave the obvious explanation for (1) - they haven't done that because they didn't receive any. And it's equally obvious why not: WikiLeaks arose to handle leaks of material that the western press were refusing to publish for unsatisfying reasons, like the Iraq war stuff. But the western press would salivate at the opportunity to publish damaging leaks about the Russian government, assuming the original holder wanted the info to appear in the west and not in, say, Russian. So why would anyone with such material care about Wikileaks? There is no reason for them to do so.
Regardless, attempting to divine intent from things that have not happened is hardly a good standard of evidence to use when making serious accusations.
As for the TV interviews, well, RT is a large scale news channel that has interviewed tons of different people over the years. Appearing on a TV channel is hardly evidence of working for the related national government. Otherwise everyone who appears on the BBC works for the British government, anyone who appears on Al Jazeera is in the pocket of Qatar and so on.