I mentioned Cambridge Analytica just because the exposé provided a timely primer in disinformation.
If you wanted to know specifically about Russian disinformation campaigns, there's quite a lot been written about troll factories such as the Internet Research Agency in St Petersburg.
Eg:
www.theguardian.com/world/2015/apr/02/putin-kremlin-inside-russian-troll-house
www.telegraph.co.uk/news/2017/10/20/inside-russian-troll-factory-reached-millions-us-voters-inflammatory/
Up-to-date trackers include:
• The Hamilton 68 Dashboard. Activity from 600 monitored Twitter accounts linked to Russian influence operations.
dashboard.securingdemocracy.org
• EU vs Disinfo. EU project to forecast and respond to pro-Kremlin disinformation.
Eg Skripal and the disinformation swamp
Pro-Kremlin outlets went into overdrive in response to British Prime Minister Theresa May’s statement blaming Moscow for the poisoning and attempted murder of former Russian spy Skripal on British soil.
[...]
What was striking was how the stories – some appearing on the same state-controlled news outlet but completely contradicting one another – peddled multiple, unsubstantiated and often absurd conspiracy theories. This is perhaps the most classic of pro-Kremlin disinformation techniques: to confuse the wider audience and at the same time to feed a loyal audience of disinformers ready to defend Russia with abundant lines to take. The resemblance is very clear to previous instances when Russia was identified as the perpetrator of a crime: for example the MH17-case and the bombing of the humanitarian convoy in Syria.
In both instances, pro-Kremlin disinformation was quick to dismiss, distort, distract and dismay.
It was no surprise, then, that “Russophobia” was one of the top explanations given by Russian state-controlled TV in the Skripal case. This is one of the most common of responses to any accusation levelled against Russia.