This is a frightening 8-part series about the abuse of "Pegasus" in Mexico 2017-2019: https://citizenlab.ca/2017/02/bittersweet-nso-mexico-spyware...
Here's a category of articles on the citizenlab.ca web site described as "Investigations into the prevalence and impact of digital espionage operations against civil society groups": https://citizenlab.ca/category/research/targeted-threats/