Last year, I wrote about the potential for doxers to alter documents before they leaked them. It was a theoretical threat when I wrote it, but now Citizen Lab has documented this technique in the wild:
This report describes an extensive Russia-linked phishing and disinformation campaign. It provides evidence of how documents stolen from a prominent journalist and critic of Russia was tampered with and then “leaked” to achieve specific propaganda aims. We name this technique “tainted leaks.” The report illustrates how the twin strategies of phishing and tainted leaks are sometimes used in combination to infiltrate civil society targets, and to seed mistrust and disinformation. It also illustrates how domestic considerations, specifically concerns about regime security, can motivate espionage operations, particularly those targeting civil society.