Guccifer 2.0, widely believed to be an alias fronting for hackers tied to the Russian government, apparently altered at least one document stolen from the Democratic National Committee (DNC), adding the designation “confidential” to the email. 

The modification was just one part of a more sophisticated initiative by Russia to disrupt the 2016 presidential campaign, poisoning the waters for Hillary Clinton, according to a report by the Associated Press and based on data released by SecureWorks. 

The altered missive came from Campaign Chairman John Podesta's email. Podesta was netted in a phishing campaign that initially attempted to lure 29 people associated with Clinton during her first presidential campaign.