On October 23, the whistleblowing site warned Benenson via its Twitter account that it has prepared a "surprise" for him.
On ABC's "This Week" on the same day, Benenson claimed that many of the emails published on WikiLeaks were "not authentic" and repeated Clinton supporters' favorite tale of Russians being behind the hacks. He neither specified which emails were not "authentic" nor provided any proof of that Russia is "meddling in US elections."
The warning by WikiLeaks comes after the whisteblowing website also put on notice vice presidential nominee Tim Kaine and Democratic National Committee head Donna Brazile on October 21, using the same "surprise" language.
The site repeated a threat to leak information on Tim Kaine in a Sunday tweet that also addressed NBC's "Meet the Press."
In an interview with the Associated Press on Saturday, Kaine commented on WikiLeaks' taunts, saying that he is a "regular human being" who has nothing to be "overly embarrassed about."
Wikileaks is mired in its own bad news, notably the decision by the Ecuadorian embassy in London to shut off internet access to Julian Assange, as well as the death of Wikileaks mentor Gavin MacFadyen on Saturday.