His name appears in public records as general director of Azimut — which, according to the indictment, was used to funnel money to the troll farm — and of the Reputation Management Center. According to its website, the Reputation Management Center first determines what kind of reputation a client has online through media monitoring, and then creates bots that improve its image through positive posts, “drowns negative reviews in a sea of favorable information about the company” and “creates hype” around it.

The Others: Irina V. Kaverzina, Vadim V. Podkopaev, Gleb I. Vasilchenko, Vladimir Venkov

Ms. Kaverzina grew worried after Facebook revealed last September that it was cooperating with the authorities to look into Russian advertising on the platform. “We had a slight crisis here at work: the F.B.I. busted our activity (not a joke),” she wrote to a relative, according to the indictment. “So, I got preoccupied with covering tracks together with the colleagues,” she added. “I created all these pictures and posts, and the Americans believed that it was written by their people.”

Mr. Podkopaev was an analyst for the “translator project.” He conducted research on the United States and drafted social media messages for the organization, according to the indictment.

Mr. Vasilchenko posted to, monitored and updated social media accounts while posing as Americans or as American grass-roots organizations. He led two subgroups focused on political interference in the United States, including the election. On Vkontakte, he shared a meme in October 2016 that imagined a drinking game in which players took a shot every time Mr. Trump talked about building a wall along the Mexican-United States border or making America great again, told voters to believe him, or complained about being treated unfairly; and every time Mrs. Clinton coughed, sipped water, laughed awkwardly, or mentioned her daughter or President Barack Obama.

Mr. Venkov inhabited multiple social media personas, according to the indictment. Someone with that name belongs to a Facebook group of social media marketing professionals and posted a photo last May of himself wearing a Republican elephant pin.