NEW YORK - The user on Gab who identifies as Nora Berka resurfaced in August after a year-long silence on the social media platform, reposting a handful of messages with sharply conservative political themes before writing a stream of original vitriol.

The posts mostly denigrated President Joe Biden and other prominent Democrats, sometimes obscenely. They also lamented the use of taxpayer dollars to support Ukraine in its war against invading Russian forces, depicting Ukraine’s president as a caricature straight out of Russian propaganda.

The fusion of political concerns was no coincidence.

The account was previously linked to the same secretive Russian agency that interfered in the 2016 presidential election and again in 2020, the Internet Research Agency in St Petersburg, according to the cyber-security group Recorded Future.

It is part of what the group and other researchers have identified as a new, though more narrowly targeted, Russian effort ahead of Tuesday’s United States midterm elections.

The goal, as before, is to stoke anger among conservative voters and to undermine trust in the American electoral system. This time, it also appears intended to undermine the Biden administration’s extensive military assistance to Ukraine.

“It’s clear they are trying to get them to cut off aid and money to Ukraine,” said Mr Alex Plitsas, a former army soldier and Pentagon information operations official now with Providence Consulting Group, a business technology company.

The campaign – using accounts that pose as enraged Americans like Nora Berka – have added fuel to the most divisive political and cultural issues in the country today. It has specifically targeted Democratic candidates in the most contested races, including the Senate seats up for grabs in Ohio, Arizona and Pennsylvania, calculating that a Republican majority in the Senate and the House of Representatives could help the Russian war effort.

The campaigns show not only how vulnerable the American political system remains to foreign manipulation but also how purveyors of disinformation have evolved and adapted to efforts by the major social media platforms to remove or play down false or deceptive content.

In October, the FBI and the Cybersecurity and Infrastructure Security Agency issued an alert warning of the threat of disinformation spread by “dark web media channels, online journals, messaging applications, spoofed websites, e-mails, text messages and fake online personas”. The disinformation could include claims that voting data or results had been hacked or compromised.

The agencies urged people not to like, discuss or share posts online from unknown or distrustful sources. They did not identify specific efforts, but social media platforms and researchers who track disinformation have recently uncovered a variety of campaigns by Russia, China and Iran.

Recorded Future and two other social media research companies, Graphika and Mandiant, found a number of Russian campaigns that have turned to Gab, Parler, Getter and other newer platforms that pride themselves on creating unmoderated spaces in the name of free speech.

These are much smaller campaigns than those in the 2016 election, where inauthentic accounts reached millions of voters across the political spectrum on Facebook and other major platforms. The efforts are no less pernicious, though, in reaching impressionable users who can help accomplish Russian objectives, researchers said.

“The audiences are much, much smaller than on your other traditional social media networks,” said Mr Brian Liston, a senior intelligence analyst with Recorded Future who identified the Nora Berka account. “But you can engage the audiences in much more targeted influence ops because those who are on these platforms are generally US conservatives who are maybe more accepting of conspiratorial claims.”

Many of the accounts the researchers identified were previously used by a news outlet calling itself the Newsroom for American and European Based Citizens.

Meta, the owner of Facebook and Instagram, has previously linked the news outlet to the Russian information campaigns centred around the Internet Research Agency.

The network appears to have since disbanded, and many of the social media accounts associated with it went dormant after being publicly identified around the 2020 election. The accounts started becoming active again in August and September, called to action like sleeper cells.

Nora Berka’s account on Gab has many of the characteristics of an inauthentic user, Mr Liston said. There is no profile picture or identifying biographical details. No one responded to a message sent to the account through Gab.

The account, with more than 8,000 followers, posts exclusively on political issues – not in just one state but across the country – and often spreads false or misleading posts. Most have little engagement but a recent post about the FBI received 43 responses and 11 replies, and was reposted 64 times.

Since September, the account has repeatedly shared links to a previously unknown website – electiontruth.net – that Recorded Future said was almost certainly linked to the Russian campaign.

Electiontruth.net’s earliest posts date only from Sept 5; since then, it has posted articles almost daily ridiculing Mr Biden and prominent Democratic candidates, while criticising policies regarding race, crime and gender that it said were destroying the United States. “America under Communism” was one typical headline.

A recurring theme of the new Russian efforts is an argument that the United States under Mr Biden is wasting money by supporting Ukraine in its resistance to the Russian invasion that began in February.

“As working-class Americans struggle to afford food, gas, and find baby formula, Joe Biden wants to spend US$13.7 billion (S$19.3 billion) more in aid to Ukraine,” the Nora Berka account posted. Not incidentally, that post echoed a theme that has gained some traction among Republican lawmakers and voters who have questioned the delivery of weapons and other military assistance.

“It’s no secret that Republicans – that a large portion of Republicans – have questioned whether we should be supporting what has been referred to as foreign adventures or somebody else’s conflict,” said Mr Graham Brookie, senior director of the Digital Forensics Lab at the Atlantic Council, which has also been tracking foreign influence operations. NYTIMES