"It looked like a step back," Ben Nimmo, one of the Californian group's security managers, told AFP.

"But they haven't been very good and there's no evidence that they got the impact and virality they had before."

Meta has dismantled a network of fake accounts on its platforms, created by an entity dubbed "Cyber ​​Front Z" and people associated in the past with the "Internet Research Agency" (IRA), suspected of being a digital arm of the Kremlin.

These fake accounts, run by employees of a "troll farm" located in St. Petersburg, posted pro-Russia comments under personalities and media content, to "give the impression of popular support to the invasion of Ukraine".

"Russia is sending tons of humanitarian aid to Ukraine, where the local Nazis (...) are holding the citizens hostage", commented one of these accounts under a video posted by Angelina Jolie on the war, on Instagram , according to the Meta report.

In all, the social media giant withdrew more than 1,000 accounts on Instagram and 45 on Facebook in early April.

Some 49,000 accounts followed one or more of the fake profiles on Instagram.

In 2016, the American presidential campaign was marked by massive influence operations carried out by the IRA in favor of Donald Trump.

But unlike other past campaigns, Cyber ​​Front Z didn't really try to hide, on the contrary.

"There was no iceberg hidden below," noted Ben Nimmo.

"It was an attempt to hack (the public's) perception, playing on our fears, playing on the impression that these operations are effective."

"They had this weird channel on Twitter that said + we hacked your elections, we overthrew the Americans, your democracy is in our pocket +", related the official.

A Russian media outlet, Fontanka, revealed in March that a "troll farm" was recruiting, among other things, "spammers" and "commentators" to post on platforms like YouTube and TikTok, and others in Russia.

On Telegram messaging, a public channel called on its subscribers to flood certain accounts of public figures or news sites with pro-Russian comments.

But the operation “was largely clumsy and ineffective,” the report notes.

"On Instagram, more than half of fake accounts were detected and deactivated by our automatic systems right after they were created."

© 2022 AFP