Though the social media accounts were using familiar tactics — spreading inflammatory memes in an effort to "sow discord" — the IRA went to new lengths to disguise its involvement. Rather than operating the accounts out of Moscow, as they did in 2016, the accounts were run by groups in Ghana and Nigeria, according to the companies.

"They frequently posted about US news and attempted to grow their audience by focusing on topics like black history, black excellence and fashion, celebrity gossip, news and events related to famous Americans like historical figures and celebrities, and LGBTQ issues," Facebook's Head of Security Policy, Nathaniel Gleicher, wrote in a statement.

"This activity did not appear to focus on elections, or promote or denigrate political candidates. They also shared content about oppression and injustice, including police brutality. Although the people behind this activity attempted to conceal their purpose and coordination, our investigation found links to EBLA, an NGO in Ghana, and individuals associated with past activity by the Russian Internet Research Agency (IRA)."

As with the IRA's 2016 disinformation campaign, the trolls gained a significant foothold on Instagram, where the accounts in questions had amassed close to 265,000 followers. On Facebook, they had nearly 13,500 followers, according to the company. A Senate Intelligence Committee report released last year noted that Instagram "was the most effective tool used by the IRA to conduct its information operations campaign." On Twitter, the 71 IRA-linked accounts had more than 68,000 followers, CNN reported.

The use of individuals in Ghana and Nigeria — some of whom, Facebook notes, may not have known of their Russian backers — shows how the IRA is attempting to evolve their tactics ahead of the 2020 presidential election. Researchers have long warned that trolls will likely find new ways to meddle as social media companies attempt to keep up.