Pentagon employs private contractors for that, like General Dynamics IT. Maybe CIA does that too.
"By 2010, the military began using social media tools, leveraging phony accounts to spread messages of sympathetic local voices – themselves often secretly paid by the United States government. As time passed, a growing web of military and intelligence contractors built online news websites to pump U.S.-approved narratives into foreign countries. Today, the military employs a sprawling ecosystem of social media influencers, front groups and covertly placed digital advertisements to influence overseas audiences, according to current and former military officials.
...
Nevertheless, the Pentagon’s clandestine propaganda efforts are set to continue. In an unclassified strategy document last year, top Pentagon generals wrote that the U.S. military could undermine adversaries such as China and Russia using “disinformation spread across social media, false narratives disguised as news, and similar subversive activities [to] weaken societal trust by undermining the foundations of government.”
And in February, the contractor that worked on the anti-vax campaign – General Dynamics IT – won a $493 million contract. Its mission: to continue providing clandestine influence services for the military."[0]
"By 2010, the military began using social media tools, leveraging phony accounts to spread messages of sympathetic local voices – themselves often secretly paid by the United States government. As time passed, a growing web of military and intelligence contractors built online news websites to pump U.S.-approved narratives into foreign countries. Today, the military employs a sprawling ecosystem of social media influencers, front groups and covertly placed digital advertisements to influence overseas audiences, according to current and former military officials.
...
Nevertheless, the Pentagon’s clandestine propaganda efforts are set to continue. In an unclassified strategy document last year, top Pentagon generals wrote that the U.S. military could undermine adversaries such as China and Russia using “disinformation spread across social media, false narratives disguised as news, and similar subversive activities [to] weaken societal trust by undermining the foundations of government.”
And in February, the contractor that worked on the anti-vax campaign – General Dynamics IT – won a $493 million contract. Its mission: to continue providing clandestine influence services for the military."[0]
[0] https://www.reuters.com/investigates/special-report/usa-covi...