· · · · ·

Russian Interference in Brazil’s Vote: Confirmed, Reported, Rumored

Brazil votes in a runoff on Oct. 25. Here is what officials, OpenAI and reporters have confirmed about Russian influence, and what is still unverified rumor.

ByPeter Peters
Curved glass facade of the Superior Electoral Court headquarters in Brasília under a clear blue sky
Headquarters of Brazil's Superior Electoral Court (TSE) in Brasília, designed by Oscar Niemeyer, photographed Dec. 26, 2025. Photo by Luiz Roberto/TSE (public domain), via Wikimedia Commons.

Brazil’s presidential race goes to a runoff on October 25, 2026, after Senator Flávio Bolsonaro took 47.03% of valid votes and President Luiz Inácio Lula da Silva 45.16% in the October 4 first round.12 Rumors say Russian intelligence operatives have been working inside Brazil for months, in growing numbers. This report separates what officials have confirmed, what credible outlets have reported on partial or anonymous sourcing, and what remains unverified. As of October 10, Peter’s World found no official statement and no named outlet that supports the rumor about operatives.

Key takeaways

  1. Brazil’s electoral court says it has found no concrete sign of foreign interference. TSE president Kassio Nunes Marques said on October 4 that “until now, we have no concrete indication of international interference” and that nothing had appeared in the court’s own rooms or teams.34
  2. One credible report points the other way, without detail. Reuters, citing a report of meetings compiled by an attendee, wrote that officials from Abin, Brazil’s intelligence agency, told French and German officials in September that they had “confirmed the existence of interference from the United States as well as Russia.” They gave no details about the Russian part.5
  3. The strongest new Russia-linked item is a company takedown, not a government finding. On October 8, OpenAI said it banned a Russia-origin cluster that ran a Latin America “think tank” front. It said the cluster focused mostly on Ukraine’s image and on Argentina and Bolivia. It did not describe a campaign aimed at Brazil’s election.6
  4. The rumor about operatives is unconfirmed. No official statement or named outlet we found says Russian intelligence personnel are in Brazil in rising numbers because of this election. The closest documented case is the “illegals” affair, in which Brazilian police exposed alleged Russian officers who used Brazilian identities. BBC News Brasil, relaying Brazilian police findings, wrote that none of the identified suspects was collecting information on Brazil.7
  5. The same Abin account also names the United States, and a Brazilian government request to police concerned alleged U.S. funding, not Russia. Interference claims in this race run in several directions and should be weighed with that in mind.58

What is confirmed, what is reported, what is rumor

Tiers follow one rule: “confirmed” means an official or primary source said it on the record. “Reported” means a credible outlet reported it using documents, a second-hand account or anonymous sources. “Unverified rumor” means no named source we could find.

Confirmed on the record

  • Runoff date October 25; first-round result 47.03% to 45.16% (TSE).1
  • TSE president: no concrete indication of international interference as of October 4.3
  • PF director Andrei Rodrigues: a preliminary inquiry into foreign interference was under way, with no formal police inquiry opened.8
  • OpenAI banned a Russia-origin influence cluster on October 8 and said it shared the case with authorities.6
  • A Brazilian court convicted Sergey Cherkasov of using false documents; the government has ordered his expulsion after his sentence.7

Reported by credible outlets

  • Abin officials told French and German delegates they “confirmed” Russian and U.S. interference, with no Russian detail (Reuters, from an attendee’s report; Abin did not comment).5
  • An anonymous senior Brazilian cyber official said cyberattacks nearly doubled from 2025 and called phishing against the president’s office “election-related.” No attacker was named.5
  • ARD’s Tagesschau linked Brazil’s Nova Resistência to the Russian Storm-1516 network; its leader did not answer NDR’s request for comment.910
  • At least nine alleged Russian officers held Brazilian identities (New York Times, Estadão; confirmed to BBC News Brasil).117

Unverified rumor

  • Claim: Russian intelligence operatives have been in Brazil for months, in increasing numbers, in connection with the election.
  • Source: none named. No official, agency or outlet we found says this.
  • What cuts against it: the TSE statement, and the finding that the 2022–25 case involved identity laundering for work abroad.
  • What does not settle it: intelligence work is secret, so absence of public evidence is not proof of absence.

Timeline: Russian influence activity touching Brazil

Each entry is attributed to the party that made the claim. Dates come from the cited reports.

  1. Apr. 2022
    Sergey Cherkasov, who presented himself as Brazilian Victor Muller Ferreira, was detained in Amsterdam and sent back to Brazil. Dutch, U.S. and Brazilian investigators say he was an agent of Russia’s military intelligence service, the GRU; he denies being a spy.7
  2. 2022
    Brazil’s election-integrity disinformation was driven mainly by domestic networks around supporters of Jair Bolsonaro, according to a Mozilla Foundation study of WhatsApp and Telegram data from the UFRJ lab NetLab.12
  3. Oct. 19, 2023
    The State Department’s Global Engagement Center described Nova Resistência as part of a pro-Kremlin “Syncretic Disinformation Network,” and said its website was registered in Moscow.13
  4. Nov. 7, 2023
    The State Department said Russia financed a Latin America-wide campaign that named Brazil among its targets and used the firms Social Design Agency and Structura.14
  5. 2025
    The New York Times reported that Brazilian police had identified at least nine alleged Russian officers who used Brazilian identities. Estadão carried the report, and BBC News Brasil said it confirmed the information at the time.117
  6. Jan.–Feb. 2026
    Nova Resistência published a story saying Germany’s chancellor would fund a €1.4 billion stadium in Belém. German officials told public broadcaster NDR the claim was invented, and Tagesschau linked the group to Storm-1516.910
  7. May 20, 2026
    Nunes Marques said a deepfake released the day before the runoff could reach millions before a court could rule. TSE rules bar new AI-generated or altered content in the 72 hours before voting days and the 24 hours after.15
  8. July 6, 2026
    Brazil published a decision to expel Cherkasov after his sentence ends, according to BBC News Brasil. The State Department said it was “deeply concerned.”7
  9. Sept. 9–11, 2026
    A French and German delegation visited Brasília, where Abin officials reportedly described U.S. and Russian interference.5
  10. Oct. 1–4, 2026
    Brazil’s solicitor general asked police to investigate alleged U.S. funding of groups acting against the Supreme Court. The U.S. closed its Brazilian embassy and consulates on October 2, and police searches found no concrete plan against them. Nunes Marques said October 4 there was no concrete sign of foreign interference.8316
  11. Oct. 7, 2026
    Police archived the solicitor general’s request because the intelligence directorate saw too little to open a formal inquiry, Folha reported and Valor confirmed.8
  12. Oct. 8, 2026
    OpenAI published its report on the Russia-origin “Dark Clark” operation and an Iranian one.6
  13. Oct. 25, 2026
    Runoff between Flávio Bolsonaro and Lula.

The OpenAI takedown: what it says about Brazil

OpenAI said the Russia-origin accounts used ChatGPT to write internal reports and some content for campaigns across Latin America. It said much of the activity aimed to undermine Ukraine’s reputation, and that some appeared aimed at local politics, “especially in Argentina and Bolivia.” OpenAI ran the operation as “Dark Clark,” after a persona called “Mia Clark” that the operators used to manage a self-described research platform, the Social Research Center.6

Brazil appears in three ways in the report. The center published work that included a comparison of the Brazilian economy under Bolsonaro and Lula. The operators claimed to have spread a January fake about a Brazilian influencer, which OpenAI could not corroborate. And the operators tried to take credit for a Brazilian news report about a Brazilian captured in Ukraine, which OpenAI said in fact quoted the captive’s own video.6 OpenAI said the center’s staff on the ground in Latin America appeared not to know they worked for a Russian group, and that the operators’ claims of impact cannot be taken at face value.

A Brazilian newsletter, A Investigação, read the center’s Brazil articles and described one as favorable to Lula. It also reported a part-time press-relations job posting for residents of Brazil, Portugal or Spain, at US$1,000 a month. That reporting is a single, small outlet and Peter’s World could not independently check the posting.17 The Brazil-focused article described so far was characterized as favorable to Lula, and OpenAI did not call the operation an attempt to decide the vote.

How Russian influence operations work in this region

The documented methods differ, and none has yet been tied in public to a specific operation against this runoff. They fall into five patterns.

  • Laundering through local media. The State Department said in 2023 that Russia-based firms planned for content made in Russia to be “localized” by Latin American staff and published in regional outlets.14
  • Fake sites and paid influencers. Tagesschau described Storm-1516 as a network of influencers and think tanks that spreads false stories through fake sites imitating established media, which influencers then promote on X.9
  • Automated news portals. DFRLab found the “Pravda” network of several hundred reposting portals had grown to 140 subdomains across more than 83 countries and regions by early 2025. Its sites repost content without original reporting.18 We did not find a published finding of a Brazil-specific Pravda site for this election.
  • AI-assisted false fronts, fake leaks and fake audio. OpenAI described fake email addresses used to trick schools, fake audio clips, forged letters and a front think tank staffed by unwitting locals.6
  • Identity laundering by officers. The Brazilian “illegals” case relied on authentic Brazilian birth certificates, which a registry official and an intelligence source said were genuine, to build passports and other documents.7

Two base rates matter. The 2022 Brazilian integrity-disinformation drive was mostly homegrown, per the Mozilla study.12 And in Armenia, where ISD counted more than 30 Storm-1516 campaigns between April 2025 and April 2026, the pro-EU governing party still won with 49.81% of the vote in preliminary results; Control Risks judged that such campaigns do not appear to have significantly changed results.19

What Brazil’s authorities and platforms are doing

  • TSE monitoring. The court’s disinformation alert system logged 453 alerts by 1 p.m. on October 4 and about 2,800 since August 16. Nunes Marques said no deepfake involving the presidential candidates had gained relevance.4 He also reported 2,604 integrity-related complaints from August 1 to the eve of the vote, against 18,487 in the same period of 2022, a fall of about 86%.20
  • Platform agreements. Nunes Marques credited a compliance plan and partnerships with platforms for removing many expected problems, and said the court had no sign of foreign interference in its own operations.3
  • AI rules. New AI-generated or altered content is barred from 72 hours before voting until 24 hours after.15
  • Police and intelligence. The Federal Police opened and then archived a preliminary review of a foreign-interference request, and Abin did not respond to Reuters’ request for comment.85
  • European cooperation. France’s Viginum and Arcom, and Germany’s Federal Network Agency, took part in a September visit that included “preparing coordinated responses ahead of the 2026 elections.”5

What to watch before the October 25 runoff

  • Any on-the-record Abin or Federal Police statement. Until one appears, the Reuters account of the Abin briefing remains second-hand.
  • The AI-content ban window. Counting 72 hours back from October 25, it opens around October 22 (Peter’s World calculation). Deepfakes released just before that window are the scenario Nunes Marques named.
  • Further platform or company disclosures. OpenAI’s report followed earlier company takedown reports; further ones may name Brazil directly. None did as of October 10.
  • TSE alert counts for the runoff, which offer a like-for-like comparison with the first round.
  • Cherkasov’s expulsion, which Brazil tied to the end of his sentence, so no date is set.

Analysis: what the evidence supports

This section is Peter’s World analysis based on the sources cited above. Forecasts are judgments, not facts.

Analysis

The public record supports three statements. First, Russian-linked influence networks are active in Latin America, and Brazil has been named in official U.S. statements and in German and OpenAI reporting. Second, nothing public yet ties a specific Russian operation to this election. Third, the two official Brazilian positions on record, Abin’s reported “confirmed” and the TSE president’s “no concrete indication,” are not identical, and neither comes with evidence the public can check.

One reading is that the two statements describe different things: Abin speaks about the broad information environment, while the TSE speaks about the court’s own systems and the vote. That is a judgment, since neither institution has explained the gap. A second caution is that Abin’s reported remark named the United States alongside Russia, and the government request to police that officials have discussed publicly concerned alleged U.S. funding. Interference claims in this race involve more than one foreign government, which is a reason to judge each claim on its own evidence.

On the rumor, the evidence is thin in both directions. The “illegals” case shows Russian officers did live in Brazil under assumed identities, and one plausible explanation for the rumor is that this older story is being read as current election activity. That is a judgment about where the rumor may come from, not a finding. Counterintelligence activity is secret by design, so a lack of public evidence cannot rule it out. Until an official or a primary document says otherwise, the claim about growing numbers belongs in the “unverified” tier. Peter’s World would revise this assessment only on an on-the-record statement from the Federal Police, Abin or the government.

Frequently asked questions

When is Brazil’s runoff election?

The runoff is on Sunday, October 25, 2026. The first round was held on October 4, when no candidate passed 50% of valid votes.1

Has Russia been proven to interfere in Brazil’s 2026 election?

No public official finding says so. Abin officials were reported to have told European officials that interference from Russia and the United States was confirmed, but they gave no details, and the TSE president said on October 4 there was no concrete indication of international interference.53

Are Russian intelligence operatives in Brazil?

Brazilian police exposed at least nine alleged Russian officers who used Brazilian identities, and sources close to that inquiry said only one, Sergey Cherkasov, remained in the country, in custody. A claim that more operatives have arrived for this election is an unverified rumor.117

What did OpenAI say about Russia and Brazil?

On October 8 OpenAI said it banned a Russia-origin cluster running a Latin America research front. It said the activity focused mainly on undermining Ukraine and on Argentina and Bolivia, and it described some Brazil-related content, but not a campaign to decide Brazil’s vote.6

What is Nova Resistência?

The State Department called it part of a pro-Kremlin disinformation network in 2023, and Tagesschau linked its leader, Raphael Machado, to Storm-1516 in 2026. Machado did not respond to NDR’s request for comment, and we found no statement from the group.139

Sources and footnotes

20 sources, numbered in order of first use. Brazilian government and court sources come first, then U.S. government records, company reports and news outlets. Last reviewed October 10, 2026.

  1. Flávio Bolsonaro (PL) e Lula (PT) vão disputar o 2º turno para a Presidência da República Superior Electoral Court (TSE), Oct. 5, 2026 ↩ ↩ ↩
  2. Brazil election goes to run-off as right-wing Flávio Bolsonaro wins first round BBC News, Oct. 2026 ↩
  3. Nunes Marques diz que não há risco de interferência estrangeira nas eleições g1, Oct. 4, 2026 ↩ ↩ ↩ ↩ ↩
  4. Nunes Marques diz não haver indício de interferência externa no pleito Agência Brasil, Oct. 4, 2026 ↩ ↩
  5. Brazil briefed French, German officials on alleged US, Russian election interference Reuters via The Straits Times, Sept. 30, 2026 ↩ ↩ ↩ ↩ ↩ ↩ ↩ ↩
  6. Disrupting AI-enabled “false front” operations OpenAI, Oct. 8, 2026 ↩ ↩ ↩ ↩ ↩ ↩ ↩
  7. Governo Lula abre caminho para expulsão de suposto espião russo BBC News Brasil, July 8, 2026 ↩ ↩ ↩ ↩ ↩ ↩ ↩ ↩
  8. PF arquiva pedido da AGU para investigar suspeita de interferência estrangeira nas eleições Valor Econômico, Oct. 7, 2026 ↩ ↩ ↩ ↩ ↩
Show 12 more sources
  1. Wie Storm-1516 Deutschland ins Visier nimmt Tagesschau (ARD/NDR), Feb. 9, 2026 ↩ ↩ ↩ ↩
  2. Brasileiro integra rede de desinformação russa, diz site Deutsche Welle Brasil, Feb. 9, 2026, reporting Tagesschau (ARD) ↩ ↩
  3. Espiões de Putin no Brasil: como a Polícia Federal agiu para desmantelar a rede de espionagem russa Estadão, 2025 ↩ ↩ ↩
  4. Election Manipulation in Brazil’s 2022 General Elections Mozilla Foundation, Feb. 27, 2024 ↩ ↩
  5. Exporting Pro-Kremlin Disinformation: The Case of Nova Resistência in Brazil U.S. State Department Global Engagement Center, Oct. 19, 2023 (archived site) ↩ ↩
  6. The Kremlin’s Efforts to Covertly Spread Disinformation in Latin America U.S. State Department media note, Nov. 7, 2023 (archived site) ↩ ↩
  7. Nunes Marques defende resposta célere contra uso de inteligência artificial para enganar eleitores Valor Econômico, May 20, 2026 ↩ ↩
  8. Eleições: PF abre apuração sobre interferência externa Folha de S.Paulo, Oct. 4, 2026 ↩
  9. Criador do ChatGPT desarticulou rede russa que publicou elogios a Lula sob fachada de pesquisa A Investigação (newsletter), Oct. 9, 2026 ↩
  10. Russia’s so-called “Pravda” network expands worldwide DFRLab, Feb. 24, 2025 ↩
  11. Brazil: Election interference and disinformation incidents, 23 June 2026 Control Risks, June 23, 2026 ↩
  12. Não foram constatados fatos que indiquem interferência estrangeira no pleito, diz Nunes Marques R7, Oct. 5, 2026 ↩

Additional sources

Four more links with extra detail

Analysis boxes are Peter’s World analysis, not statements by any agency or outlet. Featured photo: TSE headquarters, Brasília, by Luiz Roberto/TSE, public domain, via Wikimedia Commons.

Recommended articles