high severity July 30, 2025 · 3 min read Unverified claim — what this is

Banco Guanabara Listed by DragonForce Ransomware Group

If you are a customer of Banco Guanabara, here’s what is being claimed, and what it would mean for you.

Banco Guanabara was listed on DragonForce's leak site. DragonForce claims to have stolen internal data. This is the group's claim, not a confirmed finding.

Banco Guanabara Listed by DragonForce Ransomware Group

On July 30, 2025, Brazilian financial institution Banco Guanabara appeared on the leak site of the dragonforce ransomware group, with the attackers claiming to have exfiltrated internal files following a ransomware incident.

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Reported Details of the Incident

Public reporting indicates the bank, which specializes in commercial vehicle financing including buses, trucks, Sprinters, CDC loans, leasing, and BNDES Finame programs, was listed with its full address at Av. Brasil 8.255, Ramos, Rio de Janeiro, RJ, CEP 21030-000, and contact telephone number (21) 2562-9600. The listing on the dragonforce leak site states that internal files were taken during the attack. The exact number of people whose data may have been exposed remains unknown, and the specific types of records contained in the exfiltrated files have not been publicly detailed. No confirmation or statement from the bank itself has been widely reported at the time of this writing.

Why This Matters for You and Your Family

When a financial services company like Banco Guanabara suffers a breach, the information at risk often includes personal details that lenders routinely collect: names, addresses, national identification numbers, income records, bank account information, and loan application data. Any of these can be used to file fraudulent loan applications, open accounts in your name, or build a profile for identity theft. If you or anyone in your family has ever financed a vehicle, applied for credit, or done business with this institution, your information could now be in the hands of criminals. Families in Brazil are particularly exposed because credit and financing records frequently link parents, spouses, and sometimes adult children through joint applications or shared addresses.

The Doxxing and Identity-Chain Risks

Stolen internal files from a financing company rarely stay isolated. Attackers can combine leaked names, addresses, phone numbers, and email addresses with data from previous breaches to create detailed identity chains. A single leaked customer record can reveal your email, which then links to gaming accounts, social media handles, or family member profiles. This is exactly why credential leaks like this one cascade into account takeovers and doxxing chains. Criminals increasingly target gaming accounts belonging to you or your children because those accounts often reuse passwords or security questions derived from personal data. Once they control a gaming profile tied to your real identity, they can demand payment, harass family members, or sell the full chain on underground markets.

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Found on people-search siteswe remove these

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value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Report details & sourcing

Attributed to DragonForce · 663 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed July 30, 2025

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

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DragonForce — 663 incidents tracked

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