Was Multipla Contabilidade Empresarial hit by ransomware?

Multipla Contabilidade Empresarial was listed by the thegentlemen ransomware operation (Brazil), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the thegentlemen ransomware group?

thegentlemen is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Multipla Contabilidade Empresarial breach?

thegentlemen published data attributed to Multipla Contabilidade Empresarial. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Multipla Contabilidade Empresarial

Claimed by Thegentlemen · listed 20 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedSep 15, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Brazil
Sector: Professional Services
Listed on leak site: Sep 15, 2026

About the victim

AI dossier — public-source company profile

Multipla Contabilidade Empresarial is a family-owned accounting and financial services firm based in Piracicaba, São Paulo, Brazil, founded in 2002 and operating since 1990. They provide industry-specialized accounting (services, commerce, industry, healthcare, construction, agribusiness), financial BPO outsourcing, company formation & legalization, tax planning, and payroll/HR services. The firm employs 15–20 staff and is run by Renata Nunes Albino Semmler and Charles Semmler.

Industry: Accounting & Financial Services
Address: Piracicaba, São Paulo state, Brazil
Employees: 15-20
Founded: 2002

Attack summary

Severity: high — Confirmed exfiltration of financial and accounting data belonging to multiple client businesses across regulated sectors (healthcare, construction) and employee payroll/HR data. Accounting firms hold sensitive client PII and financial information at scale. Data published status confirms disclosure.

The group claims to have breached Multipla Contabilidade Empresarial and exfiltrated client and operational data. No ransom demand or specific data loss details are stated in the leak post excerpt provided.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client accounting records
Financial statements
Payroll and HR data (eSocial, DCTFWeb)
Tax planning documents
Company formation records
Business entity information

What the group claims

contabilmultipla.com.br Multipla Contabilidade Empresarial family accounting firm from Piracicaba, São Paulo state, operating since 1990 — legal entity MULTIPLA CONTABILIDADE EMPRESARIAL S/S LTDA (CNPJ 05.145.683/0001-99, founded 01/07/2002, capital R$700,000, Simples taxpayer), owned and run by husband-and-wife team Renata Nunes Albino Semmler (accounting director, 35+ years in the profession) and Charles Semmler, with the second generation (Beatriz & Eduardo Albino Semmler) joining family firms in 2026. Services: industry-specialized accounting (services, commerce, industry, healthcare, construction, agribusiness), BPO financial outsourcing (spun into Multipla Gestão Financeira, 2022), company formation & legalization, tax planning & revision, and full payroll/HR (eSocial, DCTFWeb). Team of ~15–20

Sources

Victim sitecontabilmultipla.com.br

Source

Indexed 20 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 868 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post September 15, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

September 15, 2026Multipla Contabilidade Empresarial listed by thegentlemen on the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 868 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Professional Services sector, which has 17 disclosures indexed across all operators we track. Geographically, Multipla Contabilidade Empresarial is reported in Brazil, a country with 209 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Multipla Contabilidade Empresarial appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CERT.br (Brazil), as required for your jurisdiction.
Monitor for the data appearing on thegentlemen's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.