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Prefeitura Municipal de Cássia, Minas Gerais

listed as Cássia MG Government (CASSIAS.MG.GOV) · Claimed by Emperador · listed 3 hours ago

Today
Age
since listed · negotiating

Status timeline

  1. ListedOct 8, 2026

Current state: Negotiating

At a glance

Group
Emperador
Status
Negotiating
Country
Brazil
Sector
Government
Listed on leak site
Oct 8, 2026

About the victim

AI dossier — public-source company profile

Cássia is a municipal government entity in Minas Gerais state, Brazil, responsible for local public administration, health services, and citizen records. The organization operates under the domain cassias.mg.gov.br.

Industry
Government & Public Administration
Address
Cássia, Minas Gerais, Brazil

Attack summary

Severity: critical — Confirmed exfiltration of regulated sensitive data at scale: personal identification documents (RG, CPF, birth certificates), medical records (SUS), financial access, police records, and government credentials affecting an entire municipal population. This constitutes exposure of PII at scale plus government operational data.

The Emperor group claims to have exfiltrated sensitive government data including credentials, judicial system access, financial records, police data, and personally identifiable information (SUS medical records, RG identity documents, birth certificates, CPF numbers). The group has published sample proof files and issued a negotiation deadline.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Government credentials
  • Justice system access panels
  • Financial sector access
  • Police records
  • SUS medical records
  • RG (national identity documents)
  • Birth certificates
  • CPF (tax ID/national identity numbers)
  • Municipal department records

The group's post references roughly 2 proof files.

What the group claims

Ransomware attack on the municipal government of Cássia, Minas Gerais, Brazil. Claimed data includes government credentials, justice panel access, financial sector data, police records, personal data, medical records (SUS), RG (CIN), birth certificates, and CPF identity numbers from CASSIAS.MG.GOV departments.

The leak post

captured from the group's site
network commitment, from government credentials to justice panels, such as access to the financial sector, police, personal data, medical (SUS), RG(CIN), BIRTH CERTIFICATE, CPF (identity number in Brazil) among other data from CASSIAS.MG.GOV departments, we will give you a deadline to negotiate with us!
[UBS TIPO I CÁSSIA-UBS 1 CÁSSIA.pdf](http://emprdr4p7iwlhpky33tswt3k2qdeljyjcdpoysabudmmrz4z32laexad.onion/post/cassias-mg-government/sample/24/)
[Débitos Agrupados por Origem de Lançamento_2026-09-04_17_02_47 (1).pdf](http://emprdr4p7iwlhpky33tswt3k2qdeljyjcdpoysabudmmrz4z32laexad.onion/post/cassias-mg-government/sample/25/)

Data the group says was taken

  • government credentials
  • financial records
  • police records
  • personal data
  • medical records
  • identity documents (RG/CIN)
  • birth certificates
  • CPF numbers

Screenshot of the leak post

Leak screenshot for Cássia MG Government (CASSIAS.MG.GOV)

Sources

Source

Indexed 3 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 emperador

Emperador is a ransomware group first observed in August 2026 with an apparent financial motivation, though its limited operational history makes comprehensive attribution difficult at this time. Based on available data, the group has recorded at least one confirmed victim, with targeting concentrated in the Philippines and a demonstrated focus on the Government and Defense sector, suggesting either opportunistic targeting or a deliberate interest in sensitive public-sector data. Specific details regarding initial access vectors, encryption methodologies, and tooling have not been publicly documented by CISA, the FBI, Mandiant, or other reputable threat intelligence sources as of this profile's compilation, and no affiliation with known ransomware-as-a-service ecosystems or established threat actor clusters has been formally established. No notable high-profile campaigns, record ransom demands, or law enforcement actions have been publicly attributed to this group, which is consistent with its nascent operational timeline and minimal victim count. Given its very recent emergence and limited observed activity, Emperador should be considered an emerging and uncharacterized threat requiring continued monitoring, particularly by organizations operating within Philippine government and defense environments. The group has been linked to 67 public disclosures across our corpus. First observed on a leak site on August 12, 2026; most recent post October 8, 2026. The operation is currently active.

Timeline of this disclosure

  • October 8, 2026Cássia MG Government (CASSIAS.MG.GOV) listed by emperador on the group's public leak site

Other recent disclosures by emperador

emperador has been linked to 67 public victims on Darkfield. A sample of the most recent:

See the full emperador dossier →

Sector and geography

This disclosure adds to ransomware activity in the Government sector, which has 685 disclosures indexed across all operators we track. Geographically, Cássia MG Government (CASSIAS.MG.GOV) is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by emperador means Cássia MG Government (CASSIAS.MG.GOV) appeared on a ransomware extortion site and is being pressured to pay before any publication. 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 emperador'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.