Was CASSIAS.MG.GOV hit by ransomware?

CASSIAS.MG.GOV was listed by the emperador ransomware operation (Brazil) as a victim being extorted; data had not been published at the time of listing. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the emperador ransomware group?

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

Ransomware victim disclosure

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Secretaria de Estado de Fazenda de Minas Gerais

listed as CASSIAS.MG.GOV · Claimed by Emperador · listed 2 hours ago

41 GB

Data size

17000 files records

Today

Age

since listed · listed for ransom

Status timeline

ListedSep 26, 2026

Current state: Listed for ransom

At a glance

Group: Emperador
Status: Listed for ransom
Country: Brazil
Sector: Government
Listed on leak site: Sep 26, 2026
Data size: 41 GB
Records: 17000 files

About the victim

AI dossier — public-source company profile

CASSIAS.MG.GOV is a Brazilian state government system operated by the Secretaria de Estado de Fazenda (State Finance Secretary) of Minas Gerais. It handles financial and administrative functions for the state government.

Industry: Government - State Finance/Treasury

Attack summary

Severity: critical — Confirmed exfiltration of highly sensitive government data at scale including regulated personal identification, medical records, financial/banking access, and law enforcement information affecting multiple Brazilian state departments and citizens.

The Emperador group claims to have accessed network infrastructure and government credentials across multiple state departments, exfiltrating data including personal identification documents (CPF, RG, birth certificates), medical records (SUS system data), financial sector access, police records, and justice panel information. The group threatened a deadline for ransom negotiation.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Government credentials
Personal identification numbers (CPF)
National ID documents (RG/CIN)
Birth certificates
Medical records (SUS)
Financial sector access records
Police records
Justice system data
Employee records

What the group claims

Brazilian state government departments. Data includes government credentials, justice panels, financial sector access, police data, personal data, medical (SUS), RG(CIN), birth certificates, CPF identity numbers.

The leak post

captured from the group's site

[ OnTrac is a major last-mile e-commerce delivery company formed by the 2021 merger of LaserShip and OnTrac. It positions itself as a direct alternative to FedEx and UPS, offering coast-to-coast coverage, 7-day-a-week operations, and competitive rates to reach over 75% of the U.S. population. We hold your full employee database, 197k records of employee PII: employeeNumber, xrefCode, firstName,middleName, lastName, loginId, employeeId, hireDate, originalHireDate, startDate, terminated, roles, legalEntity, legalEntityAddress, homePhone, mobilePhone, businessPhone, businessMobile, pager, personalFax, personalEmail, businessEmail, facebook, linkedin, addressPrimary1, addressPrimary2, addressMailing1, addressMailing2, userApproved, nativeAuth, culture & more. We demand an amount of $1M USD in XMR, otherwise your data WILL be publicly posted. Instructions will be emailed to you shortly. If you do not receive them, contact me on session, or email me. Session: 05651c7323273b723588d47455471ee9e27feb5187a30f2933554a705aacb38358 Email: [email protected], [email protected] (I prefer session.) If you do not cooperate, your partners and employees will be targeted, we will also se…

Data the group says was taken

government credentials
justice panel access
financial sector access
police data
personal data
medical data (SUS)
RG (CIN)
birth certificates
CPF

Screenshot of the leak post

Sources

Source

Indexed 2 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 48 public disclosures across our corpus. First observed on a leak site on August 12, 2026; most recent post September 26, 2026. The operation is currently active.

Timeline of this disclosure

September 26, 2026CASSIAS.MG.GOV listed by emperador on the group's public leak site

Data size: 41 GB
Records: 17000 files

Other recent disclosures by emperador

emperador has been linked to 48 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, CASSIAS.MG.GOV is reported in Brazil, a country with 209 ransomware disclosures in our corpus.

If your organisation is affected

A listing by emperador means 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.