Was Universidade Federal de Sergipe hit by ransomware?

Universidade Federal de Sergipe 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 Universidade Federal de Sergipe breach?

thegentlemen published data attributed to Universidade Federal de Sergipe. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Universidade Federal de Sergipe

Claimed by Thegentlemen · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedFeb 26, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Brazil
Sector: Education
Listed on leak site: Feb 26, 2026

About the victim

AI dossier — public-source company profile

Universidade Federal de Sergipe (UFS) is a Brazilian federal public university located in São Cristóvão, Sergipe, Brazil. It offers undergraduate, graduate, and research programs across a wide range of disciplines and is one of the main higher education institutions in the Northeast region of Brazil. The university serves tens of thousands of students and is funded by the federal government.

Industry: Higher Education
Address: Cidade Universitária Prof. José Aloísio de Campos, São Cristóvão, Sergipe, Brazil
Employees: 1001-5000
Founded: 1967

Attack summary

Severity: high — The target is a public federal university handling PII of thousands of students and staff; disclosure status is 'data_published', indicating confirmed exfiltration and publication of data, which likely includes regulated personal and academic records at scale.

The group 'thegentlemen' claims to have attacked Universidade Federal de Sergipe and the disclosure status is listed as 'data_published', suggesting data exfiltration and publication. The leak post content is inaccessible due to a bot-verification page, so specific details about the data scope cannot be confirmed from the post itself.

high

Data the group says was taken

AI dossier — extracted from the leak post

Student records
Faculty and staff personal data
Administrative documents
Research data
Financial records

What the group claims

https://www.zoominfo.com/c/universidade-federal-de-sergipe/429754078 www.ufs.br The Federal University of Sergipe (Portuguese: Universidade Federal de Sergipe, UFS) is a Brazilian public institution based in Sergipe, with campuses in São Cristóvão, Aracaju, Itabaiana, Laranjeiras, and Lagarto. Founded in 1967 by the junction of the state's existing colleges, it became its second university (the first being the University of Tiradentes, a private institution founded in 1962)and its first public one. It became the state's most reputable and competitive higher education institution, ranking among the country's 40 best universities and Latin America's top 200 list. IN DATA: Students personal data, private Personal Information, scientific projects, documents for internal use, etc

The leak post

captured from the group's site

Gentlecloud Protection 🛡️ Gentlecloud Verifying your browser... Initializing security checks... I'm not a bot

Sources

Victim sitewww.zoominfo.com
Leak posthttp://tezwsse5czllksjb7cwp65rvnk4oobmzti2znn42i43bjdfd2prqqkad.onion

Source

Indexed 4 months 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 483 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post June 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

February 26, 2026Universidade Federal de Sergipe listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 483 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 Education sector, which has 694 disclosures indexed across all operators we track. Geographically, Universidade Federal de Sergipe is reported in Brazil, a country with 319 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Universidade Federal de Sergipe 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.
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.