Was El IBR hit by ransomware?

El IBR was listed by the thegentlemen ransomware operation (Spain), 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 El IBR breach?

thegentlemen published data attributed to El IBR. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET)

listed as El IBR · Claimed by Thegentlemen · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedFeb 24, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Spain
Listed on leak site: Feb 24, 2026

About the victim

AI dossier — public-source company profile

The Instituto de Biología Molecular y Celular de Rosario (IBR) is a public scientific research institute jointly operated by CONICET (Argentina's national research council) and the Universidad Nacional de Rosario, located in Rosario, Santa Fe, Argentina. It focuses on molecular and cellular biology research across multiple laboratories and research groups. Despite the current record listing Spain as the country, the domain ibr-conicet.gov.ar and public site content confirm it is an Argentine government-affiliated entity.

Industry: Public Research Institute – Molecular & Cellular Biology
Address: Ocampo y Esmeralda, Predio CONICET Rosario, S2000EZP Rosario, Santa Fe, Argentina

Attack summary

Severity: high — The victim is a government-affiliated public research institute (CONICET); data_published status indicates confirmed exfiltration of institutional data which may include sensitive research, personnel records, and government-related information, warranting a high severity rating even without a quantified data volume.

The ransomware group 'thegentlemen' claims to have attacked IBR-CONICET and has published data (disclosed status: data_published), though the leak post content is inaccessible due to a bot-verification challenge page, making specific exfiltration or encryption claims unverifiable from the post alone.

high

Data the group says was taken

AI dossier — extracted from the leak post

Research data (inferred)
Internal institutional documents (inferred)
Staff/personnel records (inferred)

What the group claims

ibr-conicet.gov.ar zoominfo.com/c/el-ibr/547000244 IBR is a leading research institute with over 240 professionals specializing in microbiology, biomedicine, structural biology, and agrobiotechnology. It offers cutting-edge technology and access to advanced infrastructure for researchers, companies, and organizations globally. The institute promotes scientific knowledge generation and its transfer to the production sector while encouraging innovation through startups led by researchers. IBR also provides opportunities for doctoral and postdoctoral training to advance careers in scientific research

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 siteibr-conicet.gov.ar
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 24, 2026El IBR 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

Geographically, El IBR is reported in Spain, a country with 212 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means El IBR 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.