Was CCOO Servicios hit by ransomware?

CCOO Servicios was listed by the Hunters International 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 Hunters International ransomware group?

Hunters International 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 CCOO Servicios breach?

Hunters International published data attributed to CCOO Servicios. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Comisiones Obreras (CCOO) - Federación de Servicios

listed as CCOO Servicios · Claimed by Hunters International · listed 1 year ago

16m

Age

since listed · data leaked

Status timeline

ListedFeb 22, 2025
Data leakeddate unknown

At a glance

Group: Hunters International
Status: Data leaked
Country: Spain
Sector: Business Services
Listed on leak site: Feb 22, 2025

About the victim

AI dossier — public-source company profile

CCOO Servicios is the Services Federation of Comisiones Obreras (CCOO), Spain's major labor union. It provides collective bargaining representation, labor law consultation, workplace health & safety advocacy, and member services across multiple sectors including finance, retail, hospitality, contact centers, and engineering.

Industry: Labor Union & Workers' Representation

Attack summary

Severity: high — Target is a major labor union with access to sensitive member data (PII at scale), employer negotiations, and internal union records. Confirmed exfiltration and encryption indicate operational disruption to a critical civil society organization. However, no specific regulated data categories or scale are explicitly confirmed in the post excerpt.

The Hunters group claims to have exfiltrated data from CCOO Servicios and encrypted systems. The specific nature and sensitivity of the exfiltrated data is not detailed in the available post excerpt.

high

Data the group says was taken

AI dossier — extracted from the leak post

Union member records
Collective bargaining agreements
Financial/administrative documents
Internal communications

What the group claims

Exfiltraded data : yes - Encrypted data : yes

Sources

Victim siteccoo-servicios.es
Leak posthttps://hunters55rdxciehoqzwv7vgyv6nt37tbwax2reroyzxhou7my5ejyid.onion/companies/6679663115

Source

Indexed 1 year 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 Hunters International

Hunters International is a ransomware group that emerged in October 2023, operating with primarily financial motivations and demonstrating rapid expansion in their victim targeting across multiple sectors. The group's origin and specific affiliations remain largely undocumented by major security agencies, though their operational patterns suggest they function as an independent ransomware operation rather than a established Ransomware-as-a-Service model. Based on publicly available victim data, Hunters International has demonstrated a preference for targeting business services, technology, and manufacturing sectors, with their attacks primarily concentrated in English-speaking countries including the United States, France, and the United Kingdom. Their attack methodology and specific technical capabilities have not been extensively documented by major threat intelligence organizations such as CISA, FBI, or Mandiant, limiting detailed analysis of their initial access vectors, encryption methods, or data exfiltration practices. With 388 documented victims since their emergence, the group has shown consistent activity levels, though specific high-profile campaigns or notable ransom demands have not been widely reported in public threat intelligence reports. As of current reporting, Hunters International appears to remain active with no documented law enforcement disruptions or operational changes reported by major cybersecurity agencies. The group has been linked to 695 public disclosures across our corpus. First observed on a leak site on October 20, 2023; most recent post March 26, 2026. The operation is currently active.

Also tracked as: Hunters.

Timeline of this disclosure

February 22, 2025CCOO Servicios listed by Hunters Internationalon the group's public leak site

Other recent disclosures by Hunters International

Hunters International has been linked to 695 public victims on Darkfield. A sample of the most recent:

See the full Hunters International dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, CCOO Servicios is reported in Spain, a country with 351 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Hunters International means CCOO Servicios 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, INCIBE-CERT (Spain), as required for your jurisdiction.
Monitor for the data appearing on Hunters International'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.