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Coosalud EPS

listed as coosalud.com · Claimed by Threeam · listed 6 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedSep 28, 2026
  2. Data leakeddate unknown

At a glance

Group
Threeam
Status
Data leaked
Country
Colombia
Sector
Healthcare
Listed on leak site
Sep 28, 2026

About the victim

AI dossier — public-source company profile

Coosalud EPS (Coosalud Entidad Promotora de Salud S.A.) is a major health promotion entity in Colombia managing subsidized and contributory healthcare regimes. The organization operates with multi-million-peso annual volumes and serves a significant portion of the Colombian healthcare system.

Industry
Healthcare – Health Insurance & Promotion Entities (EPS)

Attack summary

Severity: high — Coosalud EPS manages healthcare and insurance data for Colombian citizens across subsidized and contributory regimes. Access to such systems implies potential exposure of personal health information and insurance records at significant scale, characteristic of critical infrastructure in the healthcare/insurance sector. Severity elevated to 'high' pending confirmation of exfiltration vs. encryption-only and actual proof publication.

ThreeAM claims to have accessed Coosalud EPS systems. The specific data exfiltrated and operational impact (encryption, data theft, or both) are not detailed in the truncated leak post.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Healthcare records
  • Patient information
  • Insurance/subscriber data

What the group claims

Coosalud EPS (Coosalud Entidad Promotora de Salud S.A.) is one of the major health promotion entities (EPS) in Colombia, primarily managing subsidized and contributory healthcare regimes with multi-million-peso operating volumes. Alongside its sub

Sources

Source

Indexed 6 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 Threeam

Threeam is a financially motivated ransomware group that emerged in September 2023, operating as a relatively new player in the ransomware ecosystem with 64 documented victims across multiple countries and sectors. The group's origin and potential affiliations remain unclear due to limited public documentation from major security agencies, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing. Based on available victim data, Threeam appears to employ common initial access vectors targeting organizations across business services, healthcare, manufacturing, and technology sectors, with the United States, United Kingdom, Australia, France, and Brazil representing their primary geographic focus areas. While specific technical details about their encryption methods and extortion tactics have not been extensively documented by major threat intelligence firms, their emergence in late 2023 and victim count suggests they have established operational capabilities within the competitive ransomware landscape. The group's current operational status remains active based on the recency of their emergence, though detailed law enforcement actions or disruption efforts have not been publicly reported by CISA, FBI, or other major security organizations. The group has been linked to 99 public disclosures across our corpus. First observed on a leak site on September 14, 2023; most recent post September 28, 2026. The operation is currently inactive.

Timeline of this disclosure

  • September 28, 2026coosalud.com listed by Threeam on the group's public leak site

Other recent disclosures by Threeam

Threeam has been linked to 99 public victims on Darkfield. A sample of the most recent:

See the full Threeam dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,608 disclosures indexed across all operators we track. Geographically, coosalud.com is reported in Colombia, a country with 20 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Threeam means coosalud.com 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 Threeam'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.