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Organon

Claimed by Medusa · listed 9 months ago

478.2 GB
Data size
10.000 Employees records
9m
Age
since listed · data leaked

Status timeline

  1. ListedOct 4, 2025
  2. Data leakeddate unknown

At a glance

Group
Medusa
Status
Data leaked
Country
United States
Sector
Healthcare
Listed on leak site
Oct 4, 2025
Data size
478.2 GB
Records
10.000 Employees

About the victim

AI dossier — public-source company profile

Organon & Co. is a global pharmaceutical company spun off from Merck & Co. in 2021, headquartered in Jersey City, New Jersey. The company focuses on women's health, biosimilars, and established medicines, operating in more than 140 countries. Organon employs approximately 10,000 people worldwide and is publicly traded on the NYSE.

Industry
Pharmaceutical & Women's Health
Address
30 Hudson Street, Floor 33, Jersey City, NJ 07302, United States
Employees
10000+
Founded
2021

Attack summary

Severity: critical — Organon is a major global pharmaceutical company operating in healthcare; 478.2 GB of published data in a regulated sector strongly implies exfiltration of sensitive business, employee PII, and potentially clinical or financial data at scale, meeting the threshold for critical severity.

The Medusa ransomware group claims to have exfiltrated approximately 478.2 GB of data from Organon and has published the data (disclosed status: data_published). The nature of the exfiltrated content is not detailed in the truncated leak post, but the volume and sector suggest significant corporate and potentially regulated data.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Corporate files
  • Potentially regulated pharmaceutical data
  • Potentially employee PII
  • Potentially financial records
  • Potentially clinical or product data

What the group claims

Organon creates, manufactures and markets innovative prescription medicines that improve the health and quality of human life. Through a combination of innovation and business partnerships, Organon seeks to leverage each of its core therapeutic fields. company is headquartered in 30 Hudson Street, Jersey City, New Jersey 07302, USA. 10,000 Employees. The total amount of data leakage is 478.2 GB

The leak post

captured from the group's site
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Sources

Source

Indexed 9 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 Medusa

Medusa, also known as MedusaLocker, is a financially motivated ransomware group that emerged in November 2022 and has since compromised 568 known victims across multiple countries. The group's origin and specific affiliations remain unclear from publicly available intelligence, though their operational patterns suggest they function as an independent ransomware operation rather than a documented Ransomware-as-a-Service model. Medusa primarily targets organizations in the United States, United Kingdom, Canada, Italy, and Australia, with a focus on business services, healthcare, manufacturing, and technology sectors, employing typical ransomware tactics including data encryption and likely exfiltration for double extortion purposes, though specific technical methodologies and initial access vectors have not been extensively documented in public threat intelligence reports. While the group has maintained a relatively high victim count since its emergence, detailed information about specific notable campaigns, high-profile victims, or major ransom demands has not been widely reported by major cybersecurity firms or law enforcement agencies. As of current intelligence assessments, Medusa appears to remain active in the threat landscape, continuing to target organizations across their established geographic and sectoral preferences. The group has been linked to 635 public disclosures across our corpus. First observed on a leak site on November 15, 2022; most recent post May 5, 2026. The operation is currently active.

Also tracked as: MedusaLocker, MEDUSA LOCKER.

Timeline of this disclosure

  • October 4, 2025Organon listed by Medusaon the group's public leak site
Data size
478.2 GB
Records
10.000 Employees

Other recent disclosures by Medusa

Medusa has been linked to 635 public victims on Darkfield. A sample of the most recent:

See the full Medusa dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, Organon is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Medusa means Organon 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, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on Medusa'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.