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 568 public disclosures across our corpus. First observed on a leak site on November 15, 2022; most recent post February 14, 2026. The operation is currently active.

Also tracked as: MedusaLocker.

Timeline of this disclosure

December 19, 2025Shamrock Technologies listed by Medusaon the group's public leak site

Records: 200 Employees

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,524 disclosures indexed across all operators we track. Geographically, Shamrock Technologies is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Shamrock Technologies

Claimed by Medusa · listed 5 months ago

200 Employees

Records

Age

since listed · data leaked

Status timeline

Listed
Dec 19, 2025
Data leaked

At a glance

Group: Medusa
Status: Data leaked
Country: United States
Sector: Technology
Listed on leak site: Dec 19, 2025
Records: 200 Employees

About the victim

AI dossier — public-source company profile

Shamrock Technologies is a U.S.-based manufacturer known for producing micronized and specialty wax, polytetrafluoroethylene (PTFE), and carbon black products used in coatings, inks, and plastics industries. The company is headquartered in Newark, New Jersey and serves industrial and specialty chemical markets globally. It is a well-established supplier of performance additives to a range of manufacturing sectors.

Industry: Specialty Chemicals & Carbon Black Manufacturing

Attack summary

Severity: high — Medusa is a known double-extortion group and the disclosed status is 'data_published', meaning data has reportedly been released publicly. Even without confirmed data categories, published exfiltration from a specialty chemical manufacturer likely involves sensitive business, operational, and potentially employee PII data warranting a high severity rating.

The Medusa ransomware group claims to have attacked Shamrock Technologies and has listed the disclosure status as data_published, indicating exfiltration and/or publication of company data. Specific data categories and proof materials could not be verified due to the leak post being blocked by a CAPTCHA challenge.

high

What the group claims

Founded in 1941, Shamrock Technologies is a global provider of micronized polytetrafluoroethylene products. They also offer a line of specialty micronized powders, dispersions, emulsions, and compounds including PTFE, polyethylene, polypropylene, fluoropolymers, custom wax alloys, natural waxes, and other specialty additives. Their products are found in inks and coatings, thermoplastics, greases, elastomers, personal care products, and other specialty applications. The company headquarters is located in Newark, New Jersey. 51-200 Employees

The leak post

captured from the group's site

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Sources

Leak posthttp://xfv4jzckytb4g3ckwemcny3ihv4i5p4lqzdpi624cxisu35my5fwi5qd.onion/detail?id=4dc305b1606aa24d8abb8a75b05edf37

Source

Indexed 5 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.