Disclosure context

About genesis

Genesis is a recently emerged ransomware group that was first observed in October 2025, operating with apparent financial motivations based on their targeting patterns across multiple high-value sectors. The group has demonstrated a relatively aggressive operational tempo since emergence, accumulating 54 documented victims within a short timeframe. Given the limited public documentation available from established threat intelligence sources regarding this newly identified group, specific details about their country of origin, organizational structure, and precise attack methodologies remain under investigation by security researchers. The group's targeting patterns indicate a preference for victims in the United States and United Kingdom, with additional activity observed in Malaysia and Spain, suggesting either a broad operational scope or the use of automated targeting tools that do not discriminate by geography. Their sector targeting reveals a focus on healthcare, manufacturing, business services, and financial services organizations, indicating they may prioritize entities with both high revenue potential and critical operational dependencies that increase pressure for ransom payment. Due to the group's recent emergence and limited reporting from major threat intelligence organizations such as Mandiant, CISA, or FBI, comprehensive details regarding their specific encryption methods, initial access vectors, data exfiltration practices, or notable high-profile campaigns have not yet been publicly documented. Genesis remains an active threat as of current reporting, though their operational longevity and potential connections to established ransomware ecosystems continue to be assessed by the cybersecurity community. The group has been linked to 82 public disclosures across our corpus. First observed on a leak site on October 21, 2025; most recent post May 19, 2026. The operation is currently active.

Timeline of this disclosure

March 31, 2026MC-Rx listed by genesison the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, MC-Rx is reported in US, a country with 2,713 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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MC-Rx

Claimed by genesis · listed 2 months ago

50d

Age

since listed · data leaked

Status timeline

Listed
Mar 31, 2026
Data leaked

At a glance

Group: genesis
Status: Data leaked
Country: US
Sector: Not Found
Listed on leak site: Mar 31, 2026

About the victim

AI dossier — public-source company profile

MC-Rx (formerly MC-21 and ProCare PBM) is a full-service Pharmacy Benefit Management company operating in the United States and Puerto Rico with a combined business presence exceeding 50 years. It serves commercial health plans, employer groups, Medicare Part D, Medicaid Managed Care, hospice organizations, unions, and other plan sponsors. The company offers customized PBM solutions including clinical services, mail order/home delivery, specialty pharmacy, workers' compensation, and a proprietary technology platform.

Industry: Pharmacy Benefit Management (PBM) & Healthcare Services

Attack summary

Severity: critical — MC-Rx is a PBM handling regulated health data (PHI) for Medicare Part D, Medicaid, commercial health plans, and other plan sponsors across the US and Puerto Rico. Data published status combined with the nature of the business virtually guarantees exposure of protected health information (PHI) and personally identifiable information (PII) at scale, meeting the critical threshold.

The Genesis ransomware group claims to have published data obtained from MC-Rx, with the post marked as 'data_published' and a read time of 13 minutes suggesting substantive content. The specific data types exfiltrated or whether encryption occurred are not explicitly described in the leak post excerpt.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Member/patient records
Pharmacy benefit management data
Health plan records
Medicare/Medicaid managed care data
Client account information
Prescription and clinical services data

What the group claims

Formerly MC-21 and ProCare PBM

The leak post

captured from the group's site

GENESIS GENESIS Archive Tags About GENESIS [email protected] Pequod Associates A global leader in the provision of Marine Claims TPA and Recovery services. 2026-05-11 · 1min Pequod Associates HostBooks (HOT!) An accounting software provider. 2026-05-09 · 1min HostBooks (HOT!) Palo Architecture and Planning. 2026-05-09 · 1min Palo Ben F. Barcus and associates pllc A law firm from Tacoma, WA. 2026-05-09 · 1min Ben F. Barcus and associates pllc Rain Makers Solutions Conducting training sessions, engaging with stakeholders, and organizing meetings and events. 2026-05-08 · 1min Rain Makers Solutions Van Atta Engineering A civil engineering and surveying firm located at 570 Congress Park Dr, Dayton, Ohio. 2026-05-08 · 1min Van Atta Engineering Prescott & Holden A legal firm dedicated to safeguard the rights of its clients 2026-05-08 · 1min Prescott & Holden The American Board of Preventive Medicine A healthcare certification organization. 2026-05-08 · 1min The American Board of Preventive Medicine Integrated Process Engineers & Constructors. Specializes in custom modular process systems, offering a wide range of products including bioreactors, filtration systems, and utility sta…

Sources

Victim sitemc-rx.com
Leak posthttp://genesis6ixpb5mcy4kudybtw5op2wqlrkocfogbnenz3c647ibqixiad.onion/6ec9d951deef0bbe770c/

Source

Indexed 2 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.