Was RM Medics hit by ransomware?

RM Medics was listed by the sinobi ransomware operation (United Kingdom), 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 sinobi ransomware group?

sinobi 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 RM Medics breach?

sinobi published data attributed to RM Medics. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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RM Medics

Claimed by Sinobi · listed 7 months ago

Age

since listed · data leaked

Status timeline

ListedDec 19, 2025
Data leakeddate unknown

At a glance

Group: Sinobi
Status: Data leaked
Country: United Kingdom
Sector: Healthcare
Listed on leak site: Dec 19, 2025

About the victim

AI dossier — public-source company profile

RM Medics is a UK-based medical recruitment agency specialising in placing locum doctors and other healthcare professionals in NHS hospitals across the United Kingdom. The company has over 30 years of experience in the sector and offers an out-of-hours service to meet urgent hospital staffing needs. Its client base consists primarily of NHS hospitals requiring temporary and permanent locum placements.

Industry: Healthcare Staffing & Medical Recruitment

Attack summary

Severity: high — Data has been published by the threat actor against a medical recruitment agency handling sensitive personal and professional records of healthcare workers and NHS client data, representing confirmed exfiltration of significant business and potentially regulated personal data in the healthcare sector.

The Sinobi ransomware group claims to have attacked RM Medics and has published data (disclosed status: data_published), though the leak post does not specify whether encryption, exfiltration, or both occurred, nor does it quantify the volume of data involved.

high

Data the group says was taken

AI dossier — extracted from the leak post

Healthcare professional records
Locum doctor placement data
NHS hospital client information
Recruitment and compliance documentation

What the group claims

RM Medics is a medical recruitment agency specializing in placing healthcare professionals, particularly locum doctors, in NHS hospitals throughout the UK. The company prides itself on its exceptional recruitment consultants and a commitment to providing quality assurance and compliance with NHS standards. With over 30 years of experience, RM Medics offers an out-of-hours service, ensuring quick and efficient solutions for hospitals in urgent need. Their client base primarily includes NHS hospitals requiring both temporary and permanent locum placements.

Sources

Victim sitewww.rmmedics.com
Leak posthttp://sinobi6ftrg27d6g4sjdt65malds6cfptlnjyw52rskakqjda6uvb7yd.onion/leaks/6945c83088b6823fa2d69d8a

Source

Indexed 7 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 sinobi

Based on the limited publicly available information, Sinobi appears to be a recently emerged ransomware operation first observed in July 2025, with financial motivations evidenced by their targeting of 268 victims across multiple sectors. The group's origin and specific affiliations remain undocumented in public threat intelligence reporting, and there is no confirmed information regarding whether they operate as a Ransomware-as-a-Service model or as an independent entity. Their attack methodology and technical capabilities have not been extensively documented by major security research organizations, though their targeting patterns suggest a broad opportunistic approach rather than highly selective operations. The group demonstrates a preference for targeting organizations in the United States, India, United Kingdom, Canada, and Italy, with a focus on manufacturing, healthcare, construction, and technology sectors, suggesting they may exploit common vulnerabilities across these industries rather than deploying sophisticated, sector-specific attack vectors. No major high-profile campaigns or significant law enforcement actions against Sinobi have been publicly reported by CISA, FBI, or established threat intelligence firms. Given the recent emergence timeline and lack of extensive public documentation, the group's current operational status and long-term trajectory remain unclear, though the substantial victim count suggests continued activity as of the last available reporting period. The group has been linked to 274 public disclosures across our corpus. First observed on a leak site on July 5, 2025; most recent post May 8, 2026. The operation is currently active.

Timeline of this disclosure

December 19, 2025RM Medics listed by sinobion the group's public leak site

Other recent disclosures by sinobi

sinobi has been linked to 274 public victims on Darkfield. A sample of the most recent:

See the full sinobi 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, RM Medics is reported in United Kingdom, a country with 1,217 ransomware disclosures in our corpus.

If your organisation is affected

A listing by sinobi means RM Medics 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, NCSC (United Kingdom), as required for your jurisdiction.
Monitor for the data appearing on sinobi'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.