Was ESMS Global Limited hit by ransomware?

ESMS Global Limited was listed by the anubis 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 anubis ransomware group?

anubis 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 ESMS Global Limited breach?

anubis published data attributed to ESMS Global Limited. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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ESMS Global Limited

Claimed by Anubis · listed 4 days ago

Age

since listed · data leaked

Status timeline

ListedJun 29, 2026
Data leakeddate unknown

At a glance

Group: Anubis
Status: Data leaked
Country: United Kingdom
Sector: Business Services
Listed on leak site: Jun 29, 2026

About the victim

AI dossier — public-source company profile

ESMS Global Limited is a UK-based medical information services provider specialising in 24/7 multilingual support for clinical trials, including emergency unblinding services, patient recruitment, and post-approval product support. The company is a spin-out from Guy's Hospital Poisons Unit and serves pharmaceutical and medical device companies conducting clinical research.

Industry: Medical Information Services & Clinical Trial Support
Address: Apex Yard, 29 Long Lane, London SE1 4PL, UK

Attack summary

Severity: high — Confirmed data exfiltration from a medical services provider handling clinical trial and patient data, which constitutes regulated healthcare information. The vague disclosure suggests sensitive medical records may be at risk, though the lack of detail limits full assessment.

The Anubis group claims to have breached ESMS Global and exfiltrated medical information services data. The post provides minimal detail on the scope or nature of the data accessed.

high

Data the group says was taken

AI dossier — extracted from the leak post

Medical information
Clinical trial data
Patient information
Serious adverse event reports

What the group claims

Medical information services data breach.

Sources

Source

Indexed 4 days 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 anubis

Anubis is a recently emerged ransomware group that began operations in February 2025, primarily motivated by financial gain through encryption and extortion attacks. The group has demonstrated rapid expansion, accumulating 65 documented victims within a short operational timeframe. Given the group's recent emergence, limited information is publicly available regarding their specific country of origin, organizational structure, or confirmed affiliations with other cybercriminal entities, though their operational patterns suggest they may operate as an independent group or small-scale ransomware-as-a-service operation. Their attack methodology appears to focus on opportunistic targeting across multiple geographic regions, with victims concentrated primarily in the United States, Australia, Canada, the United Kingdom, and France, indicating either English-language proficiency or the use of automated tools that facilitate cross-border operations. The group demonstrates a clear preference for targeting healthcare organizations and manufacturing companies, followed by business services and technology sectors, suggesting they prioritize organizations with critical operational dependencies that may be more likely to pay ransoms quickly. Due to the group's recent emergence in early 2025, there is insufficient publicly documented information from established cybersecurity firms or law enforcement agencies regarding their specific technical capabilities, encryption methods, or whether they employ double or triple extortion tactics involving data theft and leak sites. As of current reporting, Anubis remains an active threat with continued victim acquisition, though the full scope of their capabilities and long-term operational sustainability remains to be determined as security researchers continue to analyze their activities. The group has been linked to 92 public disclosures across our corpus. First observed on a leak site on February 25, 2025; most recent post July 3, 2026. The operation is currently active.

Timeline of this disclosure

June 29, 2026ESMS Global Limited listed by anubison the group's public leak site

Other recent disclosures by anubis

anubis has been linked to 92 public victims on Darkfield. A sample of the most recent:

See the full anubis dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, ESMS Global Limited is reported in United Kingdom, a country with 372 ransomware disclosures in our corpus.

If your organisation is affected

A listing by anubis means ESMS Global Limited 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 anubis'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.