Was Adelphi hit by ransomware?

Adelphi was listed by the worldleaks 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 worldleaks ransomware group?

worldleaks 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 Adelphi breach?

worldleaks published data attributed to Adelphi. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Adelphi Group

listed as Adelphi · Claimed by Worldleaks · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedFeb 17, 2026
Data leakeddate unknown

At a glance

Group: Worldleaks
Status: Data leaked
Country: United Kingdom
Listed on leak site: Feb 17, 2026

About the victim

AI dossier — public-source company profile

Adelphi Group is an ISO-certified, award-winning UK manufacturer and supplier of processing and packaging machinery, operating since 1947. The company serves a wide range of industries including pharmaceutical, cosmetics, food & beverage, chemical, and veterinary sectors, with machinery installed in over 100 countries. It comprises multiple brands including Adelphi Manufacturing, Adelphi Masterfil, and Adelphi Pharma Hygiene Products.

Industry: Packaging & Filling Machinery Manufacturing
Address: United Kingdom (West Sussex area, +44 (0) 1444 472300)
Founded: 1947

Attack summary

Severity: medium — Data is listed as published (data_published) indicating exfiltration has been claimed, but no specific sensitive data types, volume, or proof files are enumerated, and the group's description of the victim is demonstrably AI-generated and inaccurate, reducing confidence in the breach's scope and authenticity.

The worldleaks group claims to have published data belonging to Adelphi Group, with the disclosure status recorded as data_published. The leak post describes the company inaccurately using AI-generated content, suggesting limited authentic internal knowledge; no specific data types, file counts, or ransom demand were stated.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Unspecified published data

Original description

AI-summarised, not from the leak post

Adelphi is a global consultancy firm specializing in healthcare solutions. They operate in more than 25 countries, providing services to the pharmaceutical, biotech, and healthcare industries. They offer transformative solutions in areas like real world evidence, patient-centered outcomes, market access strategies, and medical communication. Their expertise helps clients improve patient lives through science, data, and technology.

Sources

Victim siteadelphi.uk.com
Leak posthttps://worldleaksartrjm3c6vasllvgacbi5u3mgzkluehrzhk2jz4taufuid.onion/companies/8696247062

Source

Indexed 4 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 worldleaks

Based on the limited available data, worldleaks is a recently emerged ransomware group that was first observed in May 2025 and appears to be primarily financially motivated, having claimed 134 victims in a relatively short timeframe since its emergence. The group's origin and organizational structure remain unclear, with no publicly documented information from major cybersecurity firms or law enforcement agencies regarding their country of origin, potential affiliations, or operational model. Their targeting patterns indicate a focus on English-speaking countries, particularly the United States, United Kingdom, and Canada, with additional activity observed in Germany and Japan, while their sector targeting shows a preference for healthcare, technology, manufacturing, and consumer services organizations. Due to the group's recent emergence and limited public documentation by established threat intelligence sources, specific details about their attack methodologies, encryption techniques, extortion tactics, and notable campaigns have not yet been comprehensively analyzed or reported by organizations such as CISA, FBI, or major cybersecurity research firms. The group appears to remain active as of the most recent observations, though comprehensive threat intelligence profiling awaits further analysis and documentation by established cybersecurity authorities. The group has been linked to 167 public disclosures across our corpus. First observed on a leak site on May 18, 2025; most recent post June 11, 2026. The operation is currently active.

Timeline of this disclosure

February 17, 2026Adelphi listed by worldleakson the group's public leak site

Other recent disclosures by worldleaks

worldleaks has been linked to 167 public victims on Darkfield. A sample of the most recent:

See the full worldleaks dossier →

Sector and geography

Geographically, Adelphi is reported in United Kingdom, a country with 902 ransomware disclosures in our corpus.

If your organisation is affected

A listing by worldleaks means Adelphi 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.
Monitor for the data appearing on worldleaks'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.