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 155 public disclosures across our corpus. First observed on a leak site on May 18, 2025; most recent post May 12, 2026. The operation is currently active.

Timeline of this disclosure

April 28, 2026Mediaworks Kft listed by worldleakson the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, Mediaworks Kft is reported in HU.

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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Mediaworks Hungary Zrt.

listed as Mediaworks Kft · Claimed by worldleaks · listed 22 days ago

22d

Age

since listed · data leaked

Status timeline

Listed
Apr 28, 2026
Data leaked

At a glance

Group: worldleaks
Status: Data leaked
Country: HU
Sector: Business Services
Listed on leak site: Apr 28, 2026

About the victim

AI dossier — public-source company profile

Mediaworks Hungary Zrt. is a major Hungarian media conglomerate operating a wide portfolio of digital news portals, print publications, magazines, regional media, and linear broadcast content. The company reaches approximately 5 million monthly visitors and over 6.8 million social media followers, with around 260,000 subscribers. It is consistently among the top online publishers in Hungary, reaching over 2.1 million daily users.

Industry: Media Publishing & Digital Content

Attack summary

Severity: high — The company has publicly confirmed a data protection incident involving PII of multiple categories of data subjects (subscribers, employees, partners), and the status is 'data_published', indicating actual exfiltration and release of personal data at scale from a major national media operator.

The worldleaks group claims to have obtained and published data belonging to Mediaworks Kft; the company itself has issued a public data breach notice on its website acknowledging a data protection incident affecting partners, sweepstakes participants, former subscribers, and former employees.

high

Data the group says was taken

AI dossier — extracted from the leak post

Partner data
Sweepstakes/competition participant data
Former subscriber personal data
Former employee records

Original description

AI-summarised, not from the leak post

N/A

Sources

Victim sitewww.mediaworks.hu
Leak posthttps://worldleaksartrjm3c6vasllvgacbi5u3mgzkluehrzhk2jz4taufuid.onion/companies/4804786538

Source

Indexed 22 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.