Disclosure context

About shinyhunters

Based on the limited publicly available information, shinyhunters appears to be a recently emerged ransomware group first observed in October 2025, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group's origin and potential affiliations remain unclear due to their recent emergence, and there is insufficient public documentation to determine whether they operate as a Ransomware-as-a-Service model or as an independent entity. Their attack methodology and specific technical capabilities have not been extensively documented by major threat intelligence firms, though their targeting pattern suggests a broad opportunistic approach rather than sector-specific specialization. The group has reportedly victimized approximately 77 organizations, with primary targeting focused on the United States, France, Japan, Germany, and Australia, showing particular interest in consumer services, technology, financial services, transportation and logistics, and education sectors. Given the group's very recent emergence in late 2025, there are no widely reported major campaigns or high-profile incidents documented by established security research organizations, and no known law enforcement actions have been publicly reported against this group. The current operational status of shinyhunters remains active based on available reporting, though comprehensive threat intelligence profiles from major security firms like Mandiant, CrowdStrike, or government agencies have not yet been published due to the group's recent appearance in the threat landscape. The group has been linked to 108 public disclosures across our corpus. First observed on a leak site on October 3, 2025; most recent post May 12, 2026. The operation is currently active.

Timeline of this disclosure

April 12, 2026Mytheresa listed by shinyhunterson the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Consumer Services sector, which has 396 disclosures indexed across all operators we track. Geographically, Mytheresa is reported in DE, a country with 333 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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Mytheresa

Claimed by shinyhunters · listed 1 month ago

39d

Age

since listed · data leaked

Status timeline

Listed
Apr 12, 2026
Data leaked

At a glance

Group: shinyhunters
Status: Data leaked
Country: DE
Sector: Consumer Services
Listed on leak site: Apr 12, 2026

About the victim

AI dossier — public-source company profile

Mytheresa is a Germany-based luxury online fashion retailer headquartered in Munich, offering high-end clothing, shoes, and accessories from top designer brands to customers worldwide. The company operates a global e-commerce platform and is publicly listed on the NYSE. It serves a high-net-worth consumer base across multiple countries.

Industry: Luxury Fashion E-Commerce
Employees: 501-1000
Founded: 2006

Attack summary

Severity: critical — ShinyHunters claims exfiltration of customer PII at scale from a global luxury e-commerce platform with a large international customer base, constituting regulated personal data exposure (GDPR-covered) with transactional/financial history included, meeting the threshold for critical severity.

ShinyHunters claims to have exfiltrated sensitive customer PII and transactional history data from Mytheresa, issuing a final warning with a deadline of 14 April 2026 to pay or face public data leakage along with additional unspecified digital disruption.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Customer personally identifiable information (PII)
Transactional history data
Purchase records

What the group claims

Sensitive customer PII data and transactional history data was compromised. Pay or leak. This is a final warning to reach out by 14 Apr 2026 before we leak along with several annoying (digital) problems that'll come your way. Make the right decision, don't be the next headline. | Updated: 11 Apr 2026 | Warning: FINAL WARNING PAY OR LEAK

Source

Indexed 1 month 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.