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Mytheresa

shinyhunters

This record tracks a ransomware attack claimed by the shinyhunters group against Mytheresa. It collects the publicly disclosed attack details — sector, location and timeline — as published on the operator's leak site and indexed by Breach House.

Window Zero

EXPOSURE GAP

Window Zero is the time the breach stayed in the open before anyone said so — the gap between when the attack was first discovered on the operator's leak site (t1) and when it was publicly disclosed (t2). The wider this window, the longer victims, staff and customers were exposed with no warning.

66days open
t1 · Published t2 · Pending
Apr 11, 2026Not disclosed yet
Country
Germany
Business Category
Retail / E-commerce
Employees
+1000
Discovered
2026-04-12
Published
April 11, 2026
Disclosed / Notified
Not disclosed yet
Victim ID
6UPDRoEE4Pam

Attack Summary

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

Leak Screenshots

SAMPLE

Proof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.

file_tree.png
finance_2024.xlsx
passport_scan.jpg
contract_signed.pdf
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Dark Web Exposure

Cross-referenced against HaveIBeenRansom's dark-web index of ransomware leaks, breaches & infostealer logs.
0
found in Infostealer logs
0
found in Traditional breaches
0
found in Ransomware leaks
Emails exposed
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Internal
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External
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Distinct leaks
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••• emails
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••• emails
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••• emails
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••• emails
Full exposure is locked
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View Group: shinyhunters

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Legal Disclaimer: This ransomware victim record reflects information published on the operator's leak site. Breach.house does not acquire, download, host, access or redistribute unlawfully obtained data. It indexes only publicly visible information posted by ransomware, breach and infostealer operators and open web sources, without accessing the underlying stolen content. The service supports public awareness, legitimate research and cyber-resilience.