This record tracks a ransomware attack claimed by the
medusa group against
Expert E-commerce GmbH. 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.
-87days
t1 · Published
t2 · Disclosed
Business Category
Retail / E-commerce
Published
August 17, 2025
Disclosed / Notified
May 23, 2025
Attack Summary
Expert E-commerce GmbH is a company specializes in E-commerce Services. It offers services that provide the participating specialist stores of the expert group (Expert SE) via online support. The company was formed in 1999 and is based in Langenhagen, Germany. The total amount of data leakage is 114 GB
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.
Dark Web Exposure
Findings for expert.de
— indexed by HaveIBeenRansom.
1,842
found in Infostealer logs
293+
found in Traditional breaches
116+
found in Ransomware leaks
LOGITECH.COM
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••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
MGM_Grand_Hotels RUTOR.7z
TheUnderground - Reborn · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
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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.