This record tracks a ransomware attack claimed by the
qilin group against
ZEF. 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.
20days
t1 · Published
t2 · Disclosed
Business Category
Education
Published
August 01, 2025
Disclosed / Notified
Aug 21, 2025
Attack Summary
ZEF, Germany - Center for Development Research University of Bonn. ZEF conducts interdisciplinary research in the fields of political, economic, and general development. The institute advises governments, national and international organizati ...
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 zef.de
— indexed by HaveIBeenRansom.
20
found in Infostealer logs
5
found in Traditional breaches
0
found in Ransomware leaks
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Deezer_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
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.