This record tracks a ransomware attack claimed by the
coinbasecartel group against
Jozef Stefan Institute (IJS). 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.
-32days
t1 · Published
t2 · Disclosed
Business Category
Manufacturing / Engineering
Disclosed / Notified
Apr 10, 2026
Attack Summary
[AI generated] Jozef Stefan Institute (IJS) is Slovenia's leading research institution, headquartered in Ljubljana. It operates across multiple scientific disciplines including physics, chemistry, biochemistry, electronics, information technology, and environmental sciences. Founded in 1949, it conducts fundamental and applied research, hosts numerous national and international projects, and collaborates with academic and industrial partners. It also plays a key role in educating postgraduate researchers in Slovenia.
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 ijs.si
— indexed by HaveIBeenRansom.
43
found in Infostealer logs
2,433+
found in Traditional breaches
71+
found in Ransomware leaks
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
+ 17 more leak sources 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.