This record tracks a ransomware attack claimed by the
thegentlemen group against
Kozminski University. 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.
4days open
t1 · Published
t2 · Pending
Business Category
Education
Disclosed / Notified
Not disclosed yet
Attack Summary
***.edu.pl zoominfo.com/c/kozminski-university/372606592 Kozminski University, located in Warsaw, is Poland's premier private business school and a globally recognized academic institution holding the prestigious "Triple Crown" accreditation. Consistently ranked among the top European business schools by the Financial Times, it specializes in management, finance, and law. The university is dedicated to shaping future business leaders through innovative, research-driven education and strong international partnership
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 kozminski.edu.pl
— indexed by HaveIBeenRansom.
111
found in Infostealer logs
717+
found in Traditional breaches
12+
found in Ransomware leaks
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
Canva_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Canva_BF_.7z.001
Database World ROC · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 20 sources.
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.