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Kozminski University

thegentlemen

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.

1day open
t1 · Published t2 · Pending
Jun 15, 2026Not disclosed yet
Country
Poland
Business Category
Education
Employees
101-1000
Discovered
2026-06-15
Published
June 15, 2026
Disclosed / Notified
Not disclosed yet
Victim ID
3fRCpHSR0XKM

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.

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
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found in Traditional breaches
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found in Ransomware leaks
Emails exposed
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••• emails
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