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Instituut voor de Nederlandse

thegentlemen

This record tracks a ransomware attack claimed by the thegentlemen group against Instituut voor de Nederlandse. 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.

109days open
t1 · Published t2 · Pending
May 14, 2026Not disclosed yet
Country
Netherlands
Business Category
Other
Employees
51-100
Discovered
2026-05-15
Published
May 14, 2026
Disclosed / Notified
Not disclosed yet
Victim ID
dHG40kkIc2FR

Attack Summary

ivdnt.org rocketreach.co/instituut-voor-de-nederlandse-taal-profile_b45f686efc6979e6 It advances the study and preservation of Dutch through cutting-edge research, digital tools, and open-access resources covering vocabulary, grammar, dialects, and terminology. The institute curates authoritative references like the Algemene Nederlandse Spraakkunst for scholars, educators, and language enthusiasts worldwide

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

Findings for ivdnt.org — indexed by HaveIBeenRansom.
5
found in Infostealer logs
1
found in Traditional breaches
0
found in Ransomware leaks
linkedIN_2.7z.001
Database World ROC · breach
••• emails
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