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St Stephen's International

thegentlemen

This record tracks a ransomware attack claimed by the thegentlemen group against St Stephen's International. 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.

224days open
t1 · Published t2 · Pending
Nov 04, 2025Not disclosed yet
Country
Thailand
Business Category
Education
Employees
101-1000
Discovered
2025-11-04
Published
November 04, 2025
Disclosed / Notified
Not disclosed yet
Victim ID
5HpWD6zhVmlW

Attack Summary

www.sis.edu https://www.zoominfo.com/c/st-stephens-international-school/1293733677 St Stephen's International School offers educational programs at its Bangkok and Khao Yai campuses, catering to a diverse student population. The school provides weekend schooling and various camps for groups, aiming to enhance the educational experience. It is associated with several organizations including Ocean Glass, Ocean Property, and Bandara Group. The institution focuses on fostering an international learning environment for its students.

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.
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found in Infostealer logs
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found in Traditional breaches
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found in Ransomware leaks
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Full exposure is locked
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