St Stephens International Listed by thegentlemen Ransomware Group
If you are a customer of St Stephens International, here’s what is being claimed, and what it would mean for you.
www.sis.edu St Stephens 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
— from The Gentlemen’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.
Editor’s note: The claims described below originate from a ransomware group’s leak-site posting and have not been independently verified by GalaxyWarden. A listing of this kind is an assertion made by the group during an extortion attempt. It is not evidence that a breach occurred, and we report it as a claim rather than as a finding.
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On November 4, 2025, St Stephens International School in Thailand appeared on the leak site of the ransomware group known as thegentlemen. The listing indicates that internal files were exfiltrated during a ransomware attack on the international school, which serves families at its Bangkok and Khao Yai campuses.
What's Publicly Reported from Reporting
Public reporting on the ransomware.live portal shows the school was listed after failing to meet the group’s demands. The exposed material consists of internal files taken from the institution’s systems. No exact victim count has been published, and the precise volume or sensitivity of the documents remains unclear from available information. The school’s website confirms it provides education to a diverse student body, including weekend programs and camps, and maintains ties to several Thai business groups.
Why This Matters for You and Your Family
When a school’s internal files are stolen, the information often includes details that can identify students, parents, staff, and their families. Names, contact information, addresses, dates of birth, and sometimes financial or medical records tied to enrollment can appear in such leaks. Once released, this data does not disappear. It can be sold, reposted, or combined with other breaches to build profiles on you and your children. For any parent whose child attends or has attended the school, the breach represents a permanent increase in exposure.
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The Doxxing and Identity-Chain Implications
Ransomware leaks rarely stop at one dataset. Attackers and subsequent buyers frequently link leaked school records to social-media handles, gaming accounts, phone numbers, and family addresses. This creates an identity chain that can lead to doxxing, targeted harassment, or follow-on fraud. Credential leaks like this one cascade into account takeovers, especially when parents or children reuse passwords across school portals, email, and gaming platforms. Children’s gaming accounts are particularly vulnerable because they often share the same household email or phone number listed in school files.
thegentlemen Group’s Known Track Record
Public reporting attributes the attack to the ransomware group thegentlemen. The group emerged in recent years and has targeted organizations across multiple sectors. Its typical playbook involves gaining initial access, exfiltrating data before encryption, and then publishing samples on its leak site when victims do not pay by the stated deadline. Past incidents show the group posts increasingly large portions of stolen data until the target negotiates or the files are fully released. Exact prior victims vary, but the pattern of double extortion—demanding payment to prevent publication—remains consistent.
What to do
- Run a DoxxScan to map every link between your family’s emails, phone numbers, handles, and real-world identities drawn from this and earlier breaches.
- Rotate any password used at the school or associated services anywhere it has been reused, and enable two-factor authentication through an authenticator app rather than SMS.
- Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next exposure surfaces in hours instead of months.
- Cover the entire household with DoxxScan family protection, which includes dependents and children’s gaming accounts that often chain back to the same leaked address or parent email.
- Let remediation specialists handle takedown requests for any exposed personal documents or broker listings that surface from this incident.
The incident underscores a simple reality: once internal school records reach a ransomware leak site, your family’s information is permanently at higher risk. Acting quickly on passwords, monitoring, and removal requests can limit how far the chain extends. DoxxScan by GalaxyWarden delivers continuous monitoring across 13.1 billion+ breach records and more than 100 platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage that includes children’s gaming accounts. Starting these steps now gives you concrete control over what happens next with your family’s data.
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For security and vendor-risk teams: a staff address in a leak does not mean you were breached — it usually means a third party was. We monitor a domain against 13.1B+ leaked records and tell you when one of your people appears. See what we would check →
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