This record tracks a ransomware attack claimed by the
rhysida group against
St Edmund's College & Prep School. 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.
-44days
t1 · Published
t2 · Disclosed
Business Category
Education
Published
November 21, 2023
Disclosed / Notified
Oct 09, 2023
Attack Summary
St Edmund's College & Prep School Located in 400 acres of beautiful Hertfordshire countryside, St Edmund's College and Prep School is a safe, stimulating environment for students aged 3-18, with boarding available from age 11.
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 stedmundscollege.org
— indexed by HaveIBeenRansom.
8
found in Infostealer logs
400+
found in Traditional breaches
15+
found in Ransomware leaks
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
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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.