This record tracks a ransomware attack claimed by the
dragonforce group against
Mastery Schools. 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.
-63days
t1 · Published
t2 · Disclosed
Business Category
Education
Published
October 25, 2024
Disclosed / Notified
Aug 24, 2024
Attack Summary
Founded in 2001, Mastery Charter Schools is a charter school network in Philadelphia, Pennsylvania and Camden, New Jersey.
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 masterycharter.org
— indexed by HaveIBeenRansom.
31
found in Infostealer logs
2,970+
found in Traditional breaches
30+
found in Ransomware leaks
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
McGraw Hill, Inc. (mheducation.com)
shinyhunters · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
Edmodo_BF.7z
Formaceft db · breach
••• emails
Canva_BF_.7z.001
Database World ROC · breach
••• emails
+ 17 more leak sources 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.