This record tracks a ransomware attack claimed by the
shinyhunters group against
McGraw Hill, Inc. (mheducation.com). 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.
-42days
t1 · Published
t2 · Disclosed
Business Category
Education
Disclosed / Notified
Mar 01, 2026
Attack Summary
Over 45M Salesforce records containing PII data have been compromised. Pay or leak. This is a final warning to reach out by 14 Apr 2026 before we leak along with several annoying (digital) problems that'll come your way. Make the right decision, don't be the next headline. | Updated: 11 Apr 2026 | Warning: FINAL WARNING PAY OR LEAK
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 mheducation.com
— indexed by HaveIBeenRansom.
52,701
found in Infostealer logs
2,860+
found in Traditional breaches
140+
found in Ransomware leaks
McGraw Hill, Inc. (mheducation.com)
shinyhunters · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
Televerde
play · ransomware
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
123RF_BF.7z
TheUnderground - Reborn · 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.