This record tracks a ransomware attack claimed by the
lockbit3 group against
tdsb.on.ca. 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.
-89days
t1 · Published
t2 · Disclosed
Business Category
Education
Published
August 29, 2024
Disclosed / Notified
Jun 02, 2024
Attack Summary
The Toronto District School Board, also known under the acronym of TDSB, is the largest school Board in Canada and the fourth largest in North America
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 tdsb.on.ca
— indexed by HaveIBeenRansom.
3,255
found in Infostealer logs
2,956+
found in Traditional breaches
44+
found in Ransomware leaks
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Canva_BF_.7z.001
Database World ROC · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Dropbox_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
Edmodo_BF.7z
Formaceft db · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 20 sources.
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.