This record tracks a ransomware attack claimed by the
d4rk4rmy group against
ONEX CANADA ASSET MANAGEMENT INC. 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.
-84days
t1 · Published
t2 · Disclosed
Business Category
Communication / Marketing
Published
August 07, 2025
Disclosed / Notified
May 16, 2025
Attack Summary
https://onex.com Onex Partners is a private equity platform focused on the upper-middle market in the United States, Canada, and Europe. Our successful track record is built on deep sector specialization and a disciplined, hands-on approach to private equity investing. they…
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 onex.com
— indexed by HaveIBeenRansom.
32,499
found in Infostealer logs
2,634+
found in Traditional breaches
366+
found in Ransomware leaks
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
SevenRooms_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
CSCGLOBAL.COM
clop · ransomware
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
Televerde
play · ransomware
••• 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.