This record tracks a ransomware attack claimed by the
lockbit3 group against
unimed.coop.br. 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.
-73days
t1 · Published
t2 · Disclosed
Business Category
Healthcare / Pharma
Published
November 03, 2023
Disclosed / Notified
Aug 23, 2023
Attack Summary
Unimed is a Brazilian medical work cooperative and health insurance operator. It is considered the largest of its kind in the world, with more than 105,000 affiliated physicians, 386 branches and more than 15 million beneficiaries. Its name is a comp...
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 unimed.coop.br
— indexed by HaveIBeenRansom.
18,787
found in Infostealer logs
2,993+
found in Traditional breaches
7+
found in Ransomware leaks
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
Unimed do Brasil
sarcoma · breach
••• emails
contacts_80.csv
Database World ROC · breach
••• emails
contacts_82.csv
Database World ROC · breach
••• emails
EstanteVirtual_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
TAPAir_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.