This record tracks a ransomware attack claimed by the
qilin group against
Cooperativa de Hospitales de Antioquia - COHAN. 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.
-46days
t1 · Published
t2 · Disclosed
Business Category
Healthcare / Pharma
Disclosed / Notified
Mar 06, 2026
Attack Summary
The organization Cooperativa de Hospitales de Antioquia - COHAN appears on the qilin ransomware leak site. It operates in the Healthcare / Pharma sector and is estimated to employ around +1000 people. The affected entity is based in Colombia. The incident was first observed on April 20, 2026. This record is maintained by Breach House as part of its ongoing monitoring of public ransomware leak sites.
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 cohan.org.co
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
183+
found in Traditional breaches
11+
found in Ransomware leaks
VivaAir Colombia.txt
Database World ROC · breach
••• emails
Fiduagraria
medusa · ransomware
••• emails
Canva_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
LinkedIn.com.txt
Database World ROC · breach
••• emails
Canva_BF_.7z.001
Database World ROC · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
+ 8 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.