This record tracks a ransomware attack claimed by the
qilin group against
Composition Systems. 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.
-90days
t1 · Published
t2 · Disclosed
Business Category
Services
Disclosed / Notified
Dec 12, 2025
Attack Summary
Composition Systems is listed as a victim of the qilin ransomware operation. It operates in the Services sector. The affected entity is based in United States. The incident was first observed on March 11, 2026. Breach House catalogues this incident from publicly available leak-site data; no stolen files are hosted here.
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 csi2.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
308+
found in Traditional breaches
38+
found in Ransomware leaks
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Access Intelligence
play · ransomware
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.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
Arandell Corp
medusa · ransomware
••• 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.