This record tracks a ransomware attack claimed by the
rhysida group against
Cytek Biosciences. 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.
223days open
t1 · Published
t2 · Pending
Business Category
Services
Published
January 25, 2026
Leak Status
leaked
checked 2026-09-05
Disclosed / Notified
Not disclosed yet
Attack Summary
Cytek Biosciences Cytek Biosciences is a leading cell analysis solutions company founded in 1992 and headquartered in Fremont, California with global offices across North America, Europe, and Asia. Sold 0% All data was sold, stay with us, we will upload new Companies later More
Leak Screenshots
3 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-09-05. Verdict evidence: [H6] All files was uploaded to public access, data hunters, enjoy
Proof files published by the operator —
2 image(s) harvested from this entry.
Content is locked; type and dimensions shown.
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Dark Web Exposure
Findings for cytekbio.com
— indexed by HaveIBeenRansom.
20
found in Infostealer logs
322
found in Traditional breaches
36
found in Ransomware leaks
pureincubation-com.7z.001
Database World ROC · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
parkmobile.io.7z
Leaks Aggregator @sqan7 · breach
••• emails
Database World ROC · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
+ 17 more leak sources locked
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