This record tracks a ransomware attack claimed by the
coinbasecartel group against
Helzberg. 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.
-33days
t1 · Published
t2 · Disclosed
Business Category
Retail / E-commerce
Disclosed / Notified
Mar 11, 2026
Attack Summary
[AI generated] Helzberg Diamonds is a American retail jewelry company headquartered in North Kansas City, Missouri. Founded in 1915, it operates a chain of jewelry stores across the United States, selling diamonds, engagement rings, wedding bands, and fine jewelry. The company is a subsidiary of Berkshire Hathaway, having been acquired in 1995. Helzberg operates hundreds of retail locations in shopping malls and centers nationwide.
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 helzberg.com
— indexed by HaveIBeenRansom.
230
found in Infostealer logs
2,780+
found in Traditional breaches
220+
found in Ransomware leaks
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Kedr | Forum · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
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••• emails
Factual_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
CSCGLOBAL.COM
clop · ransomware
••• emails
contacts_6.csv
Database World ROC · breach
••• emails
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shinyhunters · 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.