This record tracks a ransomware attack claimed by the
worldleaks group against
Herman & Chamow. 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
Finance / Legal / Insurance
Published
November 14, 2025
Disclosed / Notified
Sep 03, 2025
Attack Summary
[AI generated] "Herman & Chamow" is a certified public accounting firm based in California. Its primary services revolve around auditing, accounting, and tax-related matters. The firm provides assistance to private clients and business entities on making sound financial decisions, helping them achieve their financial goals. The company is committed to maintaining the highest standards of integrity and professionalism.
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 rhccpa.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
128+
found in Traditional breaches
0+
found in Ransomware leaks
Neiman Marcus_.7z.001
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
AT&T 5 Million Leaked Database.7z
Database World ROC · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
USA_Customers_04.2021_(153.986.518) @dbworldcloud.part01.rar
DBs Backup · breach
••• emails
extracted_emails.txt
DL| Database catalog · breach
••• emails
+ 17 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.