This record tracks a ransomware attack claimed by the
worldleaks group against
Thames Valley Chamber of Commerce. 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.
-54days
t1 · Published
t2 · Disclosed
Business Category
Services
Published
February 16, 2026
Disclosed / Notified
Dec 25, 2025
Attack Summary
[AI generated] The Thames Valley Chamber of Commerce Group is a crucial networking, business support, and lobbying organization for businesses and organizations operating within the Thames Valley region in the United Kingdom. It aims to promote profitable business relationships among members and ensure sustainable economic growth in the region. This chamber hosts networking events, provides training and consultation, among various other services.
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 thamesvalleychamber.co.uk
— indexed by HaveIBeenRansom.
1
found in Infostealer logs
246+
found in Traditional breaches
11+
found in Ransomware leaks
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
29 Leaks
ddosecret · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
Onclusive
play · ransomware
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · 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.