This record tracks a ransomware attack claimed by the
coinbasecartel group against
Marlborough Partners. 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.
174days
t1 · Published
t2 · Disclosed
Business Category
Finance / Legal / Insurance
Published
August 25, 2025
Disclosed / Notified
Feb 16, 2026
Attack Summary
[AI generated] Marlborough Partners is a UK-based independent corporate finance advisory firm specialising in mergers and acquisitions, private equity transactions, and strategic advisory services. The firm primarily works with mid-market companies, providing guidance on buyouts, disposals, fundraising, and growth strategies. It operates within the financial services and investment banking sector, serving clients across Europe and beyond.
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 marlboroughpartners.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
32+
found in Traditional breaches
0+
found in Ransomware leaks
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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.