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Leak-site post naming Marlborough Partners, captured by ThreatCluster
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Marlborough Partners

anubis

Ransomware leak-site victim intelligence

Data size
892 GB
Posted
Sep 2, 2026
Country
GB
Industry
Financial

Summary

Written by ThreatClusterfrom victim profile, leak post

Anubis states Marlborough Partners, a financial-sector capital solutions advisory firm, suffered a major data breach with 892 GB of data claimed to be exposed. The leak post is published and states Marlborough Partners is the victim. The material is said to include HR and recruitment records, internal documentation and source code.

Describes what the group claims on its leak site. A listing is not confirmation that a breach occurred.

Victim profile

Domains
www.marlboroughpartners.com

What was taken

Major data breach at a capital solutions advisory firm.

Data categories
client financial informationdocuments related to various dealsdetails on capital raised and investorsKYC recordsidentity documentsinformation on clients and investors

Leak-site images (11)

Images from the victim's leak listing. Thumbnails scraped from the onion page are blurred by default — click a thumbnail to view.

ThreatCluster capture
Screenshot of a table listing investment firms, including columns for investor type, primary investor type, and status.
onion leak page584 KB
Screenshot of a financial report with columns for various monetary values, including totals and comments, marked with a watermark.
onion leak page470 KB
Screenshot of a data table listing companies with columns for Name, Country, Industry, and various financial metrics, partially obscured by a watermark.
onion leak page671 KB
Screenshot of a table listing contacts with columns for Name, Email, Phone, and Client Status, overlaid with a watermark.
onion leak page254 KB
Screenshot of a spreadsheet listing contacts with names, companies, phone numbers, and email addresses, overlaid with a logo.
onion leak page447 KB
Screenshot of a table listing various lenders, including columns for Leader Type, Contact Name, Phone Number, Email, and Comments.
onion leak page371 KB
Screenshot of a table listing contacts with columns for Name, Telephone, Mobile, Email, and Comments, partially obscured by a watermark.
onion leak page593 KB
Screenshot of a table listing names, companies, phone numbers, and email addresses.
onion leak page287 KB
Screenshot of a table listing names, companies, phone numbers, and email addresses.
onion leak page287 KB
Screenshot of a document listing names, companies, and contact information, including phone numbers and email addresses.
onion leak page293 KB