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Cyber Threat
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Ransomware victim Financial Services

Marlborough Partners

Listed by Anubis on · organisation based in United Kingdom

Disclosed
Sep 2, 2026
Leak-site listing date
Threat group
Anubis
122 victims listed
Country
United Kingdom
#4 most targeted
Sector
Financial Services

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Anubis. Figures and technique mappings are quoted from the source data, not inferred.

Anubis, a ransomware-as-a-service group listed Marlborough Partners on its dark web leak site on 2 September 2026; the Financial Services firm is based in United Kingdom.

About the Anubis group

Anubis is a ransomware-as-a-service group active since December 2024 that targets healthcare, engineering, construction, and professional services sectors, offering affiliates a flexible revenue split model and an optional destructive "wipe mode" alongside standard encryption. Anubis has listed 113 victims since February 2025.

Incident analysis

Marlborough Partners was listed by Anubis ransomware, a group with 122 victims recorded in this database. The listing appeared on the group's leak site on September 2, 2026.

Marlborough Partners is based in United Kingdom and operates in the Financial Services sector. United Kingdom ranks #4 worldwide for ransomware disclosures, with 967 victims in this database.

Sector context. Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Anubis typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was Marlborough Partners attacked by ransomware?

Yes. Marlborough Partners was listed as a victim of the Anubis ransomware group on September 2, 2026. The organisation is based in United Kingdom and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Marlborough Partners?

Marlborough Partners was attacked by Anubis ransomware. Anubis is one of the most active ransomware groups, having claimed 122 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Marlborough Partners ransomware attack occur?

The ransomware attack on Marlborough Partners was disclosed on September 2, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Marlborough Partners ransomware attack?

The specific data stolen from Marlborough Partners has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Financial Services organisation, Marlborough Partners likely held financial records, client data, and transaction histories.

How can organisations protect against Anubis attacks?

To defend against Anubis and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.