Was Manchester Credit Union hit by ransomware?

Manchester Credit Union was listed by the Sarcoma ransomware operation (United Kingdom), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Sarcoma ransomware group?

Sarcoma is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Manchester Credit Union breach?

Sarcoma published data attributed to Manchester Credit Union (~6 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Manchester Credit Union

Claimed by Sarcoma · listed 1 year ago

6 GB

Data size

15m

Age

since listed · data leaked

Status timeline

ListedApr 17, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: United Kingdom
Sector: Financial Services
Listed on leak site: Apr 17, 2025
Data size: 6 GB

About the victim

AI dossier — public-source company profile

Manchester Credit Union is a community-focused financial services organization in the United Kingdom offering personal loans, savings accounts, and financial literacy programs. With over 30,000 members, it operates on a cooperative model where members hold ownership shares and earn dividends.

Industry: Financial Services – Credit Union

Attack summary

Severity: critical — Confirmed exfiltration of 6 GB from a financial institution with 30,000+ members; exposure includes SQL databases and financial records representing regulated PII and sensitive banking data at significant scale.

Sarcoma claims to have exfiltrated 6 GB of data from Manchester Credit Union, including files and SQL databases. The group has published the data.

critical

Data the group says was taken

AI dossier — extracted from the leak post

SQL databases
Member financial records
Loan application files
Personal customer information

What the group claims

Manchester Credit Union Manchester Credit Union offers ethical and affordable financial services, including personal loans and savings opportunities, catering primarily to local residents. The organization emphasizes community involvement, providing members with a share in ownership and earning dividends on their savings. They also offer a mobile app for convenient money management, and various educational initiatives aimed at promoting financial literacy. With over 30,000 members, the credit union is committed to supporting individuals and communities while keeping financial services accessible.Geo: United Kingdom - Leak size: 6 GB Archive - Contains: Files,SQL

Source

Indexed 1 year ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Sarcoma

Sarcoma is a relatively new ransomware group that emerged in October 2024, operating with apparent financial motivations and demonstrating a broad international targeting approach with at least 140 documented victims across multiple countries and industry sectors. The group's origin and affiliations remain unclear due to its recent emergence, with no publicly documented connections to established ransomware families or confirmation of whether they operate as an independent entity or through a Ransomware-as-a-Service model. Limited public information is available regarding Sarcoma's specific attack methodologies, initial access vectors, or technical capabilities, though their targeting patterns suggest opportunistic rather than highly selective victim selection across diverse industries including manufacturing, business services, agriculture and food production, and technology sectors. The group has shown a particular focus on victims in the United States while also maintaining operations against targets in Italy, Canada, Germany, and Australia, though no specific high-profile attacks or record ransom demands have been publicly documented by major security firms or law enforcement agencies. Given the group's recent emergence in late 2024, Sarcoma appears to remain active with no reported law enforcement disruptions or confirmed rebranding activities at this time. The group has been linked to 150 public disclosures across our corpus. First observed on a leak site on October 9, 2024; most recent post May 12, 2026. The operation is currently active.

Also tracked as: Sarcoma Ransomware Group.

Timeline of this disclosure

April 17, 2025Manchester Credit Union listed by Sarcomaon the group's public leak site

Data size: 6 GB

Other recent disclosures by Sarcoma

Sarcoma has been linked to 150 public victims on Darkfield. A sample of the most recent:

See the full Sarcoma dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 1,184 disclosures indexed across all operators we track. Geographically, Manchester Credit Union is reported in United Kingdom, a country with 1,217 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Manchester Credit Union appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, NCSC (United Kingdom), as required for your jurisdiction.
Monitor for the data appearing on Sarcoma's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.