Communitymosaic.co.uk Listed by tengu Ransomware Group

On March 4, 2026, the British community organisation Community Mosaic Cic appeared on the leak site of the tengu ransomware group, with attackers claiming to have exfiltrated internal files during a ransomware incident.

Reported Details of the Breach

Public reporting indicates that Community Mosaic Cic, a community interest company incorporated on 21 June 2018 and based in Peterborough, Cambridgeshire, was listed by the tengu group. The organisation had been operating for roughly seven years at the time of the incident. Available reporting describes the data involved as internal files exfiltrated during a ransomware attack, although the exact volume and full list of records remain unconfirmed in open sources. No specific victim count has been published, and the company has not yet issued a detailed public statement on the scope of the exposure.

Why This Matters for You and Your Family

When a local community organisation suffers a breach, the ripple effects often reach ordinary people who interacted with it. If you or your family attended events, received support services, volunteered, or supplied personal details such as names, addresses, phone numbers, email addresses or dates of birth, that information may now sit in an attacker-controlled archive. Internal files frequently contain spreadsheets of beneficiaries, donor records, staff contact lists and correspondence that can be pieced together with data from other breaches. Once combined, these fragments create a detailed picture of your household that criminals can exploit for identity theft, phishing or harassment.

The Doxxing and Identity-Chain Risks

Ransomware operators rarely stop at the initial theft. They increasingly chain stolen data across platforms to build full identity profiles. An email address leaked from a community group can be matched to gaming accounts, social-media handles or family photos, turning a single breach into a doxxing vector. Credential leaks of this nature frequently cascade into account takeovers, especially for gaming platforms used by children. A compromised parent account can expose a child’s username, chat logs and linked email, giving attackers persistent access and new avenues for extortion or harassment. Public reporting shows these identity chains grow faster than most people realise, often linking back to the same residential address or phone number used with the original organisation.

Tengu Ransomware Group’s Known Activity

Public reporting attributes the attack to the tengu ransomware group. The group emerged in recent years and has targeted a range of organisations, typically gaining initial access through common vectors such as phishing or unpatched remote desktop services. Once inside, they exfiltrate sensitive files before deploying ransomware. Their playbook usually ends with publication on their leak site when victims do not pay, applying pressure through the threat of further data release. Exact details of their previous victims and success rate vary across reports, but the pattern of exfiltration followed by public shaming is consistent in available sources.

What to do

• Run a DoxxScan to map every link between your emails, phone numbers, handles and real-world identity so you can see exactly what chains back to the Community Mosaic breach.
• Rotate any password you used on communitymosaic.co.uk or related services, then enable two-factor authentication through an authenticator app rather than SMS.
• Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next leak exposing you or your family is flagged within hours instead of months.
• Cover the household with DoxxScan family protection, which extends to children’s gaming accounts that often chain back to the same address or parent email.
• Let remediation specialists handle takedown requests for any exposed personal records that surface on data-broker or doxxing sites.

The incident underscores a simple reality: data stolen from one organisation can quietly surface in attacks on your personal accounts months or years later. Starting with a clear map of your exposure and maintaining ongoing vigilance gives you the best chance of staying ahead of these expanding threat chains. DoxxScan by GalaxyWarden delivers continuous monitoring across 13.1 billion+ breach records and more than 100 platforms, AI-powered identity-chain mapping, and hands-on remediation by specialists, with household coverage that includes children’s gaming accounts.