Was arunestates.co.uk hit by ransomware?

arunestates.co.uk was listed by the blackbasta 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 blackbasta ransomware group?

blackbasta 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 arunestates.co.uk breach?

blackbasta published data attributed to arunestates.co.uk (~1.5 TB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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arunestates.co.uk

Claimed by Blackbasta · listed 1 year ago

1.5 TB

Data size

17m

Age

since listed · data leaked

Status timeline

ListedJan 11, 2025
Data leakeddate unknown

At a glance

Group: Blackbasta
Status: Data leaked
Country: United Kingdom
Sector: Business Services
Listed on leak site: Jan 11, 2025
Data size: 1.5 TB

About the victim

AI dossier — public-source company profile

Arun Estates is an independent estate agency established in 1991, operating over 100 branches across the South East of England under multiple trading brands. The company provides residential sales, lettings, financial services, conveyancing, and land development services.

Industry: Real Estate & Property Services
Address: St. Leonard's House, North Street, Horsham, West Sussex RH12 1RJ, United Kingdom
Employees: 100+
Founded: 1991

Attack summary

Severity: high — Confirmed exfiltration of 1.5 TB including regulated personal data (employee and customer PII), financial records, and confidential business documents from a large multi-branch operation. Data has been published.

Black Basta claims to have exfiltrated approximately 1.5 TB of data from Arun Estates' systems, including financial records, employee personal data, client information, and confidential business documents.

high

Data the group says was taken

AI dossier — extracted from the leak post

Financial data and accounts
Human resources records
Employee home folders and personal documents
Client and customer personal data and documents
Confidential documents and NDAs
Branch data

What the group claims

Arun Estates is an independent estate agency based in the South East of England, established in 1991. It operates over 100 branches under multiple trading brands, making it one of the largest independent estate agents in the region. The company specializes in a variety of property services, including residential sales, lettings, financial services, conveyancing, and land development.SITE: www.arunestates.co.ukADDRESS: St. Leonard’s House North Street Horsham, West Sussex RH12 1RJ, United KingdomTEL#: +44 1403 282400ALL DATA SIZE: ≈1.5tb+ 1. Financial data, Accounts 2. Human Resources 3. Home folders, Personal employees data and documents 4. Personal clients(customers) data and documents 5. Confidential documents, NDA’s… 6. Branch data… & etc…

Sources

Victim sitearunestates.co.uk
Leak posthttp://stniiomyjliimcgkvdszvgen3eaaoz55hreqqx6o77yvmpwt7gklffqd.onion/?id=arunestates.co.uk

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 blackbasta

Black Basta is a financially motivated ransomware group that emerged in April 2022 and has rapidly established itself as a significant threat actor, compromising over 500 organizations globally within its first two years of operation. The group is suspected to have ties to Russia-based cybercriminal networks and operates as a Ransomware-as-a-Service (RaaS) model, recruiting affiliates to conduct attacks while the core group maintains the ransomware infrastructure and negotiates with victims. Black Basta primarily gains initial access through phishing campaigns, exploitation of unpatched vulnerabilities, and compromised Remote Desktop Protocol (RDP) credentials, then deploys custom tools and living-off-the-land techniques to move laterally through networks before deploying their ransomware payload that uses ChaCha20 encryption. The group employs double extortion tactics, stealing sensitive data before encryption and threatening to publish it on their leak site if ransom demands are not met. Notable campaigns include attacks on major manufacturing companies, healthcare organizations, and critical infrastructure entities primarily across the United States, United Kingdom, Germany, Canada, and Italy, with the group showing particular focus on business services, manufacturing, technology, agriculture and food production, and transportation/logistics sectors. As of 2024, Black Basta remains active and continues to evolve its tactics, techniques, and procedures while maintaining a steady pace of victim recruitment and ransom collection operations. The group has been linked to 523 public disclosures across our corpus. First observed on a leak site on April 26, 2022; most recent post January 11, 2025. The operation is currently inactive.

Timeline of this disclosure

January 11, 2025arunestates.co.uk listed by blackbastaon the group's public leak site

Data size: 1.5 TB

Other recent disclosures by blackbasta

blackbasta has been linked to 523 public victims on Darkfield. A sample of the most recent:

See the full blackbasta dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,643 disclosures indexed across all operators we track. Geographically, arunestates.co.uk is reported in United Kingdom, a country with 902 ransomware disclosures in our corpus.

If your organisation is affected

A listing by blackbasta means arunestates.co.uk 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.
Monitor for the data appearing on blackbasta'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.