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Ark Consultancy

Claimed by Blackbyte · listed 1 year ago

12m
Age
since listed · data leaked

Status timeline

  1. ListedJul 16, 2025
  2. Data leakeddate unknown

At a glance

Group
Blackbyte
Status
Data leaked
Country
United Kingdom
Listed on leak site
Jul 16, 2025

About the victim

AI dossier — public-source company profile

ARK Consultancy Limited is a UK-based management and technical consultancy specializing in social housing sector support. Operating for over 35 years, they provide services to local authorities and housing associations including asset management, decarbonization, resident engagement, governance, and interim staffing.

Industry
Management & Technical Consultancy – Social Housing
Founded
1989

Attack summary

Severity: medium — Data published flag indicates exfiltration occurred, but no proof files are advertised, data inventory is not specified, and the victim sector (social housing consultancy) handles sensitive client and resident information. Without visible proof or concrete data inventory detail, severity cannot be elevated to high.

Blackbyte ransomware operator claims data exfiltration from ARK Consultancy. The leak post describes the company but provides no specific details on attack method, data categories compromised, or proof artifacts.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Client asset management records
  • Resident data
  • Strategic governance documents
  • Business operations records
  • Client communications

What the group claims

ARK Consultancy Limited is a leading management and technical consultancy specializing in social housing, dedicated to supporting local authorities and housing associations throughout the UK. They offer a wide range of services that include asset management, decarbonization, resident engagement, and strategic governance.

Sources

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 Blackbyte

BlackByte is a ransomware-as-a-service (RaaS) operation that emerged in October 2021, primarily motivated by financial gain through double extortion tactics targeting organizations across multiple sectors. The group is suspected to operate from Russia or former Soviet states based on their use of Russian-language forums and avoidance of targeting organizations in Commonwealth of Independent States countries, though they maintain no confirmed links to other established ransomware families. BlackByte operators typically gain initial access through vulnerable Microsoft Exchange servers, phishing campaigns, and exploitation of remote desktop protocol (RDP) services, employing tools such as Cobalt Strike for lateral movement and data exfiltration before deploying their custom ransomware payload that uses AES-256 encryption with RSA-2048 key protection. The group has demonstrated particular focus on critical infrastructure sectors, with the FBI and CISA issuing joint advisories in February 2022 highlighting attacks against organizations in government, healthcare, manufacturing, and education sectors, including notable incidents affecting San Francisco's transportation authority and multiple healthcare systems across the United States. BlackByte remains active as of 2024, continuing to evolve their tactics and maintain their leak site for publishing stolen data from victims who refuse to pay ransoms. The group has been linked to 147 public disclosures across our corpus. First observed on a leak site on October 4, 2021; most recent post July 30, 2025. The operation is currently inactive.

Timeline of this disclosure

  • July 16, 2025Ark Consultancy listed by Blackbyteon the group's public leak site

Other recent disclosures by Blackbyte

Blackbyte has been linked to 147 public victims on Darkfield. A sample of the most recent:

See the full Blackbyte dossier →

Sector and geography

Geographically, Ark Consultancy is reported in United Kingdom, a country with 1,217 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Blackbyte means Ark Consultancy 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 Blackbyte'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.