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AMS Group

Claimed by Stormous · listed 2 months ago

33GB
Data size
2m
Age
since listed · data leaked

Status timeline

  1. ListedMay 12, 2026
  2. Data leakeddate unknown

At a glance

Group
Stormous
Status
Data leaked
Country
United Kingdom
Sector
Business Services
Listed on leak site
May 12, 2026
Data size
33GB

About the victim

AI dossier — public-source company profile

AMS (Avon Material Supplies Ltd) is a leading materials supply and recycling company based in Dorset, UK, operating since 1993. The company provides aggregates, ready-mixed concrete, skip hire, grab lorry hire, waste collection, and waste disposal services to individuals and businesses across Dorset, Somerset, and surrounding areas. It operates multiple licensed disposal and recycling sites including facilities at Wimborne, Weymouth, and other locations in the region.

Industry
Waste Management & Construction Materials Supply
Address
Canford Recycling Centre, Wimborne, Dorset, United Kingdom
Founded
1993

Attack summary

Severity: high — 33GB of data has been fully published (disclosed status: data_published), including payroll sheets, employee records, client/partner directories, financial records, and legal/tax documents. This constitutes confirmed exfiltration of significant business data including employee PII (payroll) and sensitive commercial information, warranting a high severity rating.

Stormous claims to have exfiltrated 33GB of data from AMS Group and has published it in full. The disclosed data includes administrative and financial records, payroll sheets, client and partner directories, employee records, technical and engineering specifications, architectural designs, contracts, engineering reports, construction site maps, risk assessments, internal correspondence, and tax and legal information.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Administrative records
  • Financial records
  • Payroll sheets
  • Client and partner directories
  • Employee records
  • Technical and engineering specifications
  • Architectural designs
  • Official contracts
  • Detailed engineering reports
  • Construction site maps
  • Risk assessments
  • Internal correspondence
  • Tax information
  • Legal information
  • Business plans

What the group claims

The extracted data comprises administrative and financial records, payroll sheets, and client and partner directories, alongside technical and engineering specifications, employee records, and business plans. It also includes architectural designs, official contracts, detailed engineering reports, and construction site maps, as well as risk assessments, internal correspondence, and tax and legal information.

The leak post

captured from the group's site
ams-group.co.uk FULL DATA DUMP 33GB
ams-group.co.uk FULL DATA DUMP 33GB
The extracted data comprises administrative and financial records, payroll sheets, and client and partner directories, alongside technical and engineering specifications, employee records, and business plans. It also includes architectural designs, official contracts, detailed engineering reports, and construction site maps, as well as risk assessments, internal correspondence, and tax and legal information.
We releasing the databases of CGCSA.CO.ZA (Consumer Goods Council of South Africa) for free. This comes after the company failed to reach a resolution and publicly denied the breach.The total size is 20 GB and includes.Full Reports CustomerData (thousands of clients) Scripts & Statements Invoices & CEO Reports TCS CGCSA & CGCSA ACC BACKUP SAGE200EVOSQL CGCSA FULL The data has been uploaded to Mega https://mega.nz/folder/siwUDQbL#-c-tWl8fW8zy1tcmEzoUhw
$900k to Solve the Problem 5TB — While TTT Company was preoccupied with designing luxurious interiors and architectural masterpieces, they completely overlooked the design of a secure network. We have spent enough time within their internal infrastructure to c…

Data the group says was taken

  • administrative records
  • financial records
  • payroll sheets
  • client directories
  • partner directories
  • technical specifications
  • engineering specifications
  • employee records
  • business plans
  • architectural designs
  • contracts
  • engineering reports
  • construction site maps
  • risk assessments
  • internal correspondence
  • tax information
  • legal information

Sources

Source

Indexed 2 months 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 Stormous

Stormous is a relatively new ransomware group that emerged in March 2022, operating primarily with financial motivations and has claimed responsibility for attacks against at least 165 victims across multiple countries and sectors. The group's country of origin remains unclear from publicly documented sources, though their operational patterns suggest they may operate as an independent entity rather than a established ransomware-as-a-service model. Limited public documentation from major security firms indicates the group employs common ransomware tactics, though specific details about their initial access vectors, encryption methods, and data exfiltration practices have not been extensively detailed in reports from CISA, FBI, or major threat intelligence providers. Their targeting appears geographically diverse with a focus on Spain, the United States, France, UAE, and Brazil, while showing particular interest in technology, hospitality and tourism, government, and business services sectors, though many of their victims span unspecified industries. As of current reporting, Stormous appears to remain an active threat, though the limited public documentation suggests they operate as a lower-tier ransomware group compared to more prominent families that receive extensive coverage from major security research organizations. The group has been linked to 245 public disclosures across our corpus. First observed on a leak site on March 22, 2022; most recent post July 1, 2026. The operation is currently active.

Timeline of this disclosure

  • May 12, 2026AMS Group listed by Stormouson the group's public leak site
Data size
33GB

Other recent disclosures by Stormous

Stormous has been linked to 245 public victims on Darkfield. A sample of the most recent:

See the full Stormous dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, AMS Group is reported in United Kingdom, a country with 1,217 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Stormous means AMS Group 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 Stormous'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.