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JSM Group

Claimed by Losttrust · listed 3 years ago

34m
Age
since listed · data leaked

Status timeline

  1. ListedSep 26, 2023
  2. Data leakeddate unknown

At a glance

Group
Losttrust
Status
Data leaked
Country
United Kingdom
Sector
Energy & Utilities
Listed on leak site
Sep 26, 2023

About the victim

AI dossier — public-source company profile

JSM Group Services Ltd. is a UK-based provider of integrated utility infrastructure solutions specialising in energy and telecommunications. The company delivers end-to-end technical services including high-voltage electrical installations, fibre optic networks, substations, renewable energy connections, and data centre connectivity. It operates across multiple UK regions and has completed projects for network operators, solar farms, battery energy storage systems, and international data centre campuses.

Industry
Utility Infrastructure & Energy Services

Attack summary

Severity: high — Data has been published by the threat actor against a utility infrastructure provider operating in critical energy and communications sectors; confirmed exfiltration and publication represents significant business and potentially sensitive operational data exposure, with implications for critical infrastructure clients.

The Losttrust ransomware group claims to have attacked JSM Group and has published data (disclosed status: data_published), asserting the company is a utilities service provider specialising in integrated power and communications solutions. No specific ransom amount or data volume has been stated, but the disclosure indicates exfiltration and/or publication of company data.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Company operational data
  • Project and portfolio information
  • Potentially employee records
  • Potentially client/contract data
  • Potentially financial records

What the group claims

JSM is a utilities service provider specialising in the delivery of integrated power and communications solutions.

Sources

Source

Indexed 3 years 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 Losttrust

Losttrust is a relatively new ransomware group that emerged in September 2023, operating with apparent financial motivations and demonstrating a broad international targeting scope across multiple sectors. The group's origin and affiliations remain largely undocumented by major threat intelligence organizations, with limited public reporting from established security firms regarding their operational structure or potential ransomware-as-a-service connections. Based on available victim data, Losttrust appears to employ opportunistic targeting methods, having compromised 53 known victims across diverse geographic regions including the United States, Italy, Germany, Argentina, and India, with particular focus on education, legal services, media organizations, food and agriculture companies, and government entities. The specific attack methodologies, initial access vectors, encryption techniques, and extortion tactics employed by Losttrust have not been extensively documented in public threat intelligence reports from major security vendors or law enforcement agencies. Given the group's recent emergence and limited visibility in established threat intelligence channels, their current operational status and activity levels remain unclear, though the breadth of their reported victim base suggests ongoing operations as of recent observations. The group has been linked to 53 public disclosures across our corpus. First observed on a leak site on September 26, 2023. The operation is currently inactive.

Also tracked as: LOST TRUST.

Timeline of this disclosure

  • September 26, 2023JSM Group listed by Losttruston the group's public leak site

Other recent disclosures by Losttrust

Losttrust has been linked to 53 public victims on Darkfield. A sample of the most recent:

See the full Losttrust dossier →

Sector and geography

This disclosure adds to ransomware activity in the Energy & Utilities sector, which has 166 disclosures indexed across all operators we track. Geographically, JSM Group is reported in United Kingdom, a country with 1,217 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Losttrust means JSM 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 Losttrust'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.