Skip to main content
Darkfield

Ransomware victim disclosure

← All victims

Energon

Claimed by Thegentlemen · listed 4 days ago

4d
Age
since listed · data leaked

Status timeline

  1. ListedJul 11, 2026
  2. Data leakeddate unknown

At a glance

Group
Thegentlemen
Status
Data leaked
Country
Czechia
Sector
Energy
Listed on leak site
Jul 11, 2026

About the victim

AI dossier — public-source company profile

Energon Holding is a Czech energy group with 25+ years of industry experience, comprising 15 companies and 300+ specialists. The group operates across energy services, photovoltaics, and sustainable technologies, with active investment in renewable energy startups and power infrastructure security.

Industry
Energy Services & Renewable Energy
Employees
300+
Founded
1999

Attack summary

Severity: low — Post contains only a listing/announcement with no proof files, screenshots, or specific claims about data exfiltration or operational disruption. No ransom demand stated. Disclosure status indicates data_published but no actual data samples or inventory provided.

The ransomware group claims to have compromised Energon Holding. The post references ZoomInfo and the company's public profile but provides no specific details about data exfiltration, encryption, or the nature of compromised assets.

low

What the group claims

***.cz zoominfo.com/c/energon/430910504 ENERGON HOLDING is a prominent Czech group uniting various companies specialized in energy services, photovoltaics, and modern sustainable technologies. With over 25 years of industry experience, the group drives innovations that enhance the energy independence and competitiveness of the Czech Republic. They also actively invest in startups focused on renewable energy optimization, diagnostics, and the security of power infrastructure

Sources

Source

Indexed 4 days 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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 599 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

  • July 11, 2026Energon listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 599 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 652 disclosures indexed across all operators we track. Geographically, Energon is reported in Czechia, a country with 15 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Energon 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 thegentlemen'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.