Was Kabelovna Kabex hit by ransomware?

Kabelovna Kabex was listed by the thegentlemen ransomware operation (Czechia), 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 thegentlemen ransomware group?

thegentlemen 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 Kabelovna Kabex breach?

thegentlemen published data attributed to Kabelovna Kabex. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Kabelovna Kabex

Claimed by Thegentlemen · listed 3 months ago

Age

since listed · data leaked

Status timeline

ListedMar 16, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Czechia
Sector: Telecommunication
Listed on leak site: Mar 16, 2026

About the victim

AI dossier — public-source company profile

Kabelovna Kabex a.s. is a Czech manufacturer specializing in fire-resistant, CPR, and LOCA cables, as well as custom-engineered cable solutions for demanding environments. The company supplies major customers in the energy sector (including nuclear power), petrochemicals, and transport infrastructure (notably tunnel construction). Based in Holýšov, Czech Republic, the company has over 25 years of operating history with more than 90% Czech employees.

Industry: Specialty Cable Manufacturing
Address: Holýšov, Czech Republic

Attack summary

Severity: high — Data is marked as published (confirmed exfiltration) from a specialty cable manufacturer serving critical infrastructure sectors including nuclear energy and petrochemicals, making the potential exposure of business-sensitive and operational data significant.

The group 'thegentlemen' claims to have published data exfiltrated from Kabelovna Kabex a.s.; the leak post itself was inaccessible due to a bot-verification gate, but the disclosure status is recorded as 'data_published', indicating data has been released.

high

What the group claims

kabex.cz rocketreach.co/kabelovna-kabex-as-profile_b5947399f662772e Kabelovna Kabex is a Czech special cable manufacturer founded in 1994 . The company specializes in cables for nuclear power plants (including LOCA-cables), hermetic cable penetrations, and power cables up to 30 kV . Kabex is a key supplier to Czech and Slovak nuclear plants and has supplied projects like the Kudankulam NPP in India

The leak post

captured from the group's site

Gentlecloud Protection 🛡️ Gentlecloud Verifying your browser... Initializing security checks... I'm not a bot

Sources

Victim sitekabex.cz
Leak posthttp://tezwsse5czllksjb7cwp65rvnk4oobmzti2znn42i43bjdfd2prqqkad.onion

Source

Indexed 3 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 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 483 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post June 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

March 16, 2026Kabelovna Kabex listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 483 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 Telecommunication sector, which has 54 disclosures indexed across all operators we track. Geographically, Kabelovna Kabex is reported in Czechia, a country with 5 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Kabelovna Kabex 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.