Was Zamek Namest hit by ransomware?

Zamek Namest 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 Zamek Namest breach?

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

Ransomware victim disclosure

← All victims

Státní zámek Náměšť nad Oslavou

listed as Zamek Namest · Claimed by Thegentlemen · listed 2 months ago

Age

since listed · data leaked

Status timeline

ListedApr 4, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Czechia
Sector: Hospitality and Tourism
Listed on leak site: Apr 4, 2026

About the victim

AI dossier — public-source company profile

Státní zámek Náměšť nad Oslavou is a state-managed Renaissance chateau located in Náměšť nad Oslavou, Vysočina Region, Czech Republic, administered under the National Heritage Institute (NPÚ). The chateau serves as a public cultural and heritage site offering guided tours, art exhibitions, a chapel, library, tapestry collections, and a castle guesthouse. It is also a venue for musical events and festivals, and was historically the summer residence of President Edvard Beneš.

Industry: Heritage Tourism & Cultural Monument Management
Address: Náměšť nad Oslavou, Vysočina Region, Czech Republic

Attack summary

Severity: high — Data has been published by the threat actor. The leak post's deliberate emphasis on the target's proximity to a military airbase and nuclear power plant suggests the actor views — or frames — this as strategically sensitive, elevating concern beyond a typical hospitality breach. Published data from a state-managed institution with visitor PII and potential proximity to sensitive national infrastructure warrants a high severity rating.

The group 'thegentlemen' claims to have attacked zamek-namest.cz and has published data (disclosed status: data_published). The leak post describes the target's geographic and strategic context, notably its proximity to the Náměšť military airbase and Dukovany nuclear power plant, though no specific data categories or volumes are enumerated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Website/administrative data
Visitor/booking records (probable)
Online ticket and gift voucher system data (probable)
Internal operational documents (probable)

What the group claims

zamek-namest.cz is a historic Czech town famous for its Renaissance chateau and a unique 18th-century Baroque bridge decorated with 20 statues. It serves as a cultural hub in the Vysocina region, hosting the popular Folk Holidays music festival and various art exhibitions. The town is also strategically significant due to its proximity to the Namest military airbase and the Dukovany nuclear power plant

Sources

Victim sitezamek-namest.cz

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.

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 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

April 4, 2026Zamek Namest 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 Hospitality and Tourism sector, which has 159 disclosures indexed across all operators we track. Geographically, Zamek Namest is reported in Czechia, a country with 5 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Zamek Namest 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.