Was Muzeum Valassko hit by ransomware?

Muzeum Valassko was listed by the Deadlock 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 Deadlock ransomware group?

Deadlock 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 Muzeum Valassko breach?

Deadlock published data attributed to Muzeum Valassko. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Muzeum regionu Valašsko

listed as Muzeum Valassko · Claimed by Deadlock · listed 5 days ago

Age

since listed · data leaked

Status timeline

ListedJul 10, 2026
Data leakeddate unknown

At a glance

Group: Deadlock
Status: Data leaked
Country: Czechia
Sector: Hospitality and Tourism
Listed on leak site: Jul 10, 2026

About the victim

AI dossier — public-source company profile

Muzeum regionu Valašsko is a multi-site regional museum institution located in the Zlín Region of the Czech Republic. It operates several heritage sites including castles (Zámek Vsetín, Zámek Kinských, Zámek Lešná), an observatory (Hvězdárna Vsetín), and a church, offering exhibitions, educational programs, and cultural activities.

Industry: Museums & Cultural Heritage
Address: Zlín Region, Czech Republic

Attack summary

Severity: low — No proof files or screenshots advertised; no confirmed data exfiltration details; no operational disruption stated; listing appears to be announcement-only without substantiation.

Deadlock group claims to have accessed the museum's systems. The group post indicates data publication but provides no specific technical details about encryption, exfiltration scope, or data types targeted.

low

What the group claims

Muzeum regionu Valašsko (The Museum of the Wallachian Region) is a multi-site cultural institution in the Zlín Region of the Czech Republic.

Sources

Victim sitewww.muzeumvalassko.cz

Source

Indexed 5 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 Deadlock

Deadlock is a ransomware group first observed in June 2026 with an apparent financial motivation, having claimed responsibility for attacks against at least 10 known victims across a geographically diverse target set. Given the recency of their emergence and limited public documentation by major threat intelligence organizations such as CISA, FBI, or Mandiant at this time, a comprehensive technical profile cannot be fully established. Based on available victimology data, the group has demonstrated a targeting pattern spanning Singapore, China, Sweden, Spain, and Nigeria, suggesting an opportunistic or globally distributed operational scope rather than a regionally focused campaign. Targeted sectors include manufacturing, business services, telecommunications, and financial services, indicating a preference for industries with high operational dependencies and potential for significant disruption, which is consistent with financially motivated ransomware actors seeking maximum leverage for ransom payment. No confirmed attribution regarding country of origin, RaaS affiliation, or specific tooling has been publicly documented by authoritative sources as of this profile's preparation. Due to the group's nascent operational timeline and the limited volume of publicly verified intelligence, analysts should treat this profile as preliminary and subject to significant revision as additional technical indicators, victim disclosures, and research reporting become available. Continued monitoring is advised given the cross-sector and cross-regional targeting behavior observed in this early operational phase. The group has been linked to 76 public disclosures across our corpus. First observed on a leak site on June 15, 2026; most recent post July 12, 2026. The operation is currently active.

Timeline of this disclosure

July 10, 2026Muzeum Valassko listed by Deadlockon the group's public leak site

Other recent disclosures by Deadlock

Deadlock has been linked to 76 public victims on Darkfield. A sample of the most recent:

See the full Deadlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Hospitality and Tourism sector, which has 452 disclosures indexed across all operators we track. Geographically, Muzeum Valassko is reported in Czechia, a country with 15 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Deadlock means Muzeum Valassko 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 Deadlock'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.