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Cyber Threat
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Ransomware victim Manufacturing

FIRESTA

Listed by Deadlock on · organisation based in Czech Republic

www.firesta.cz

Disclosed
Jul 10, 2026
Leak-site listing date
Threat group
Deadlock
110 victims listed
Country
Czech Republic
#33 most targeted
Sector
Manufacturing

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Deadlock. Figures and technique mappings are quoted from the source data, not inferred.

About FIRESTA

Firesta-Fišer, a.s. is a Czech construction company based in Brno, established in 1990, specializing in transport infrastructure, including bridge, road, and railway construction. With over 600 employees, the company also operates in Slovakia, Poland, and Romania.

Source record: ransomware.live

About the Deadlock group

Deadlock has listed 104 victims since May 2026.

Incident analysis

FIRESTA was listed by Deadlock ransomware, a group with 110 victims recorded in this database. The listing appeared on the group's leak site on July 10, 2026.

FIRESTA is based in Czech Republic and operates in the Manufacturing sector. Czech Republic ranks #33 worldwide for ransomware disclosures, with 97 victims in this database.

Sector context. Manufacturing companies are frequently targeted because production downtime directly translates to financial loss. Ransomware operators exploit this time-sensitivity to demand higher ransoms and faster payment.

Deadlock typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was FIRESTA attacked by ransomware?

Yes. FIRESTA was listed as a victim of the Deadlock ransomware group on July 10, 2026. The organisation is based in Czech Republic and operates in the Manufacturing sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked FIRESTA?

FIRESTA was attacked by Deadlock ransomware. Deadlock is one of the most active ransomware groups, having claimed 110 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the FIRESTA ransomware attack occur?

The ransomware attack on FIRESTA was disclosed on July 10, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the FIRESTA ransomware attack?

The specific data stolen from FIRESTA has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Manufacturing organisation, FIRESTA likely held sensitive business data, client information, and operational records.

How can organisations protect against Deadlock attacks?

To defend against Deadlock and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.