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Ransomware Victim Construction

Merko Ehitus

Ransomware attack by Qilin Β· Disclosed December 15, 2025 Β· πŸ‡ͺπŸ‡ͺ Estonia

www.merko.ee

Date Disclosed
Dec 15, 2025
2025
Threat Group
Qilin
2,070 total victims
Country
πŸ‡ͺπŸ‡ͺ Estonia
Industry
Construction

Incident Analysis

Merko Ehitus was targeted by Qilin ransomware, one of the most active ransomware groups in our database with 2,070 confirmed victims globally. The attack was disclosed on December 15, 2025, when Merko Ehitus appeared on the group's dark web leak site.

Merko Ehitus is based in Estonia , operating in the Construction sector. Estonia ranks #116 globally for ransomware attacks, with 4 victims in our database.

Sector context: Construction firms often hold sensitive project data, client financials, and intellectual property. The industry's typically lean IT security teams can make them more vulnerable.

Qilin typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats β€” paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Aug 3, 2026 14:00 UTC.

Frequently Asked Questions

Was Merko Ehitus attacked by ransomware?

Yes. Merko Ehitus was listed as a victim of the Qilin ransomware group on December 15, 2025. The organisation is based in Estonia and operates in the Construction sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Merko Ehitus?

Merko Ehitus was attacked by Qilin ransomware. Qilin is one of the most active ransomware groups, having claimed 2,070 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Merko Ehitus ransomware attack occur?

The ransomware attack on Merko Ehitus was disclosed on December 15, 2025. 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 Merko Ehitus ransomware attack?

The specific data stolen from Merko Ehitus 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 Construction organisation, Merko Ehitus likely held sensitive business data, client information, and operational records.

How can organisations protect against Qilin attacks?

To defend against Qilin 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.