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Cyber Threat
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Ransomware victim Construction

STC Concrete Product

Listed by Obscura on · organisation based in Thailand

stc.co.th

Disclosed
Jan 11, 2026
Leak-site listing date
Threat group
Obscura
33 victims listed
Country
Thailand
#17 most targeted
Sector
Construction

ThreatAI analysis

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

About the Obscura group

Obscura is a ransomware strain observed in 2025, written in Go and specifically targeting Windows domain controllers via the SYSVOL/NETLOGON share, using Curve25519 + XChaCha20 encryption with double-extortion tactics and a 10-day payment deadline. Obscura has listed 33 victims since July 2025.

Incident analysis

STC Concrete Product was listed by Obscura ransomware, a group with 33 victims recorded in this database. The listing appeared on the group's leak site on January 11, 2026.

STC Concrete Product is based in Thailand and operates in the Construction sector. Thailand ranks #17 worldwide for ransomware disclosures, with 190 victims in this 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.

Obscura 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 STC Concrete Product attacked by ransomware?

Yes. STC Concrete Product was listed as a victim of the Obscura ransomware group on January 11, 2026. The organisation is based in Thailand and operates in the Construction sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked STC Concrete Product?

STC Concrete Product was attacked by Obscura ransomware. Obscura is one of the most active ransomware groups, having claimed 33 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the STC Concrete Product ransomware attack occur?

The ransomware attack on STC Concrete Product was disclosed on January 11, 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 STC Concrete Product ransomware attack?

The specific data stolen from STC Concrete Product 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, STC Concrete Product likely held sensitive business data, client information, and operational records.

How can organisations protect against Obscura attacks?

To defend against Obscura 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.