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Ransomware Victim Construction

Thompson Builders Corporation

Ransomware attack by Securotrop · Disclosed May 4, 2026 · 🇺🇸 United States

www.tbcorp.com

Date Disclosed
May 4, 2026
2026
Threat Group
Securotrop
42 total victims
Country
🇺🇸 United States
Industry
Construction

ThreatAI Analysis

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

About the Securotrop group

Securotrop is a ransomware group established in early 2025 that operates within the Qilin affiliate network while maintaining an independent public identity, focusing exclusively on commercial targets and deliberately avoiding healthcare and government entities, with approximately 32 documented victims. Securotrop has listed 40 victims since June 2025.

Incident Analysis

Thompson Builders Corporation was targeted by Securotrop ransomware, one of the most active ransomware groups in our database with 42 confirmed victims globally. The attack was disclosed on May 4, 2026, when Thompson Builders Corporation appeared on the group's dark web leak site.

Thompson Builders Corporation is based in United States , operating in the Construction sector. United States ranks #1 globally for ransomware attacks, with 9,420 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.

Securotrop 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 — 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: Sep 6, 2026 02:00 UTC.

Frequently Asked Questions

Was Thompson Builders Corporation attacked by ransomware?

Yes. Thompson Builders Corporation was listed as a victim of the Securotrop ransomware group on May 4, 2026. The organisation is based in United States and operates in the Construction sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Thompson Builders Corporation?

Thompson Builders Corporation was attacked by Securotrop ransomware. Securotrop is one of the most active ransomware groups, having claimed 42 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Thompson Builders Corporation ransomware attack occur?

The ransomware attack on Thompson Builders Corporation was disclosed on May 4, 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 Thompson Builders Corporation ransomware attack?

The specific data stolen from Thompson Builders Corporation 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, Thompson Builders Corporation likely held sensitive business data, client information, and operational records.

How can organisations protect against Securotrop attacks?

To defend against Securotrop 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.