Cyber Threat Intelligence
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Ransomware Victim Financial Services

American Contractors Insurance Group

Ransomware attack by Storm · Disclosed August 19, 2026 · 🇺🇸 United States

Date Disclosed
Aug 19, 2026
2026
Threat Group
Storm
49 total victims
Country
🇺🇸 United States
Industry
Financial Services

ThreatAI Analysis

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

American Contractors Insurance Group was listed on the Storm dark web leak site on 19 August 2026; a construction industry owned insurance facility that provides workers compensation, general liability, automobile liability, and subcontractor default insurance.

About American Contractors Insurance Group

ACIG is a construction industry owned insurance facility based in Dallas, TX. ACIG provides workers compensation, general liability, automobile liability and subcontractor default insurance through ACIG Insurance Company and American Contractors Insurance Company Risk Retention Group. ACIG's mission is to save lives, prevent injuries and reduce the overall cost of risk and insurance for its members. The company headquarters is located in 2600 N. Central Expressway, Suite 800, Richardson, TX 75080, United States. 51-200 Employees

Source record: ransomware.live

About the Storm group

Storm has listed 9 victims since August 2026.

Incident Analysis

American Contractors Insurance Group was targeted by Storm ransomware, one of the most active ransomware groups in our database with 49 confirmed victims globally. The attack was disclosed on August 19, 2026, when American Contractors Insurance Group appeared on the group's dark web leak site.

American Contractors Insurance Group is based in United States , operating in the Financial Services sector. United States ranks #1 globally for ransomware attacks, with 9,442 victims in our database.

Sector context: Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Storm 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 8, 2026 08:00 UTC.

Frequently Asked Questions

Was American Contractors Insurance Group attacked by ransomware?

Yes. American Contractors Insurance Group was listed as a victim of the Storm ransomware group on August 19, 2026. The organisation is based in United States and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked American Contractors Insurance Group?

American Contractors Insurance Group was attacked by Storm ransomware. Storm is one of the most active ransomware groups, having claimed 49 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the American Contractors Insurance Group ransomware attack occur?

The ransomware attack on American Contractors Insurance Group was disclosed on August 19, 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 American Contractors Insurance Group ransomware attack?

The specific data stolen from American Contractors Insurance Group 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 Financial Services organisation, American Contractors Insurance Group likely held financial records, client data, and transaction histories.

How can organisations protect against Storm attacks?

To defend against Storm 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.