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Cyber Threat
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Ransomware victim Manufacturing

Andersen Construction

Listed by Vortex on · organisation based in United States

andersen-const.com

Disclosed
Nov 10, 2026
Leak-site listing date
Threat group
Vortex
14 victims listed
Country
United States
#1 most targeted
Sector
Manufacturing

ThreatAI analysis

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

About the Vortex group

Vortex has listed 14 victims since September 2026.

Incident analysis

Andersen Construction was listed by Vortex ransomware, a group with 14 victims recorded in this database. The listing appeared on the group's leak site on November 10, 2026.

Andersen Construction is based in United States and operates in the Manufacturing sector. United States ranks #1 worldwide for ransomware disclosures, with 10,481 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.

Vortex 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 Andersen Construction attacked by ransomware?

Yes. Andersen Construction was listed as a victim of the Vortex ransomware group on November 10, 2026. The organisation is based in United States and operates in the Manufacturing sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Andersen Construction?

Andersen Construction was attacked by Vortex ransomware. Vortex is one of the most active ransomware groups, having claimed 14 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Andersen Construction ransomware attack occur?

The ransomware attack on Andersen Construction was disclosed on November 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 Andersen Construction ransomware attack?

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

How can organisations protect against Vortex attacks?

To defend against Vortex 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.