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Cyber Threat
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Ransomware victim Construction

McCarthy Inc

Listed by Kairos on · organisation based in United States

mccarthyinc.com

Disclosed
May 15, 2026
Leak-site listing date
Threat group
Kairos
107 victims listed
Country
United States
#1 most targeted
Sector
Construction

ThreatAI analysis

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

About the Kairos group

Kairos is a data extortion group active since late 2024 that focuses solely on data theft with no encryption, primarily targeting small-to-mid-sized organizations in healthcare, manufacturing, and business services in the US, purchasing initial access from brokers and demanding Bitcoin payments. Kairos has listed 100 victims since June 2024.

Incident analysis

McCarthy Inc was listed by Kairos ransomware, a group with 107 victims recorded in this database. The listing appeared on the group's leak site on May 15, 2026.

McCarthy Inc is based in United States and operates in the Construction sector. United States ranks #1 worldwide for ransomware disclosures, with 10,308 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.

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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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

Yes. McCarthy Inc was listed as a victim of the Kairos ransomware group on May 15, 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 McCarthy Inc?

McCarthy Inc was attacked by Kairos ransomware. Kairos is one of the most active ransomware groups, having claimed 107 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the McCarthy Inc ransomware attack occur?

The ransomware attack on McCarthy Inc was disclosed on May 15, 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 McCarthy Inc ransomware attack?

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

How can organisations protect against Kairos attacks?

To defend against Kairos 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.