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Cyber Threat
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Ransomware victim Business Services

THE MILLENNIUM GROUP

Listed by D4rk4rmy on · organisation based in United States

tmgofficeservices.com

Disclosed
Aug 16, 2025
Leak-site listing date
Threat group
D4rk4rmy
18 victims listed
Country
United States
#1 most targeted
Sector
Business Services

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for D4rk4rmy. Figures and technique mappings are quoted from the source data, not inferred.

About the D4rk4rmy group

D4rk4rmy is a ransomware and data extortion group active since at least 2025, targeting financial services, hospitality, technology, and logistics sectors, operating a RaaS model with notable claimed victims including the Monte Carlo casino resort. D4rk4rmy has listed 18 victims since July 2025.

Incident analysis

THE MILLENNIUM GROUP was listed by D4rk4rmy ransomware, a group with 18 victims recorded in this database. The listing appeared on the group's leak site on August 16, 2025.

THE MILLENNIUM GROUP is based in United States and operates in the Business Services sector. United States ranks #1 worldwide for ransomware disclosures, with 10,308 victims in this database.

Sector context. Business services firms often have access to multiple client environments, making them high-value pivot points for ransomware operators seeking to maximise impact across multiple victim organisations.

D4rk4rmy 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 THE MILLENNIUM GROUP attacked by ransomware?

Yes. THE MILLENNIUM GROUP was listed as a victim of the D4rk4rmy ransomware group on August 16, 2025. The organisation is based in United States and operates in the Business Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked THE MILLENNIUM GROUP?

THE MILLENNIUM GROUP was attacked by D4rk4rmy ransomware. D4rk4rmy is one of the most active ransomware groups, having claimed 18 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the THE MILLENNIUM GROUP ransomware attack occur?

The ransomware attack on THE MILLENNIUM GROUP was disclosed on August 16, 2025. 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 THE MILLENNIUM GROUP ransomware attack?

The specific data stolen from THE MILLENNIUM 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 Business Services organisation, THE MILLENNIUM GROUP likely held sensitive business data, client information, and operational records.

How can organisations protect against D4rk4rmy attacks?

To defend against D4rk4rmy 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.