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Cyber Threat
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Ransomware victim Business Services

Horst Realty

Listed by Brotherhood on · organisation based in United States

www.horstrealty.com

Disclosed
Nov 15, 2025
Leak-site listing date
Threat group
Brotherhood
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 Brotherhood. Figures and technique mappings are quoted from the source data, not inferred.

About the Brotherhood group

Brotherhood is a ransomware group that emerged in late 2025, targeting organizations in the US, Canada, and Australia across manufacturing, communications, and construction sectors, operating a Tor-based double-extortion leak site. Brotherhood has listed 18 victims since April 2025.

Incident analysis

Horst Realty was listed by Brotherhood ransomware, a group with 18 victims recorded in this database. The listing appeared on the group's leak site on November 15, 2025.

Horst Realty is based in United States and operates in the Business Services sector. United States ranks #1 worldwide for ransomware disclosures, with 10,200 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.

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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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

Yes. Horst Realty was listed as a victim of the Brotherhood ransomware group on November 15, 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 Horst Realty?

Horst Realty was attacked by Brotherhood ransomware. Brotherhood 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 Horst Realty ransomware attack occur?

The ransomware attack on Horst Realty was disclosed on November 15, 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 Horst Realty ransomware attack?

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

How can organisations protect against Brotherhood attacks?

To defend against Brotherhood 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.