Cyber Threat Intelligence
CTI Academy Sponsor CTI Academy
HO
Ransomware Victim Business Services

Horst Realty

Ransomware attack by Brotherhood · Disclosed November 15, 2025 · 🇺🇸 United States

www.horstrealty.com

Date Disclosed
Nov 15, 2025
2025
Threat Group
Brotherhood
18 total victims
Country
🇺🇸 United States
Industry
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 targeted by Brotherhood ransomware, one of the most active ransomware groups in our database with 18 confirmed victims globally. The attack was disclosed on November 15, 2025, when Horst Realty appeared on the group's dark web leak site.

Horst Realty is based in United States , operating in the Business Services sector. United States ranks #1 globally for ransomware attacks, with 9,442 victims in our 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 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 02:00 UTC.

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.