Was Windsor Management Corporation hit by ransomware?

Windsor Management Corporation was listed by the beast ransomware operation (United States) as a victim being extorted; data had not been published at the time of listing. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the beast ransomware group?

beast is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

Ransomware victim disclosure

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Windsor Management Corporation

Claimed by Beast · listed 3 months ago

Age

since listed · listed for ransom

Status timeline

ListedMay 30, 2026

Current state: Listed for ransom

At a glance

Group: Beast
Status: Listed for ransom
Country: United States
Sector: Real Estate
Listed on leak site: May 30, 2026

About the victim

AI dossier — public-source company profile

Windsor Management Corporation is a privately held, full-service commercial real estate company serving New York and Connecticut since 1944. The company focuses on property management, tenant services, and property upgrades with an emphasis on personal attention and long-term tenant relationships.

Industry: Commercial Real Estate Management
Founded: 1944

Attack summary

Severity: low — Victim is listed on the leak site with no published proof files, no confirmed data exfiltration details, no operational impact stated, and no ransom demand substantiation. The listing appears to be an announcement only.

The ransomware group claims to have compromised Windsor Management Corporation and lists the victim on their leak site. No specific details on encryption, exfiltration, or data types are provided in the post.

low

What the group claims

A privately held, full-service commercial real estate company serving New York and Connecticut since 1944. Focuses on commercial property management with a hands-on approach, creating value for tenants, employees, and communities through property upgrades and tenant services.

The leak post

captured from the group's site

Real Estate Windsor Management Corporation is a privately held, full-service commercial real estate company serving New York and Connecticut since 1944. Our operational and ownership philosophy is centered on creating value for our tenants, our employees, and the communities within which we conduct our business through reinvesting in property upgrades and providing top level tenant services. We employ a comprehensive hands-on approach to property management maximizing results and fine tuning efficiency. Our viewpoint is one of personal attention, open communication and strategic insight. Windsor Management focuses on cultivating associations and through our extensive network of professional contacts we have formed long term and mutually beneficial relationships with tenants and colleagues while maintaining dynamic and fluid environments.

Screenshot of the leak post

Leak screenshot for Windsor Management Corporation

Sources

Leak posthttp://beast6azu4f7fxjakiayhnssybibsgjnmy77a6duufqw5afjzfjhzuqd.onion/card/windsor_realty_and_management

Source

Indexed 3 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About beast

The Beast ransomware group is a relatively new threat actor that emerged in July 2025, operating with apparent financial motivations through their ransomware campaigns. With limited public documentation available from major security agencies, the group has demonstrated activity primarily targeting victims across the United States, United Kingdom, Brazil, South Korea, and Argentina, accumulating approximately 65 known victims since their emergence. Their targeting pattern shows a focus on healthcare organizations, manufacturing companies, educational institutions, and construction firms, suggesting an opportunistic approach rather than highly specialized sector expertise. The group's recent emergence means there is insufficient public intelligence from CISA, FBI, Mandiant, or other established security researchers regarding their specific attack methodologies, initial access vectors, or technical capabilities. Given the timeline of their first observation in mid-2025, Beast represents an active and emerging threat with their current operational status remaining unclear due to limited threat intelligence reporting from authoritative sources. The group has been linked to 106 public disclosures across our corpus. First observed on a leak site on July 29, 2025; most recent post August 25, 2026. The operation is currently active.

Timeline of this disclosure

May 30, 2026Windsor Management Corporation listed by beaston the group's public leak site

Other recent disclosures by beast

beast has been linked to 106 public victims on Darkfield. A sample of the most recent:

See the full beast dossier →

Sector and geography

This disclosure adds to ransomware activity in the Real Estate sector, which has 91 disclosures indexed across all operators we track. Geographically, Windsor Management Corporation is reported in United States, a country with 3,164 ransomware disclosures in our corpus.

If your organisation is affected

A listing by beast means Windsor Management Corporation appeared on a ransomware extortion site and is being pressured to pay before any publication. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on beast's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.