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Sotheby’s International Realty

Claimed by Coinbasecartel · listed 7 months ago

7m
Age
since listed · data leaked

Status timeline

  1. ListedDec 9, 2025
  2. Data leakeddate unknown

At a glance

Group
Coinbasecartel
Status
Data leaked
Country
United States
Sector
Consumer Services
Listed on leak site
Dec 9, 2025

About the victim

AI dossier — public-source company profile

Dubai Sotheby's International Realty is a licensed affiliate of Sotheby's International Realty Affiliates LLC, operating independently in the UAE luxury property market. Headquartered in Dubai's EMAAR Business Park on Sheikh Zayed Road, the firm specialises in the sale, rental, and marketing of high-end residential properties across premier Dubai communities such as Palm Jumeirah, Emirates Hills, and Dubai Hills Estate. The site domain sothebysrealty.ae serves the UAE market.

Industry
Luxury Real Estate Brokerage
Address
EMAAR Business Park, Building 4, Office G-05, Sheikh Zayed Rd., Dubai, United Arab Emirates

Attack summary

Severity: medium — The group has published the company as an active target with confirmed exfiltration claimed, but no proof files, specific data volume, or sensitive regulated data categories (e.g., financial, medical) are described for this specific victim in the post. Disclosure status is 'data_published' but evidence specific to this victim is absent from the excerpt.

The coinbasecartel group claims to have exfiltrated data from the victim and has listed the company as an active target on its leak site, indicating data is held and negotiations are expected. No specific data categories or volume for this victim are detailed in the post, and no ransom amount is stated.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Client/customer records
  • Property listing data
  • Internal business documents

What the group claims

No description available.

The leak post

captured from the group's site
System Breach • Coinbasecartel We are looking for new partners/insiders. Send us a message to dicuss We are looking for new partners/insiders. Send us a message to dicuss CRITICAL ANNOUNCEMENTS × Contact Update We have changed our contact method. We now exclusively use qTox Messenger for all communications. SimpleX and Session have been discontinued. Our Tox ID: A7580331D4D16453CCE86D7ADFBCF0CEED0D0D1AEA8F4DBEEBCA9E3B46308F260DE9B41BD838 TO APTIM You may have noticed the sudden, heavy silence. The corporate VPNs are dead. We have been the silent architects of your network for the past three weeks. While your "elite" investigators from Mandiant sat in your logs, we sat directly beside them burning through over a hundred of your corporate identities like disposable tools. we have had your entire network and internal protocols. HOW LONG WILL YOU KEEP YOUR THOUSANDS OF FIELD WORKERS LOCKED OUT? We have successfully exfiltrated the most sensitive engineering data held by any firm in your sectors We hold the complete Navisworks 3D models, P&ID diagrams, and maintenance logic for your major energy plants. This includes the granular Honeywell DCS controller logic. We know…

Sources

Source

Indexed 7 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 coinbasecartel

CoinbaseCartel is a ransomware group that emerged in September 2025 with financially motivated operations targeting organizations across multiple sectors and geographic regions. The group has demonstrated significant activity in a short timeframe, compromising at least 102 known victims primarily across the United States, United Arab Emirates, Germany, Canada, and Brazil. Their targeting patterns show a preference for technology companies, financial services organizations, manufacturing entities, and consumer services businesses, suggesting an opportunistic approach focused on organizations likely to have both valuable data and the financial resources to pay ransoms. Given the group's recent emergence and limited public documentation from established threat intelligence sources, details regarding their specific attack methodologies, infrastructure, and organizational structure remain largely unconfirmed by major cybersecurity firms or law enforcement agencies. The group appears to maintain active operations as of late 2025, though comprehensive analysis of their tactics, techniques, and procedures awaits further investigation and reporting by established threat intelligence organizations. The group has been linked to 188 public disclosures across our corpus. First observed on a leak site on September 15, 2025; most recent post July 14, 2026. The operation is currently active.

Also tracked as: coinbase cartel.

Timeline of this disclosure

  • December 9, 2025Sotheby’s International Realty listed by coinbasecartelon the group's public leak site

Other recent disclosures by coinbasecartel

coinbasecartel has been linked to 188 public victims on Darkfield. A sample of the most recent:

See the full coinbasecartel dossier →

Sector and geography

This disclosure adds to ransomware activity in the Consumer Services sector, which has 829 disclosures indexed across all operators we track. Geographically, Sotheby’s International Realty is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by coinbasecartel means Sotheby’s International Realty appeared on a ransomware extortion site and data attributed to it has been published. 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 coinbasecartel'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.