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Marriott International

listed as marriott.com · Claimed by LockBit · listed 7 months ago

7m
Age
since listed · data leaked

Status timeline

  1. ListedDec 7, 2025
  2. Data leakeddate unknown

At a glance

Group
LockBit
Status
Data leaked
Country
United States
Sector
Hospitality and Tourism
Listed on leak site
Dec 7, 2025

About the victim

AI dossier — public-source company profile

Marriott International is one of the world's largest hospitality companies, operating and franchising over 9,000 hotels and resorts across more than 140 countries under 30+ brands including Marriott, Sheraton, Westin, and Ritz-Carlton. The company is headquartered in Bethesda, Maryland, and operates the Marriott Bonvoy loyalty program with hundreds of millions of members. It serves both leisure and business travelers across luxury, premium, and select service segments.

Industry
Hospitality & Hotel Management
Address
7750 Wisconsin Avenue, Bethesda, Maryland 20814, United States
Employees
120000
Founded
1927

Attack summary

Severity: critical — Marriott International holds massive volumes of regulated PII including passport numbers, payment card data, and loyalty program records for hundreds of millions of global guests. A confirmed data_published status by a major ransomware group against one of the world's largest hotel chains constitutes a critical-severity incident given the scale of potential exposure of sensitive personal and financial data.

LockBit claims to have attacked Marriott International, with the disclosure status marked as data_published, indicating exfiltration and/or publication of data. The leak post content is minimal and no specific data categories or ransom amount were stated in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Guest personal information
  • Loyalty program (Marriott Bonvoy) member data
  • Reservation records
  • Payment card data
  • Employee records

What the group claims

Book Directly & Save at any of our 9000+ Marriott Bonvoy Hotels. Choose from Luxury Hotels, Reso...

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 LockBit

LockBit is a highly prolific ransomware group that emerged in October 2020 and has become one of the most active ransomware operations globally, with over 3,500 documented victims and a primary motivation of financial gain through extortion. The group is suspected to originate from Russia and operates as a Ransomware-as-a-Service (RaaS) model, recruiting affiliates to conduct attacks while providing them with ransomware tools, infrastructure, and support. LockBit primarily gains initial access through exploiting vulnerabilities in public-facing applications, credential stuffing attacks, and phishing campaigns, employing double extortion tactics where they steal sensitive data before encrypting systems and threatening to leak the information if ransom demands are not met. The group has demonstrated significant technical sophistication, developing multiple variants including LockBit 3.0 (also known as LockBit Black), and has been particularly active in targeting business services, manufacturing, technology, and healthcare sectors across the United States, France, Germany, United Kingdom, and Italy. Despite ongoing law enforcement efforts and international cooperation to disrupt their operations, including seizures of infrastructure and arrests of affiliates, LockBit has shown resilience and adaptability, continuing to operate and evolve their tactics while maintaining their position as one of the most dominant ransomware threats in the cybercriminal landscape. The group has been linked to 3,536 public disclosures across our corpus. First observed on a leak site on October 21, 2020; most recent post March 30, 2026. The operation is currently active.

Also tracked as: LockBit 3.0, LockBit Black, LockBit Green, ABCD ransomware.

Timeline of this disclosure

  • December 7, 2025marriott.com listed by LockBiton the group's public leak site

Other recent disclosures by LockBit

LockBit has been linked to 3,536 public victims on Darkfield. A sample of the most recent:

See the full LockBit dossier →

Sector and geography

This disclosure adds to ransomware activity in the Hospitality and Tourism sector, which has 452 disclosures indexed across all operators we track. Geographically, marriott.com is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by LockBit means marriott.com 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 LockBit'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.