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Marriott International Inc

Claimed by SilentRansomGroup · listed 1 year ago

14m
Age
since listed · data leaked

Status timeline

  1. ListedMay 6, 2025
  2. Data leakeddate unknown

At a glance

Group
SilentRansomGroup
Status
Data leaked
Country
United States
Sector
Hospitality and Tourism
Listed on leak site
May 6, 2025

About the victim

AI dossier — public-source company profile

Marriott International Inc is the world's largest hotel company by number of properties, operating, franchising, and licensing a diverse portfolio of hotel and timeshare brands across over 130 countries. The company manages over 7,600 properties globally with approximately 174,000 employees.

Industry
Hospitality & Hotel Management
Address
10 Parkway, Bethesda, Maryland 20817, United States
Employees
174000
Founded
1927

Attack summary

Severity: critical — Marriott handles guest PII at massive scale (hundreds of millions of customers globally) and employee data across 174,000 staff. Confirmed data publication by threat actor indicates successful exfiltration of sensitive hospitality data with direct exposure to individuals' personal information, financial records, and potential identity theft vectors.

SilentRansomGroup claims to have conducted an attack on Marriott International resulting in data exfiltration. The group has published data, indicating confirmed breach with information disclosure.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Guest personal information
  • Employee records
  • Financial data
  • Operational systems data
  • Reservation systems

What the group claims

Marriott International, Inc. operates, franchises, and licenses hotels and timeshare properties worldw…

Source

Indexed 1 year 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 SilentRansomGroup

Based on the limited available information, SilentRansomGroup is a relatively new ransomware operation that first emerged in May 2025, appearing to be financially motivated given their targeting patterns across multiple high-value sectors. The group's origin and affiliations remain unclear due to their recent emergence, though their diverse geographic targeting including the United States, Germany, Canada, and Russia suggests either a sophisticated operation or potential ransomware-as-a-service model. Their attack methodology and specific technical capabilities have not been extensively documented by major security researchers, though their targeting of business services, financial services, hospitality, and manufacturing sectors indicates they likely focus on organizations with both valuable data and ability to pay significant ransoms. With 93 known victims across multiple countries and sectors in a relatively short timeframe since May 2025, SilentRansomGroup has demonstrated notable activity levels, though specific high-profile campaigns or ransom amounts have not been publicly disclosed by CISA, FBI, or major threat intelligence firms. The group appears to remain active as of current reporting periods, though comprehensive technical analysis and attribution efforts by established security researchers are still developing given their recent emergence in the threat landscape. The group has been linked to 120 public disclosures across our corpus. First observed on a leak site on May 6, 2025; most recent post June 17, 2026. The operation is currently active.

Timeline of this disclosure

  • May 6, 2025Marriott International Inc listed by SilentRansomGroupon the group's public leak site

Other recent disclosures by SilentRansomGroup

SilentRansomGroup has been linked to 120 public victims on Darkfield. A sample of the most recent:

See the full SilentRansomGroup 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 International Inc is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by SilentRansomGroup means Marriott International Inc 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 SilentRansomGroup'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.