Cyber Threat Intelligence
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Ransomware Victim Hospitality and Tourism

Marriott International Inc

Ransomware attack by Silentransomgroup · Disclosed May 6, 2025 · 🇺🇸 United States

marriott.com

Date Disclosed
May 6, 2025
2025
Threat Group
Silentransomgroup
145 total victims
Country
🇺🇸 United States
Industry
Hospitality and Tourism

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Silentransomgroup. Figures and technique mappings are quoted from the source data, not inferred.

About the Silentransomgroup group

a former Conti team Silentransomgroup has listed 119 victims since June 2022.

Incident Analysis

Marriott International Inc was targeted by Silentransomgroup ransomware, one of the most active ransomware groups in our database with 145 confirmed victims globally. The attack was disclosed on May 6, 2025, when Marriott International Inc appeared on the group's dark web leak site.

Marriott International Inc is based in United States , operating in the Hospitality and Tourism sector. United States ranks #1 globally for ransomware attacks, with 9,428 victims in our database.

Sector context: Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Silentransomgroup 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 7, 2026 04:00 UTC.

Frequently Asked Questions

Was Marriott International Inc attacked by ransomware?

Yes. Marriott International Inc was listed as a victim of the Silentransomgroup ransomware group on May 6, 2025. The organisation is based in United States and operates in the Hospitality and Tourism sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Marriott International Inc?

Marriott International Inc was attacked by Silentransomgroup ransomware. Silentransomgroup is one of the most active ransomware groups, having claimed 145 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Marriott International Inc ransomware attack occur?

The ransomware attack on Marriott International Inc was disclosed on May 6, 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 Marriott International Inc ransomware attack?

The specific data stolen from Marriott International Inc 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 Hospitality and Tourism organisation, Marriott International Inc likely held sensitive business data, client information, and operational records.

How can organisations protect against Silentransomgroup attacks?

To defend against Silentransomgroup 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.