Cyber Threat Intelligence
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Ransomware Victim Financial Services

OCI International Holdings

Ransomware attack by Ransomhouse · Disclosed October 23, 2025 · 🇭🇰 Hong Kong

www.oci-intl.com

Date Disclosed
Oct 23, 2025
2025
Threat Group
Ransomhouse
148 total victims
Country
🇭🇰 Hong Kong
Industry
Financial Services

ThreatAI Analysis

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

About the Ransomhouse group

RansomHouse is a double-extortion RaaS operation active since late 2021, attributed to the threat actor "Jolly Scorpius," targeting over 120 organizations across healthcare, finance, transportation, and government, recently upgrading to a multi-layered dual-key encryption architecture. Ransomhouse has listed 206 victims since June 2021.

Incident Analysis

OCI International Holdings was targeted by Ransomhouse ransomware, one of the most active ransomware groups in our database with 148 confirmed victims globally. The attack was disclosed on October 23, 2025, when OCI International Holdings appeared on the group's dark web leak site.

OCI International Holdings is based in Hong Kong , operating in the Financial Services sector. Hong Kong ranks #31 globally for ransomware attacks, with 104 victims in our database.

Sector context: Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Ransomhouse 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 16, 2026 10:00 UTC.

Frequently Asked Questions

Was OCI International Holdings attacked by ransomware?

Yes. OCI International Holdings was listed as a victim of the Ransomhouse ransomware group on October 23, 2025. The organisation is based in Hong Kong and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked OCI International Holdings?

OCI International Holdings was attacked by Ransomhouse ransomware. Ransomhouse is one of the most active ransomware groups, having claimed 148 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the OCI International Holdings ransomware attack occur?

The ransomware attack on OCI International Holdings was disclosed on October 23, 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 OCI International Holdings ransomware attack?

The specific data stolen from OCI International Holdings 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 Financial Services organisation, OCI International Holdings likely held financial records, client data, and transaction histories.

How can organisations protect against Ransomhouse attacks?

To defend against Ransomhouse 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.