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Oriental Diamond ransomware causes business stoppage

Oriental Diamond confirmed that a third party used ransomware against a company-managed server on May 4, 2026. Encryption affected the head-office file server and the company explicitly reported a resulting business stoppage. The company also investigated possible personal-data leakage and identified a VPN path as the intrusion route.

67

Estimated severity

67 / 100

—

Source reliability

No information

Approximate Date

04/05/2026

Targeted Company

ORIENTAL DIAMOND

Targeted Company Supply Chain Impact

  1. Distribution & Fulfillment

  2. Procurement & Sourcing

  3. Production & Manufacturing

  4. Sales (Retail & Ecommerce)

  5. Warehousing

  6. Service Delivery

  7. Unrecognized Impact

Supply Chain Relations

No information

Geographic Impact

Country Targeted Company

Japan

JPN

Other Affected Countries

No other affected countries reported

Target country

Japan

Affected countries

Japan

Impacted regions

Tokyo · Japan

Operational Impact

Duration

No information

Financial impact (USD M)

No information

Impact types

Operational disruptionERP or business system disruption

Affected sectors

Wholesale & Distribution

Affected departments

Information Technology

Attack Profile

Attack types

RansomwareUnauthorized access

Attributed threat actors

No information

Sources

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