Renesas Electronics Suffers Ransomware Attack by CoinbaseCartel
Renesas Electronics, a Japanese semiconductor manufacturer, fell victim to a ransomware attack by the CoinbaseCartel group.
Key points
- Renesas Electronics, a Japanese semiconductor manufacturer, was attacked by the CoinbaseCartel ransomware group.
- The attack was claimed and discovered on December 6, 2025.
- CoinbaseCartel threatened to release sensitive data, including semiconductor documentation, wafer specifications, yield analysis reports, and manufacturing intelligence.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
Organization
- Published
- Dec 6, 2025
- Updated
- Jul 2, 2026
- Confidence
- High
- Evidence
- 3 sources
Structured assessment
Signal analysis
This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch ransomware, endpoint compromise and business interruption exposure.
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
Renesas Electronics, a Japanese semiconductor manufacturer, fell victim to a ransomware attack by the CoinbaseCartel group. The group claimed responsibility on December 6, 2025, threatening to release sensitive data if their demands were not met. The breach was discovered on the same day. Renesas is investigating the extent of data exfiltration, which allegedly includes semiconductor documentation and manufacturing intelligence.
When was this signal reported?
Shadow Tier lists Dec 6, 2025 as the signal date.
Which organization is connected to this signal?
Renesas is the organization connected to this public signal.
Explore RenesasWhich attack pattern is relevant?
This signal is connected to current ransomware incidents based on its reported incident context.
Explore current ransomware incidentsWhich impact area is relevant?
This signal is connected to data exposure and breach intelligence based on its reported consequences.
Explore data exposure and breach intelligenceRelated signals
Compare shared topics, actors and incident patterns before opening the full signal.
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