Semiconductor manufacturing giant OmniVision Technologies has disclosed a data breach following a ransomware attack it suffered in September 2023.
In a notification letter to the impacted individuals, a copy of which was submitted to the California Attorney General’s Office, the company revealed that the incident was discovered on September 30, 2023, after certain systems were encrypted by malware.
“In response to this incident, we promptly launched a comprehensive investigation with the assistance of third-party cybersecurity experts and notified law enforcement. At the same time, we took proactive measures to remove the unauthorized party and ensure the security of OVT systems,” the notification letter reads.
The investigation was completed on April 3, 2024, and determined that, between September 4 and September 30, the attackers stole personal information from certain OmniVision systems.
While the notification letter does not name the threat actor behind the attack, the Cactus ransomware group claimed responsibility for the incident by adding OmniVision to its leak site in October 2023.
Cactus claimed the theft of roughly 3.5 terabytes of data from the semiconductor manufacturer, and made the data available for download in December, likely as the result of a failed extortion attempt.
The notification does not detail the type of personal information that was compromised in the attack either, but the data leaked by Cactus included confidential documents, non-disclosure agreements, other business documents, and passport scans.
OmniVision is providing the impacted individuals with free credit monitoring and identity restoration services for 24 months. However, the company has not disclosed how many individuals might have been affected by the data breach.
Headquartered in Santa Clara, California, OmniVision manufactures semiconductors for sensing, analog, and touch and display solutions used across a wide range of applications, including medical, security, and consumer devices.
Active for roughly a year, the Cactus ransomware gang is known for encrypting its own malware to evade detection. Earlier this year, the gang claimed responsibility for the attack on Schneider Electric.
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