# Qilin ransomware claims Onsemi breach

Published: 2026-10-05 · Severity: high · Sectors: manufacturing, technology
Canonical: https://vorant.io/reports/ead7e800-ad01-54f5-a46b-83661c7452fa/qilin-ransomware-claims-onsemi-breach

> Qilin ransomware group lists semiconductor manufacturer Onsemi as a victim, claiming compromise of employee and user credentials.

Ransomware.live has indexed a Qilin ransomware group claim against Onsemi (ON Semiconductor), a major semiconductor manufacturer. The listing cites compromise of 193 employees, 897 users, and 78 third-party employee credentials, alongside enumeration of the victim's external attack surface (170 items) and DNS records. The entry appears to be a leak-site posting typical of ransomware extortion operations, providing a leak screenshot as proof of compromise.

No technical details on the initial access vector, exploited vulnerabilities, or specific malware used in the intrusion are provided in this listing. The data suggests credential compromise may have played a role, potentially involving infostealer-sourced credentials as referenced by the sponsoring vendor's tooling. Defenders in the semiconductor and broader manufacturing/technology sector should treat this as a reminder to monitor for Qilin ransomware group activity, validate credential hygiene, and check for exposure of employee credentials via infostealer logs.

As this is a leak-site listing rather than a detailed technical writeup, defenders should await further reporting for IOCs, TTPs, or confirmed attack chain details. Organizations with third-party relationships to Onsemi should assess potential downstream exposure given the reported third-party credential compromise.

## Mentioned in this report

- Threat actors: qilin
- Malware: Qilin

1 more detection for this report is in the app: the rules that match its indicators, every rule converted to Splunk SPL and Elastic, Microsoft Defender XDR KQL wherever Defender records the activity, and the YARA and Suricata. A new account gets three days of them free.

Source reporting: https://www.ransomware.live/id/T25zZW1pQHFpbGlu

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