SystemExec
Data Breach on August 27, 2025
| Data Breach Report | |||
|---|---|---|---|
| Victim | system-exe.co.jp | ||
| Threat Actor | Cephalus | ||
| Date Discovered | Aug 27, 2025 | ||
| Description | SystemExec Co., Ltd. is based in Japan, providing IT services, systems integration, software development, consulting, and infrastructure solutions. | ||
| Leak Size | Unknown |
Credential Exposure for system-exe.co.jp
We've indexed 47 @system-exe.co.jp accounts from external breaches, plus 4 credentials for system-exe.co.jp itself.
Last checked Aug 23, 2026
| @system-exe.co.jp addresses from external breaches | |
|---|---|
| Third-party breaches | 36 accounts · across 13 breaches · 34 with a plaintext password · most recent Mar 14, 2024 |
| Combo lists | 35 accounts · most recent Aug 7, 2026 |
| Passwords for system-exe.co.jp accounts | |
|---|---|
| Combo lists | 3 logins · most recent Aug 21, 2026 |
| Infostealer logs | 2 logins · 1 infected devices · most recent Jul 6, 2026 |
Logins may belong to customers or to staff, and the data doesn't say which. None of this is necessarily connected to the ransomware attack above.
Is your organization next?
SystemExec was breached. Check if your company's credentials have been exposed in this or other data breaches.
Check your exposure →Continuous dark web monitoring alerts you when we find leaked credentials or session tokens for your company.