Sumitomo Electric Bordnetze SE
bd_e3eabb25a2af020e · schema v1 · pii pii-v1
Full breach record for Sumitomo Electric Bordnetze SE →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Aurora on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.
Source: Ransomware.live
Post text · scraped from the leak site
[electric] *** SE (SEBN) — a Wolfsburg-headquartered subsidiary of Sumitomo Electric Industries (TSE:5802, ~$31B group revenue), employing approximately 40,000 people across 14 countries. Exfiltrated 1.1 terabytes of data from five manufacturing sites. SEBN Moldova (103 GB) — HR, payroll, personal tax records, competition-council litigation files, home directories SEBN Ukraine (115 GB) — HR/salary, Audi B9 project data, process documentation, including displaced-worker records for Ukrainian IDPs SEBN Tunisia — Fejja (191 GB + 493 GB shared) — passport copies, email archives (671 MB PST), quality/FMEA data, finance SEBN Slovakia (268 GB) — the crown jewel: Citibank corporate banking infrastructure including the TESTKEY authentication system, IBAN registries, daily bank statements, SAP salary-payment files, and years of department email archives The dataset contains 173,000 Excel files, 149,000 PDFs, 2,500 CAD engineering drawings, 2,500 Outlook messages, 1,500 FMEA/PPAP quality files, and 9 Outlook PST archives.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Jun 16, 2026
Claim posted
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No filing yet · watching
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
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Compliance clock
Not assessable
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
No regulatory filing corroborates this yet — it is the attacker's own assertion. Watch this entity to be notified the moment a filing corroborates or contradicts it.
Source ceiling
- actor name
- victim claim
- ransom/leak status
- discovery date
- materiality
- notification
- affected count
- confirmed data types
- compliance clock
The ✕ fields stay blank until a regulatory filing or victim disclosure lands.
aurora
According to ransomware.live, Aurora is a ransomware group associated with a multi-purpose Go-based malware distributed by multiple criminal teams from mid-2022, also sold as an infostealer/botnet under the same name on underground forums.