high severity June 16, 2026 · 4 min read Unverified claim — what this is

Sumitomo Electric Bordnetze Listed by Aurora Ransomware Group

If you are a customer of Sumitomo Electric Bordnetze, here’s what is being claimed, and what it would mean for you.

[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), qual
— from Aurora’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

Sumitomo Electric Bordnetze Listed by Aurora Ransomware Group

On June 16, 2026, the aurora ransomware group listed Sumitomo Electric Bordnetze (SEBN) on its leak site and began publishing more than 1.1 terabytes of internal files stolen from five manufacturing sites across Moldova, Ukraine, and Tunisia.

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Reported Details of the Breach

SEBN is a Wolfsburg-headquartered subsidiary of Sumitomo Electric Industries, part of a group that generates roughly $31 billion in annual revenue and employs approximately 40,000 people in 14 countries. Public reporting indicates the attackers exfiltrated data from SEBN Moldova (103 GB), SEBN Ukraine (115 GB), and SEBN Tunisia’s Fejja facility (191 GB plus 493 GB of shared storage).

The exposed material includes HR records, payroll files, personal tax records, home-directory contents, competition-council litigation documents, and displaced-worker records for Ukrainian IDPs. Also taken were passport copies, email archives (671 MB of PST files), Audi B9 project data, process documentation, and additional internal files. The aurora leak site, tracked by ransomware.live, is the primary public source of this information.

Why This Matters for You and Your Family

When a company’s payroll, tax, and passport data leak, the people whose names, addresses, dates of birth, national ID numbers, and salary details appear in those files become immediate targets. If you or anyone in your household works at an automotive supplier, has relatives employed by SEBN, or lives in one of the affected regions, your family’s personal information may now be circulating among criminals.

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Report details & sourcing

Attributed to Aurora · 45 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed June 16, 2026

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

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Aurora — 45 incidents tracked

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