Unverified leak-site claim: Coinbasecartel names OTEIS Conseil & Ingénierie (FR) — Professional Services

This is not a confirmed breach. This entry records that a ransomware group posted a claim on its own leak site. Matproof has not verified the claim and does not assert that any incident occurred. Such claims are often exaggerated, false, misattributed, or refer to a third party rather than the named organisation. The named organisation has not confirmed it.

If you represent a named organisation and this entry is inaccurate, email legal@matproof.com and we will correct or remove it.

On 2026-08-22, the ransomware group Coinbasecartel, via the leak-site mirror ransomwarelive, posted a claim naming OTEIS Conseil & Ingénierie, a French professional services firm. The posting alleges an incident involving the organisation. This claim has not been confirmed by OTEIS, and leak-site claims are frequently exaggerated, false, or misattributed; the reference may concern a third party rather than the named firm itself.

Compliance teams should treat this as unverified. Do not act on it as a confirmed incident. Contact OTEIS directly and request a written statement addressing the claim. Await their response before taking any further action.