Crédit Mutuel Arkéa é apontada como vítima de roubo cripto de US$ 133 milhões

Blockchain investigator ZachXBT identified Crédit Mutuel Arkéa as the institution affected by a cryptocurrency theft estimated at more than US$ 133 million. The attribution expanded an earlier investigation into suspicious withdrawals from several centralized exchange accounts, which had previously been described only as involving an unnamed European entity. Crypto Adventure reported that the identification was made through ZachXBT’s November 4 disclosure.

Crédit Mutuel Arkéa confirmed that fraudulent operations occurred in a November 4, 2026 announcement, according to Bitcoin.com, Cointribune and Decrypt. The bank’s statement did not mention cryptocurrency, accept the US$ 133 million figure cited by ZachXBT, or say that its systems or digital assets had been compromised, Decrypt reported. Cointribune stressed this distinction, noting that the institution had confirmed a cyberattack without validating the investigator’s loss estimate.

The reported flow of funds differs by outlet. Bitcoin.com said investigators believe unauthorized traditional banking transfers began the operation before the proceeds entered stablecoin-laundering networks. CoinCodex, in turn, described ZachXBT’s tracing of withdrawals from Kraken, Crypto.com and OKX to wallets controlled by the alleged attacker. Cryptopolitan characterized the transactions as large-scale suspicious outflows from an entity’s wallets.

Action around the stablecoins connected to the investigation has been limited but measurable. CryptoPotato reported that Tether froze US$ 1.14 million in USDT, while US$ 2.53 million in USDC linked to the case had not yet been frozen by Circle. Unchained said the attack operated over several days and that the real loss could be larger after accounting for over-the-counter trades, but its report also said the bank had not publicly commented, unlike the later accounts of a confirmed fraud announcement.

Verified supply data from DeFiLlama provides scale for the assets involved in the freezing efforts: USDT had US$ 177.76 billion circulating and USDC had US$ 71.25 billion. The broader crypto market was broadly higher, with total capitalization at US$ 2.75 trillion and Bitcoin up 3.10% over 24 hours. The Fear & Greed Index stood at 34, still in the Fear zone; no price reaction was attributed specifically to this incident.

The unresolved questions concern the scale and mechanism rather than the existence of fraudulent transactions. Relevant follow-up points include whether Arkéa formally links the fraud to crypto transfers, whether additional assets are frozen by Circle and other providers, and whether the inclusion of over-the-counter activity raises the total loss above the US$ 133 million estimate. The discrepancy between the bank’s narrow confirmation and ZachXBT’s broader attribution leaves the final accounting unsettled.