Crédit Mutuel Arkéa hack: $133M traced through crypto exchanges

French banking group Crédit Mutuel Arkéa confirmed a cyberattack involving fraudulent transactions, disclosed in a November 4, 2026 announcement. Blockchain investigator ZachXBT traced more than $133 million in suspected stolen funds through cryptocurrency platforms, with investigators believing the operation started with unauthorized traditional banking transfers before proceeds entered stablecoin laundering. The case highlights how stolen fiat can be funneled into crypto rails, a reputational and compliance risk for exchanges and stablecoin issuers.