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French Bank Crédit Mutuel Arkéa Confirms Cyberattack; ZachXBT Rules Out Lazarus Link

2 reports1 sources11/5/2026 updated

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AI overview

French bank Crédit Mutuel Arkéa has confirmed a cyberattack and acknowledged that suspected losses are on the order of $133 million, while declining to disclose the exact amount. The admission follows on-chain investigator ZachXBT’s earlier flagging of the suspected losses at roughly the same figure. ZachXBT said he is highly confident that the attackers are not connected to North Korea’s Lazarus Group. The bank’s public confirmation does not attribute the incident to any specific actor, and it has not endorsed or rejected ZachXBT’s conclusion about the perpetrator’s identity.

Written with AI from the reporting · updated 11/5/2026

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Story route

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  1. 1Unclassified fact stationNov 4, 13:48single sourcereport-time only

    ZachXBT判断法银行攻击者非Lazarus

    Read original source ↗ The BlockReplay this moment in the explorer
    Evidence & revisions · 1 source records
    Subject：
    ZachXBT
    Action：
    判断
    Object：
    攻击者与北朝鲜 Lazarus Group 无关
    Occurred (fact side)：
    not recorded
    The Block ↗Report pageOriginal / first version
    Published (valid side)：
    Nov 4, 12:57
    First seen (known side)：
    Nov 4, 13:48
    Fact stationSingle source · one-sided claimReport-time only

    Copy may have been revised later; time replay is bounded. Layer labels group reading only, not causation between layers.

  2. 2Unclassified fact stationNov 5, 12:08single sourcereport-time only

    法银确认网络攻击，承认约1.33亿美元损失量级

    Read original source ↗ The BlockReplay this moment in the explorer
    Evidence & revisions · 1 source records
    Subject：
    Crédit Mutuel Arkéa
    Action：
    确认网络攻击
    Object：
    约1.33亿美元疑似损失的量级
    Occurred (fact side)：
    not recorded
    The Block ↗Report pageOriginal / first version
    Published (valid side)：
    Nov 5, 12:01
    First seen (known side)：
    Nov 5, 12:08
    Fact stationSingle source · one-sided claimReport-time only

    Copy may have been revised later; time replay is bounded. Layer labels group reading only, not causation between layers.

Uncertainty marks flag where to check the sources; they are not proven causation.

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Nov 5
  1. The BlockRelated fact: single sourceFact occurrence time unverified
    Crédit Mutuel Arkéa confirms cyberattack after ZachXBT flags $133M in suspected losses

    Report first recorded Nov 5, 12:08

    Read original source ↗
Nov 4
  1. The BlockRelated fact: single sourceFact occurrence time unverified
    ZachXBT says French bank Crédit Mutuel Arkéa was exploited for over $133 million

    Report first recorded Nov 4, 13:48

    French bank Crédit Mutuel Arkéa was exploited for over $133 million, according to ZachXBT. ZachXBT said he has a high degree of confidence that the attacker is not associated with North Korea's Lazarus Group.

    Read original source ↗

Event activity trend

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10Nov 5, 13:00
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