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Ethereum Drains $40M in Multisig Heist

Crypto Attacker Drains Multisig Wallet of Up to $40 Million

  • A whale’s multisig wallet was compromised minutes after its creation, resulting in losses of approximately $27.3 million.
  • The attacker has laundered around $12.6 million (4,100 Ether) through Tornado Cash and retains about $2 million in liquid assets.
  • New investigations suggest total losses may exceed $40 million, with theft signs dating back to November 4.
  • The multisig wallet was configured as a “1-of-1,” allowing a single signature for transactions, which is not typical for multisig setups.
  • Around $25 million in assets remain on the compromised wallet still under the attacker’s control.

The incident highlights vulnerabilities within multisig wallets, particularly when improperly configured, and raises concerns about security practices among users and developers alike.

In total, the attacker has managed to drain up to $40 million from the wallet while retaining significant assets under their control. (Source)

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