Wintermute reported that hackers stole about $160 million from its decentralized finance (DeFi) operations on September 20, 2022. The firm said its centralized finance (CeFi) and over-the-counter (OTC) businesses were unaffected and that it remained solvent. Contemporary reporting tied the incident to an Ethereum vault’s administrator address and retained signing authority; the specific theory that attackers derived its key from a Profanity vanity address was an analyst hypothesis, not a confirmed forensic finding.
How did Wintermute get hacked?
The incident centered on an Ethereum vault’s administrator address: an address with authority to sign transactions and take other actions affecting the vault. Wintermute founder and CEO Evgeny Gaevoy told The Block that, as the firm moved away from its old setup, it transferred ETH out of the address but failed to remove the address’s ability to sign and act. That left authority associated with the old address in place.
Gaevoy also said the trading operation’s high-frequency needs meant Wintermute did not use safeguards such as 2FA-protected key generation or multisignatures in that setup. These are the company’s reported explanations of the incident, not an independently verified account of every step in the compromise.
Was the Profanity vanity address involved?
The Block reported that the affected vault’s administrator address had been generated with Profanity, a tool for creating vanity addresses, and began with 0x0000000. Contemporary security analysts hypothesized that a weakness associated with Profanity let an attacker derive the admin private key and drain the vault. That proposed attack vector was not established as a settled forensic conclusion: The Block noted at the time that Wintermute had not published an official post-mortem.
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How much was stolen, and what was affected?
Wintermute reported a loss of about $160 million from its DeFi operations. Gaevoy said 90 assets were affected. In a statement reported by TechCrunch on September 20, 2022, he said only two of those assets had notional value above $1 million and none exceeded $2.5 million; these were his figures, not independent audit results.
Gaevoy said Wintermute’s CeFi and OTC operations were unaffected. He also said the company had twice the loss amount in equity and remained solvent: “We are solvent with twice over that amount in equity left.” Those are company assurances reported at the time, not independently established balance-sheet data.
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What did Wintermute do after the theft?
Wintermute offered a 10% bounty for the return of the stolen assets, reported as $16 million in USDC if all funds were returned, and sent an on-chain request asking for the remainder to be returned. The cited contemporary reports do not establish the eventual recovery outcome.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the incident shows about vault access
The reported account highlights two distinct security questions: how an administrator key was generated and whether an old address’s signing authority was actually revoked when the firm moved away from it. A vault can remain exposed if an address retains permission to act, even after assets are moved. At the same time, the reporting connected the firm’s choices to operational demands: Gaevoy said high-frequency trading needs informed the decision not to use certain safeguards. The sources do not establish that any single control would, by itself, have prevented this specific incident.
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