Hacker Launders $19.4M in ETH via Tornado Cash After $27.3M Multi-Sig Theft

This article was first published on Deythere.

A large Ethereum theft is now shifting from the shock phase into the part investigators hate most: the clean-up. On January 6, 2026, blockchain security monitors flagged that an attacker who drained roughly $27.3 million from a compromised multi-signature wallet has already pushed 6,300 ETH, valued around $19.4 million, into Tornado Cash.

The detail that makes this case linger is not only the size. It is the posture. Instead of simply converting and disappearing, the attacker appears to be treating the stolen wallet like a working account, moving in measured steps, using DeFi rails, and keeping risk on the table.

The Route: Theft, Then a Mixer, Then DeFi

The reported stolen assets included ETH and DAI, and the laundering pattern looks deliberate rather than frantic. After the breach, on-chain watchers say the attacker continued routing funds into Tornado Cash, a protocol designed to break the transaction trail on Ethereum by pooling deposits and enabling later withdrawals that are harder to link.

One datapoint in the latest movement stands out. The attacker reportedly withdrew 1,000 ETH, about $3.24 million, from Aave and then funneled that ETH through Tornado Cash.

That choice matters because it hints at a second layer of intent: using lending infrastructure not just as a place where funds sit, but as a way to manage liquidity and timing. In traditional finance terms, it resembles someone moving money through a credit line to control when and how value leaves the building.

The Risky Twist: A Leveraged Long Still Sitting Open

Most theft stories end with a single question: Where did the money go? This one adds another: what is the attacker trying to do with it before the trail goes cold?

On-chain reporting tied to the incident indicates the attacker still holds a leveraged long position valued at around $9.75 million on Aave. The position is described as roughly $20.5 million in ETH posted as collateral against about $10.7 million borrowed in DAI. A reported health factor near 1.58 suggests the position is active and not immediately collapsing, but it is not cushy either.

In plain terms, it means the wallet is not only a laundering endpoint. It is also a trading vehicle that can be hurt by a sharp move down in ETH. That creates a strange dynamic for the market: if ETH drops hard enough, liquidation mechanics could force collateral sales, which can amplify volatility. Traders do not need to sympathize with an attacker to recognize how forced liquidations can ripple through liquidity pools and order books.

The Indicators Traders Watch in a Case Like This

When an incident involves both a mixer and an active leveraged position, several indicators become unusually useful, even for people who are not doing on-chain forensics for a living.

First is the flow rate into the mixer. A one-time deposit can be opportunistic, but repeated deposits, like the reported 6,300 ETH total, often signal a methodical clean-out schedule.

Second is the lending position health. Aave positions live and die by collateral value. If ETH price softens, the health factor can slide toward liquidation territory, and that risk is measurable in real time.

Third is stablecoin debt behavior. Borrowed DAI is not just a number, it is a clue. Debt that stays open while collateral is peeled away can indicate the actor is trying to extract value without triggering liquidation too early, almost like removing bricks while hoping the wall stays up.

Tornado Cash Still Sits in the Middle of the Privacy Fight

This laundering episode lands in a politically messy moment for Tornado Cash. In the United States, the Treasury announced it had removed economic sanctions against Tornado Cash in March 2025 following litigation and a broader policy review, while still emphasizing concern about illicit use.

That does not make Tornado Cash “clean.” It does, however, underline why the debate refuses to die. Privacy tools have legitimate uses, but high-profile laundering incidents keep pulling the conversation back to enforcement, compliance expectations, and where responsibility begins and ends when software is open and decentralized.

Conclusion

This case is a reminder that security is rarely defeated by one dramatic exploit alone. It is defeated by a chain of small weaknesses, and once an attacker has control, the exit routes are mature, liquid, and fast.

With $27.3 million stolen, $19.4 million reportedly routed through Tornado Cash, and an active leveraged position still open on Aave, the incident has moved beyond a simple hack headline into a live on-chain situation that can evolve with the market.

As long as the attacker continues to unwind positions and move funds in batches, the story remains less about what happened yesterday and more about what the blockchain might reveal next.

FAQs

What is a multi-signature wallet, and why is this theft alarming?

A multi-signature wallet requires multiple approvals before funds move, which is meant to reduce single-key failure. This theft is alarming because it suggests the attacker gained enough access to bypass that safeguard, turning a “safer” setup into something that behaved like a normal compromised wallet.

Why do attackers use Tornado Cash after a theft?

Mixers are used to obscure the transaction trail by pooling deposits and enabling withdrawals that are harder to link. In this case, the reported 6,300 ETH deposited is a strong signal of an effort to reduce traceability.

What does a leveraged long position mean in this context?

A leveraged long position is a bet on price going up using borrowed funds. The reported Aave position indicates the attacker is exposed to ETH price swings, and a sharp decline could trigger liquidation.

Glossary of Key Terms

Aave: A decentralized lending protocol where users can supply crypto, borrow against collateral, and manage leveraged positions through overcollateralized loans.

DAI: A U.S. dollar-pegged stablecoin commonly used in DeFi for borrowing, lending, and trading strategies.

Health factor: A risk metric used by lending protocols like Aave that signals how close a position is to liquidation, based on collateral value and outstanding debt.

Liquidation: The automated selling of collateral when a borrower’s position becomes too risky, designed to protect lenders from losses.

Multi-signature wallet: A wallet that requires multiple approvals (multiple keys or signers) to authorize transactions, intended to reduce single-point compromise risk.

On-chain: Data and activity recorded directly on a blockchain, such as transfers, contract interactions, and lending positions.

Tornado Cash: A privacy protocol on Ethereum designed to obscure transaction links by mixing deposits and withdrawals, frequently debated due to both legitimate privacy use and criminal laundering activity.

References 

CoinoMedia

The Crypto Times