Zoth, FortuneWheel, and Sorra Finance Exploited for $347K via LTV Mismatch, Unprotected Swaps, and Reward Loops
Zoth lost $285K from a faulty LTV calculation that ignored real collateral amounts. FortuneWheel leaked $21K due to missing access controls on a profit-swap function. Sorra Finance’s $41K loss came from a reward function that didn’t track previous payouts, allowing repeat claims.
In Brief
Zoth was targeted in a $285K exploit due to a flaw in the mintWithStable() function.
FortuneWheel suffered a $21K loss due to an access control vulnerability.
Sorra Finance lost $41K due to a logic vulnerability.
Hacks Analysis
Zoth | Amount Lost: $285K
On March 1, the Zoth exploit on the Ethereum mainnet resulted in a $285K loss due to a logic vulnerability. The attacker targeted a flaw in the mintWithStable() function’s Loan-to-Value calculation. The attacker first used flash loans to manipulate the exchange rate on Uniswap V3. The manipulated rate made the deposit swap for just 7,669 collateral tokens instead of 330,979. The contract looked at the initial deposit amount, not the actual collateral received, letting them mint too much ZeUSD based on the higher 330,979 number. They burned the ZeUSD and withdrew 330,979 collateral tokens, profiting $285K.
On January 10, the FortuneWheel exploit on the Binance Smart Chain resulted in a $21,000 loss. The root cause of the exploit was that the swapProfitFees() function was missing access controls. This function swaps tokens owned by the contract to WBNB via PancakeSwap. Only admins should have access to trade with the contract’s earnings. The attacker traded WBNB for LINK externally, artificially increasing LINK token’s price in the pool. Then, the attacker called swapProfitFees() to swap the contract’s LINK back to WBNB at the higher rate, making a profit.
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Exploited Contract (on BSC): 0x384b9fb6e42dab87f3023d87ea1575499a69998e
On January 4, the Sorra Finance exploit on the Ethereum Mainnet resulted in a $41K loss. The root cause of the exploit was that the getPendingRewards() function failed to track the rewards already paid out correctly. The attacker first deposited 122,868 SOR tokens on December 21, 2024, picking a 14-day lockup (tier 0). After the lockup ended, they called withdraw() repeatedly. This function paid out 6,143 SOR tokens as rewards each time but didn’t mark them as claimed. The contract’s logic failed to subtract userRewardsDistributed[_msgSender()] properly, letting the attacker claim the same rewards multiple times.
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Follow-up: Conduct a follow-up review to ensure that the remediation steps were effective and that the smart contract is now secure.
Follow-up: Conduct a follow-up review to ensure that the remediation steps were effective and that the smart contract is now secure.
In Brief
Remitano suffered a $2.7M loss due to a private key compromise.
GAMBL’s recommendation system was exploited.
DAppSocial lost $530K due to a logic vulnerability.
Rocketswap’s private keys were inadvertently deployed on the server.
Hacks
Hacks Analysis
Huobi | Amount Lost: $8M
On September 24th, the Huobi Global exploit on the Ethereum Mainnet resulted in a $8 million loss due to the compromise of private keys. The attacker executed the attack in a single transaction by sending 4,999 ETH to a malicious contract. The attacker then created a second malicious contract and transferred 1,001 ETH to this new contract. Huobi has since confirmed that they have identified the attacker and has extended an offer of a 5% white hat bounty reward if the funds are returned to the exchange.
