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Contract Address: 0x1Db92e2EeBC8E0c075a02BeA49a2935BcD2dFCF4 Contract Type: Proxy Contract (Gnosis Safe Proxy) Compilation Version: Solidity 0.5.3 Deployment Date: January 13, 2020 Main Contract: Relies on the masterCopy address through delegatecall proxy Contract Structure and Functionality Operates as a proxy contract, meaning it does not execute transactions directly. All function calls are forwarded to a master contract. Functions like execTransaction are executed through this proxy. The fallback function uses delegatecall to forward all incoming calls. Contract Functions and ABI Constructor: Accepts a _masterCopy (address) parameter. Defines the master contract address for transaction delegation. Fallback Function: Forwards all incoming calls to the master contract. If the masterCopy address is modified, arbitrary code execution becomes possible. ABI: --------------------- [ { "inputs": [ {"internalType": "address", "name": "_masterCopy", "type": "address"} ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "payable": true, "stateMutability": "payable", "type": "fallback" } ] --------------------- Deployed Bytecode Overview Deployed Bytecode SourceMap:Contains delegatecall operations. Stores the masterCopy address in the first storage slot. Forwards all calls to the master contract. Palkeoramix Decompiler Analysis Key Variable: stor0 → Holds the masterCopy address. Fallback Function: *Recognizes function calls with hash 0xa619486e and returns the masterCopy address. *Uses delegatecall to execute functions on behalf of the proxy. Potential Risks and Vulnerabilities ✔ If the master contract is modified, the entire system could be compromised. ✔ Multi-signature security measures could be disabled. ✔ There are no built-in security checks, meaning unauthorized modifications are possible. ✔ Transactions routed through execTransaction() could be manipulated to bypass signature requirements. This contract follows a Gnosis Safe Proxy structure, meaning it does not execute any logic on its own but instead forwards all function calls to a master contract, which can be modified, potentially allowing unauthorized operations. Possible Scenarios Multi-signature requirements may have been disabled, allowing transactions to be approved with a single signature. Funds were withdrawn from the cold wallet using the sweepETH and sweepERC20 functions. The removal of authorized wallets before the attack increases the likelihood of insider involvement. Analyzing the ChangedThreshold, AddedOwner, and RemovedOwner event logs could reveal changes made before the attack. Conspiracy Theories and Insider Involvement Possibility A privileged individual may have shared private key information:Transactions were executed with a single signature, bypassing the multi-signature mechanism. A security vulnerability in cold wallet management:Normally, withdrawals require prior approval, but these transactions were executed instantly. Final Assessment ❌ If the multi-signature wallet is dynamically configurable, some settings may have been altered to reduce the required number of signatures to one. ❌ However, in most cases, the initial multi-signature configuration cannot be changed. ❌ The contract may have been flawed from the beginning, making it vulnerable to exploitation. #Bybit #BybitHack #BybitHacker #Ethereum #Crypto #CryptoScam #CryptoNews #cryptocurrency $Eth #Bitcoin $BTC #CDDStamp $CDD