As the largest blockchain platform that supports smart contracts, Ethereum has developed with an incredible speed. Yet due to the anonymity of blockchain, the popularity of Ethereum has fostered the emergence of various illegal activities and money laundering by converting ill-gotten funds to cash. In the traditional money laundering scenario, researchers have uncovered the prevalent traits of money laundering. However, since money laundering on Ethereum is an emerging means, little is known about money laundering on Ethereum. To fill the gap, in this paper, we conduct an in-depth study on Ethereum money laundering networks through the lens of a representative security event on \textit{Upbit Exchange} to explore whether money laundering on Ethereum has traditional traits. Specifically, we construct a money laundering network on Ethereum by crawling the transaction records of \textit{Upbit Hack}. Then, we present five questions based on the traditional traits of money laundering networks. By leveraging network analysis, we characterize the money laundering network on Ethereum and answer these questions. In the end, we summarize the findings of money laundering networks on Ethereum, which lay the groundwork for money laundering detection on Ethereum.
翻译：作为支持智能合约的最大区块链平台，以太坊发展迅猛。然而，由于区块链的匿名性，以太坊的普及催生了各种非法活动和洗钱行为，通过将非法资金转换成现金进行洗钱。在传统的洗钱情景中，研究人员已经揭示了洗钱的普遍特征。然而，由于以太坊上的洗钱还是一个新兴手段，对于以太坊上的洗钱了解甚少。为填补此空白，在本文中，我们通过代表性安全事件（\textit{Upbit Exchange}）的视角，对以太坊洗钱网络进行了深入研究，以探索以太坊上的洗钱是否具备传统特征。具体而言，我们通过爬取\textit{Upbit Hack}的交易记录，构建了以太坊上的洗钱网络。然后，我们提出了五个基于洗钱网络的传统特征的问题。通过利用网络分析，我们对以太坊上的洗钱网络进行了表征并回答了这些问题。最后，我们总结了以太坊上的洗钱网络的研究发现，为以太坊上的洗钱检测奠定了基础。
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