United States v. 113 Virtual Currency Accounts

District Court, District of Columbia·Decided March 5, 2024·No. Civil Action No. 2020-0606·Published

Opinion

UNITED STATES DISTRICT COURT FOR THE DISTRICT OF COLUMBIA

UNITED STATES OF AMERICA, Plaintiff,

v.

Civil Action No. 20-606 (TJK)

113 VIRTUAL CURRENCY ACCOUNTS et al.,

Defendants.

MEMORANDUM OPINION

The United States seeks the forfeiture of 145 virtual currency accounts containing funds linked to alleged hacks of virtual currency exchanges by North Korean operatives. It alleges that, following those hacks, these accounts were each involved in a conspiracy to engage in three types of money laundering—concealment, promotion or international promotion money laundering—or are otherwise traceable to such property. For the reasons explained below, the Court will grant the United States’ motion for default judgment and order forfeiture of these virtual currency accounts, referred to as the Defendant Properties. 1 Background A. Virtual Currency Bitcoin, Ether, and other so-called “cryptocurrencies” are types of virtual currency used in online transactions. ECF No. 24 (“Sec. Am. Compl.”) ¶ 7. To send and receive funds, customers use unique addresses that function like email addresses: one user may have many and may even use a different one for each transaction. Id. ¶ 8. A customer must have a password, called a

1 The United States has dismissed Defendant Property 146 from this action. ECF No. 35.

“private key,” to transfer funds held at an address. Id. ¶ 9. Customers often conduct transactions on virtual currency exchanges, which are platforms offering trading between the U.S. dollar, foreign currencies, and virtual currencies. Id. ¶ 11. Exchanges also commonly offer virtual currency storage services to customers. Id.

Although transactions are recorded on a public ledger called a “blockchain,” the transacting parties are usually anonymous because each transaction is labeled with a complex series of numbers and letters, rather than individuals’ names or other identifying information. Sec. Am. Compl. ¶ 7. Law enforcement can, however, identify the parties through analysis of the blockchain. Id. ¶¶ 7, 12. Specifically, investigators create large databases that group transactions into “clusters” based on patterns identified in transaction data. Id. ¶ 12. Some individuals hoping to elude such analysis will conduct “peel chains.” Id. ¶ 15. A peel chain occurs when a large quantity of virtual currency stored at one address is transmitted through a succession of other addresses. Id. ¶ 13. During each transaction, a small, inconsistent amount of virtual currency is “peeled off” into an exchange where the individual ultimately wants the virtual currency deposited. Id. The transactions continue until all the funds originally held at the first address are peeled off into the target exchange. Id. Sophisticated criminals often use peel chains comprising hundreds of transactions to hide the path of funds on the blockchain. Id. ¶ 15.

B. The North Korean Hacks and Money Laundering In a 2019 report, a panel of experts established by the U.N. Security Council identified a series of hacks sponsored by North Korea targeting virtual currency exchanges. Sec. Am. Compl. ¶¶ 16–20. According to the panel, North Korean operatives routinely use large-scale cyberattacks to infiltrate accounts hosted by exchanges and other financial institutions. Id. ¶ 17. They then force transfers and launder stolen virtual currency through an elaborate series of transactions before converting it into fiat currency. Id. ¶ 19. The attacks raise money for North Korea’s

weapons of mass destruction programs, with total proceeds at the time of the report estimated at up to $2 billion. Id. ¶ 17.

This case arises out of the United States’ investigation of similar hacks of four virtual currency exchanges, allegedly by North Korean operatives. Sec. Am. Compl. ¶¶ 2, 21. According to the Second Amended Complaint, in late 2018, U.S. authorities learned that Exchange 1 had been hacked and that the perpetrators had stolen almost $250 million in virtual currencies, including Bitcoin. Id. ¶ 27. To begin the attack, a person pretending to be a potential customer contacted an employee of the exchange. Id. ¶ 28. The employee unknowingly downloaded malware during the interaction, thereby providing the hackers with remote access to private keys. Id. ¶¶ 28, 30. Once the perpetrators used those keys to steal virtual currency, they covered their tracks by conducting hundreds of automated transactions in a peel chain layering process where much of the currency passed through, or was deposited into, the Defendant Properties. Id. ¶¶ 31–47.

Eventually, much of the stolen Bitcoin was deposited into four accounts on two exchanges (Defendant Properties 56, 62, 67, and 70). Sec. Am. Compl. ¶ 59. These accounts belonged to two individuals, Tian Yinyin and Li Jiadong, who have been indicted for money laundering and operating an unlicensed money transmitting business in a separate case before the Court, United States v. Tian, 20-cr-52 (TJK). 2 Id. ¶ 60. From 2018 to April 2019, Tian and Li engaged in $100,812,842.54 in virtual currency transactions, consisting primarily of virtual currency traceable to the hack of Exchange 1. Id. ¶ 62. After receiving stolen funds via peel chains from the North Korean operatives, Tian and Li further laundered the money by moving it between each other’s accounts and exchanging some for prepaid iTunes gift cards, a recognized method of money

2 In all, Tian and Li owned over two dozen of the Defendant Properties: 55–62, 65–80, and 83–84. Sec. Am. Compl. ¶ 100.

laundering. Id. ¶¶ 67, 70–71. The two then set up multiple accounts at Chinese banks where they ultimately deposited the proceeds. Id. ¶¶ 64, 73.

Around December 2017, Exchange 2 announced that 17% of its total assets had been stolen in a hack that the U.N. Security Council’s expert panel attributed to North Korean actors. Sec. Am. Compl. ¶ 78–79. Some of Tian’s accounts were also used to launder the proceeds from the hack of this exchange, as were other accounts that had been used before to send funds to North Korean co-conspirator accounts. Id. ¶¶ 77, 81–82. About two years later, $48.5 million in virtual currency was stolen from Exchange 3, a South Korea-based exchange. Id. ¶ 83. Over the next several days, that money was transferred through multiple peel chains before being deposited into various exchanges. Id. ¶ 84. For instance, a portion of the stolen currency was deposited into Defendant Property 82 via several transactions about a week after it was stolen. Id. Some of the currency ended up in other Defendant Properties. Id. ¶¶ 86–90. In addition, in summer 2018, North Korean operatives stole about $30 million in virtual currency from Exchange 4, another South Korean exchange, and funds from this hack were deposited into accounts that controlled some of the Defendant Properties. Id. ¶¶ 36, 41.

C. Illegal Money Transmitting Business As already noted, Tian and Li engaged in many transactions using funds traceable to the hack of Exchange 1. Sec. Am. Compl. ¶ 62. To do so, they would convert virtual currency into fiat currency for their clients in exchange for a fee. Id. Some of their clients were in the United States, and they sometimes used United States financial accounts to provide conversion services. Id. ¶ 98. An advertisement described their operation as a professional business and listed hours of operation and payment information. Id. ¶ 72. Despite transacting with clients and financial accounts based in the United States, Tian and Li never registered their operation with the Financial

Crimes Enforcement Network (FinCEN) as a money transmitting business as required by law. Id. ¶¶ 69, 99.

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