Korean trader: Upbit hot wallet addresses built positions before WIF and VVV listings, suspected wash trading

A Korean crypto trader, Definalist, posted on social media on May 12, saying that during Upbit’s listing process for WIF and VVV in the recent period, it found several addresses that had been funded via deposits from Upbit’s hot wallets. These addresses allegedly bought the tokens before their listing on Upbit and then quickly sold them after the tokens were listed, suggesting potential “front-running” behavior by a mouse account.

Definalist’s Allegation Details

According to Definalist’s public post on social media, its core allegations include: before WIF and VVV were officially listed on Upbit, several addresses funded by Upbit hot-wallet deposits carried out accumulation positions; after the tokens were listed, the aforementioned addresses immediately dumped (sold off) their holdings. In the post, Definalist also noted that during Upbit’s intensive testing period for STABLE tokens, those wallets showed related buying activity as well. Definalist’s above allegations have not yet been verified by any independent third-party on-chain analysis firm, and no official response from Upbit has been seen either.

Dunamu and Bithumb Win Court-Scheduled Delays Against FIU Enforcement

According to reports, a Korean exchange recently took legal action to counter the enforcement decision of the Financial Intelligence Unit (FIU). In early April 2026, the Seoul Administrative Court of first instance overturned part of the FIU’s business suspension and rectification order against Upbit’s operating company Dunamu. The FIU’s reason was that between August 2022 and August 2024, Dunamu failed to declare and register virtual asset service providers (VASPs) for transactions under 1 million KRW, for which it imposed a three-month partial suspension and a hefty fine. The court held that FIU’s interpretation of the violation standards and the basis for the suspension were not clear enough; the FIU has filed an appeal against the above ruling.

On April 30, 2026, the Seoul Administrative Court also accepted Bithumb’s application for a stay of execution, ruling to suspend enforcement of FIU’s partial suspension order against Bithumb for up to six months (FIU imposed the six-month partial suspension and a 36.8 billion KRW fine in March 2026, citing insufficient fulfillment of KYC obligations and undeclared VASP transactions), until 30 days after the judgment in this case.

DAXA Protests Proposed Threshold Revisions for Suspicious Transaction Reporting

According to reports, the Korean top five crypto exchanges’ self-regulatory organization, DAXA, submitted opposition to an amendment to the “Act on Reporting and Use of Specific Financial Transaction Information” promoted by regulatory authorities. The amendment would place crypto asset transfers exceeding 10 million KRW (about $6,800) uniformly within the scope of suspicious transaction reporting (STR).

DAXA’s core objection is that, based on its simulated estimates, if the amendment is implemented, the annual STR transaction volume of Korea’s top five KRW exchanges would surge from about 630,000 transactions to about 5.445 million transactions—an increase of about 85 times. DAXA believes this requirement exceeds the authorization under higher-tier legislation, and also points out that large numbers of low-quality signals could undermine FIU’s ability to identify truly high-risk transactions.

FAQ

What is the core basis for Definalist’s accusation that Upbit engaged in mouse-account “front-running”?

According to Definalist’s social media post, its basis is that on-chain address tracking shows that several addresses funded by Upbit hot-wallet deposits accumulated positions before WIF and VVV were officially listed on Upbit, and then quickly sold them off after the listing. During the STABLE token testing period, the same (or similar) addresses allegedly had purchase records as well. These allegations have not been independently verified to date, and Upbit has not issued any response.

What is the core reason Dunamu (Upbit) won the court ruling?

According to reports, the Seoul Administrative Court’s first-instance decision in April 2026 to revoke FIU’s partial suspension order against Dunamu was based on the view that FIU’s interpretation of the violation standards and the basis for the suspension were not clear enough, making it difficult to directly determine that Dunamu’s conduct was intentional or involved serious negligence. FIU has appealed the above ruling.

What are DAXA’s main reasons for opposing the amendment to the “Act on Reporting and Use of Specific Financial Transaction Information”?

According to DAXA’s public opinion, the amendment would place crypto asset transfers exceeding 10 million KRW into the STR scope. DAXA’s simulated estimates show that the annual STR transaction volume would increase by about 85 times (from 630,000 to 63k transactions). DAXA believes this goes beyond the authorization of higher-tier law, and could also weaken the anti-money laundering system’s ability to identify truly suspicious transactions.