On July 24, 2025, Taiwan-based trading platform WOO X became the latest victim in a bruising summer of crypto breaches when attackers made off with roughly $14 million in unauthorized withdrawals from nine user accounts, forcing the exchange to pause withdrawals while it investigated and promised to reimburse affected users.
New chain-analysis shared by Yehor Rudytsia, Head of Forensics and Incident Response at Hacken, paints the post-heist picture as far more organized than a one-off theft. According to Rudytsia, the exploit, which Hacken dates to July, resulted in total losses of about $14 million and was carried out by a DPRK-linked actor tracked in law-enforcement circles as “TraderTraitor.”
Hacken says it is actively monitoring the on-chain movements and is supporting recovery efforts by flagging malicious addresses to the wider security community. The laundering choreography, as mapped by Hacken, left half the stolen funds on EVM networks and the rest on Tron and Bitcoin.
In the last 24 hours, on-chain traces show that the bulk of the EVM-side proceeds, more than $7 million, were routed through THORChain and swapped into Bitcoin, a technique observers have increasingly flagged as a common laundering path after major exchange thefts earlier this year. Rudytsia noted that THORChain’s native cross-chain swap functionality has repeatedly been used to convert large sums of ETH and ERC-20 tokens into BTC, making it attractive to sophisticated operators moving stolen assets across ecosystems.
On-chain Evidence
Hacken’s report also documents the handling of the Tron-denominated portion (about $2.5 million in TRX). Those funds, the team found, were converted into USDT, bridged to Ethereum via LayerZero infrastructure, and from there, some of the bridged USDT was again pushed to Bitcoin through THORChain.
On-chain evidence of a nine-figure USDT transfer arriving on Ethereum from a LayerZero executor appears in public transaction records from October 1, 2025, which match the pattern Hacken described.
Complicating the trail, part of the funds that surfaced on Ethereum were sent to a wallet previously tied to the BingX hot-wallet exploit in 2024, itself attributed by investigators to North Korean-linked groups, suggesting either reuse of laundering infrastructure or coordination across multiple thefts.
The address that received those transfers is publicly visible on Ethereum explorer records, and investigators say the link deepens the picture of an organized laundering chain connecting multiple high-profile incidents.
Taken together, the movements indicate that roughly $8–9 million from the WOO X breach was bridged on the same day from Ethereum to Bitcoin, almost entirely via THORChain, leaving an estimated 90% of the stolen value now sitting on Bitcoin addresses as perpetrators accelerate conversion into the oldest and most liquid on-chain asset.
Security teams monitoring the flows warn that once funds consolidate on Bitcoin, conventional tracing and intervention become harder and the risk of eventual cash-out increases. Rudytsia told Blockchain Reporter that Hacken is continuing to monitor the accounts and will push flagged addresses to exchanges and compliance partners in the hope of freezing or otherwise freezing flow paths where possible.
For now, the case is a fresh reminder that as cross-chain tooling gets more powerful, it also gives sophisticated attackers faster, lower-friction routes to turn stolen tokens into harder-to-trace assets, and that forensic work on multiple chains, together with cooperation from on- and off-ramp services, remains the only immediate line of defence in today’s time.
Source: https://blockchainreporter.net/north-korea-linked-actor-accused-of-14m-woo-x-theft-rapid-btc-conversion-reported/
