OKX DEX Suddenly Suspends Service: How Exactly Are Hackers Money Laundering?

By: Yue Xiao Yu

If it were a regular service upgrade, users would certainly be notified in advance to avoid panic.

More importantly, products generally do not undergo service suspension for upgrades. Consider that OKX DEX has a daily trading volume exceeding $200 million—the impact of a shutdown would be significant.

All of this points to one plausible explanation: the DEX service was urgently suspended due to regulatory pressure.

Previously, North Korean hackers who stole funds from Bybit used the platform to launder nearly $100 million, suddenly drawing regulatory scrutiny toward OKX DEX.

Information asymmetry leads to user panic; trust comes from transparency.

This article aims to explain the underlying mechanics of OKX DEX. Only by understanding how it works can users form a clearer picture and avoid overreacting or panicking unnecessarily.

1. First question: Can OKX DEX actually be used for money laundering?

At its core, OKX DEX is a transaction aggregator that uses smart order-splitting algorithms to help users find optimal trading routes.

For users, this is an extremely useful tool—but like any powerful technology, it can also be exploited for illicit purposes.

Let’s first examine how OKX DEX's X Routing algorithm works:

(1) Scanning liquidity sources: It collects real-time liquidity data from multiple DEXs (such as Uniswap, Curve, etc.) and cross-chain bridges.

(2) Optimizing trade paths: It calculates the best possible trading route based on price, slippage, and gas fees.

(3) Order splitting: Large trades are broken into smaller ones and distributed across different liquidity pools or routes to minimize market impact and achieve better execution prices.

(4) Single execution: All split sub-orders are executed within one blockchain transaction, ensuring atomicity (either all succeed or all fail).

This design is highly efficient—but these very features could potentially be abused by malicious actors.

2. How exactly do hackers launder money?

Money laundering typically involves three stages: Placement, Layering, and Integration.

The smart order-splitting algorithm of OKX DEX could primarily be exploited during the "Layering" phase.

The algorithm automatically breaks large transactions into multiple small orders, distributing them across various liquidity pools and blockchain networks—e.g., from Ethereum to Polygon or Arbitrum.

This distribution increases the difficulty of blockchain analysis, as funds are fragmented into small amounts across different addresses and networks, making it complex to trace the complete fund flow.

More critically, with OKX DEX processing over $200 million in daily trading volume, it creates a natural “noise” environment.

Hackers can mix illicit funds into legitimate transaction flows. The small transactions generated by the smart order-splitting algorithm blend together with normal user activity, reducing the risk of detection.

In addition, hackers may create multiple anonymous wallet addresses, input stolen funds in batches, process them through the smart order-splitting system, and output them to new addresses—creating a multi-layered “cleansing” effect.

Using this method, North Korean hackers might have split $100 million into hundreds of small orders (e.g., a few thousand dollars each), conducted multiple conversions from ETH to USDT and then to other tokens, and ultimately transferred the funds to clean addresses, making the activity appear like normal on-chain behavior.

3. What preventive or countermeasures does OKX have in place?

Everything on-chain leaves traces—it's just a matter of time before patterns emerge.

Therefore, what OKX can do is mainly focus on efficient monitoring and timely intervention.

When Bybit raised concerns about North Korean hackers possibly using OKX DEX for money laundering, Star, founder of OKX, responded directly: OKX DEX has deployed a real-time monitoring system capable of identifying and blocking transactions from blacklisted wallet addresses.

This is a crucial defense against known criminals abusing the platform.

For instance, if an address linked to known hackers or illegal activities attempts to trade via OKX DEX, the system automatically blocks the transaction.

As Star previously mentioned, after detecting inflows of illicit funds, OKX froze certain related assets and collaborated with the victim (Bybit) to track hacker addresses.

Such post-incident countermeasures demonstrate that OKX possesses a certain level of emergency response capability and can limit further loss expansion after an incident occurs.

The recent direct suspension of OKX DEX service was officially stated to be “in preparation for launching new security features,” including addressing “incomplete labeling issues on blockchain explorers.”

While specific details haven’t been disclosed yet, it’s reasonable to speculate that improvements will include more advanced on-chain analytics tools, enhanced collaboration with on-chain data providers, and clearer, more transparent transaction records to facilitate fund flow tracking.

By improving transaction labeling, OKX can assist regulators or security teams in more effectively identifying suspicious activities.

4. Where is OKX DEX headed in the future?

Firstly, I don't believe OKX DEX will remain shut down long-term—it should resume operations soon.

OKX has both the technical capability and strong motivation to resolve compliance issues.

Bear in mind, OKX has deep technological expertise in Web3. Most Web3 wallets seen in the market today actually rely on OKX’s underlying infrastructure: OKX OS (OKX Operating System).

OKX aims to become the “Google of the blockchain,” serving as foundational infrastructure for the entire Web3 industry—balancing compliance, technical service, and user experience.

Star recognized this early on and clearly stated at the 2049 event in 2024:

Wallets face mainly compliance challenges. In the future, there will be self-custody wallets offering easy-to-use, Web2-like experiences while still meeting regulatory requirements—for example, adopting ZK-KYC technology, where users’ KYC data isn’t exposed but can still be verified.

That day is approaching. The OKX Wallet is likely to undergo significant product evolution. Here are some expectations:

(1) The OKX Wallet will separate from the OKX Exchange, becoming an independent application, with completely isolated operating entities;

(2) The OKX Wallet may require KYC, either directly linked to OKX Exchange’s existing KYC or implemented via ZK-KYC technology;

(3) The OKX Wallet will further introduce native DeFi functionalities such as staking, lending, liquidity mining, and other decentralized services.

We can look forward to the next-generation form of the OKX Wallet.