North Korea’s Lazarus Hackers Try to Exfiltrate Harmony Funds

The notorious cybercrime group used Ethereum-based Railgun to anonymize their movements, but exchanges froze some assets

article-image

Source: Shutterstock / BeeBright, modified by Blockworks

share

North Korean hacker group Lazarus made attempts to move funds worth $63 million that were stolen from last year’s Harmony bridge hack, but the crypto exchanges used for the process claim its transfers have been blocked.

Blockchain sleuth ZachXBT shared on Twitter that the group moved some 41,000 ETH over the weekend using Ethereum-based Railgun, a smart contract that keeps user identities private, to exchanges Binance, OKX and Huobi. The transactions were carried out between Jan. 13 and 14.

ZachXBT also shared over 350 addresses associated with the hacker group. 

Binance CEO Changpeng Zhao tweeted that the exchange has previously detected the hacker’s fund movement, and that it coordinated with Huobi in freezing the accounts. They also together managed to recover 124 bitcoin ($2.6 million), according to Zhao, implying that some of the stolen ether was swapped for bitcoin.

Huobi too was able to detect and prevent the hacker from attempting to launder funds, according to Justin Sun. About Capital, Sun’s investment firm, acquired Huobi in October

Harmony’s Horizon bridge was one of the biggest hacks of last year. It allows users to move their cryptoassets via cross-chain transfers between Ethereum, Binance Smart Chain and Harmony blockchains. The bridge was exploited in June 2022 for $100 million, with the proceeds initially moved via now-OFAC-sanctioned Tornado Cash

Blockchain analytics firm Elliptic said that different types of cryptoassets were stolen including ETH, BNB, USDT, USDC and Dai. After the theft, the hacker used different types of decentralized exchanges to swap the tokens for ETH, which is a “common technique utilized by DeFi hackers,” the firm added. 

The total amount of funds lost to hacks in 2022 amounted to $4.3 billion of cryptocurrency, representing a 37% jump from 2021. Smart contract vulnerabilities that lead to malicious exploits remain among the most pressing threats that need to be solved in 2023.


Get the news in your inbox. Explore Blockworks newsletters:

Tags

Decoding crypto and the markets. Daily, with Byron Gilliam.

Upcoming Events

Old Billingsgate

Mon - Wed, October 13 - 15, 2025

Blockworks’ Digital Asset Summit (DAS) will feature conversations between the builders, allocators, and legislators who will shape the trajectory of the digital asset ecosystem in the US and abroad.

recent research

Research Report Templates (2).png

Research

We’re bullish on the PUMP token. We believe Pump.fun's brand strength, existing integrations, product roadmap, and strategic levers justify PUMP's TGE valuation, and expect the token to re-rate meaningfully higher in the months ahead.

article-image

Securitize CEO Carlos Domingo says institutions are eager to get exposure to tokenization

article-image

Trade isn’t war and prosperity isn’t a contest

article-image

Data shows frontrunning has declined on the network compared to last year

article-image

Industry watchers weigh in on what’s coming for bitcoin, M&A and tokenization before the year wraps

article-image

“We are open 24/7/365, but good luck getting an employee to pick up.”

article-image

BitVM3’s “garbled circuit” approach faces critical security and scaling research before it will be practical