White-hat security researcher Florent, known by the handle 0xflorent, has successfully spearheaded the recovery of 1,003.62 ETH from a dormant HongCoin (HONG) smart contract that had been locked since 2016. In a coordinated effort with the original HongCoin development team, the operation unlocked assets valued at approximately $2 million for 48 initial investors. The recovery concludes a nine-year saga involving a failed Initial Coin Offering (ICO) and a critical code defect that had rendered the funds inaccessible.
The HongCoin ICO was introduced in 2016, commencing on August 29 and concluding on October 28 of that year. The project failed to meet its minimum fundraising goal, which should have triggered automatic refunds to participants. However, a bug within the smart contract’s refund mechanism prevented the release of the capital. This left the 1,003.62 ETH locked in the 0x9fa8fa61a10ff892e4ebceb7f4e0fc684c2ce0a9 contract address for approximately nine years.
The successful retrieval of such significant capital highlights the growing technical capabilities of the security community. Even as the Ethereum recovery outlook for many legacy projects remains uncertain due to lost keys or abandoned code, this case proves that some “bricked” assets can be salvaged through diligent auditing. For the 48 investors, the delay resulted in an accidental windfall as the value of their Ethereum grew substantially over the last decade.
Researcher identifies integer overflow in legacy Solidity code
The recovery became possible when Florent identified an integer overflow vulnerability within an administrator function of the HongCoin contract. This type of flaw was common in early Ethereum development, as the older version of the Solidity language used for the HONG contract lacked the overflow protection mechanisms found in later iterations. Without libraries like SafeMath, numerical values could “wrap around” when they exceeded their upper bit limit.
By carefully crafting a specific input and calling the team’s administrator function, Florent was able to reset a holder’s balance to 1. This action bypassed the flawed refund condition that had blocked the contract for nearly a decade. The researcher validated the entire process on a local Foundry fork of the Ethereum mainnet to ensure the safety of the funds before any live transactions were executed.
This level of caution is becoming the standard for complex on-chain recoveries. It mirrors the demand for higher security standards across the ecosystem, including the gaming and gambling sectors, as detailed in recent top crypto casinos ranking analysis. In those environments, transparent and audited smart contracts are now essential to prevent the kind of lockups seen with the 2016 HongCoin failure.
Collaborative execution of 41 on-chain transactions
The recovery was not a unilateral exploit but a coordinated effort between Florent and the HONG creators. After Florent shared his findings, the HongCoin team reviewed the recovery path and signed the necessary transactions. The entire process, from the initial contact between the researcher and the team to the final transaction signing, took approximately one week.
To fully unlock and distribute the trapped assets, the team executed 41 separate on-chain transactions. One specific refund transaction of 96 ETH was processed on May 29, 2026. By Sunday, May 31, the details of the recovery surfaced publicly, confirming that the 48 investors were finally eligible to receive their long-locked funds. This outcome stands in sharp contrast to more predatory incidents in the space.
While this event ended positively, the risk of technical failures remains a significant concern for the industry. For instance, THORChain recently warned users regarding fraudulent recovery schemes following a separate exploit. The HongCoin case serves as a rare example of a white-hat researcher and a development team working in tandem to correct an oversight from the earliest days of decentralized finance.
Legacy contracts and the future of lost Ethereum assets
The HongCoin recovery provides a blueprint for how security researchers might approach other dormant or “failed” contracts from the 2016-2018 ICO era. Thousands of legacy contracts remain published on the Ethereum blockchain, many of which hold significant value but suffer from similar early-stage coding errors. As tools for auditing and forking the mainnet improve, more “lost” treasuries may be recovered.
For the beneficiaries of this recovery, the “forced HODL” created by the contract bug has been highly profitable. In 2016, 1,003.62 ETH represented a much smaller investment; at [2026-06-02] valuations, those same tokens are worth roughly $2 million. This resolution removes one of the oldest “zombie” contracts from the network and provides a sense of closure for the original backers of the project.