In mid-2026, the crypto community encountered one of the most sophisticated cases of DeFi fraud. A developer known by the pseudonym Vlad successfully extracted more than $1.2 million from several tokens by combining locked liquidity with fee manipulation. The case became a textbook example of how formally following “security rules,” such as locking LP tokens, can still be used to deceive investors.
Specific Data: According to on-chain analysts, Vlad created at least seven tokens on BSC, or Binance Smart Chain, between January and March 2026. The projects attracted a total of $2.8 million, of which $1.2 million was withdrawn through a fee-farming mechanism despite the liquidity being “locked” for 365 days through Team Finance.
An investigation by blockchain analysts reconstructed the precise sequence of actions taken by the developer known as Vlad.
setTaxFeePercent function that allowed the owner to change the selling tax from 1% to 99%.setTaxFeePercent(99) function, increasing the selling tax to 99%.excludeFromFee list. He collected 47 BNB, worth approximately $14,100, in fees accumulated within the pool.
“This case demonstrates a fundamental problem: locking liquidity protects only against one specific attack vector, namely removeLiquidity, while leaving dozens of other methods available for extracting funds. It is like locking the front door while leaving every window open.” — ZachXBT, prominent blockchain investigator.
An analysis of the bytecode deployed by Vlad revealed the following critical functions:
| Function | Purpose | Risk |
|---|---|---|
setTaxFeePercent(uint256 taxFee) |
Allows the owner to change the selling tax within a range of 0%–99% | Critical: the owner can effectively block sales or extract all accumulated fees |
excludeFromFee(address account) |
Adds an address to the list of accounts exempt from fees | High: the developer can sell without paying fees while other users are charged 99% |
setFeeWallet(address wallet) |
Changes the address receiving collected fees | Critical: all accumulated fees can be redirected to the attacker’s wallet |
transferOwnership(address newOwner) |
Transfers ownership rights to another address | Medium: may be used to conceal the developer’s trail |
💡 Specific Takeaway: The SafeMoon 3.0 contract did not include a renounceOwnership function, allowing Vlad to retain full control of the token even after the liquidity had been locked.
Thanks to blockchain transparency, analysts were able to track Vlad’s transactions in detail.
Total Damage: $1.2 million withdrawn by the developer and $2.96 million lost by investors.
The analysis shows that investors could have identified the fraud before committing funds by paying attention to several specific warning signs.
The Vlad case led to several specific changes across the industry:
In the 1970s, one of the largest banks in the United States installed a state-of-the-art vault equipped with biometric scanning and a timer. The robbers did not attempt to break into the vault. Instead, they bribed an employee who had permission to change the timer settings. The vault remained intact and the lock functioned correctly, yet the money still disappeared.
The Vlad case is a direct digital equivalent of that story. The “vault,” represented by the liquidity lock, functioned correctly. The LP tokens were genuinely locked for 365 days. However, the “employee with access rights,” represented by the owner-only functions in the smart contract, allowed the developer to extract funds through a “back door,” namely fee farming. The case should serve as a lesson for the entire industry: security is not defined by isolated protective measures, but by a comprehensive system in which every component must be independently verified.
setTax, setFeeWallet, and excludeFromFee. Their presence should be treated as a red flag.renounceOwnership function has actually been called by reviewing the contract’s transaction history.The Vlad case demonstrated that formally complying with DeFi “security rules” without understanding their actual purpose creates a dangerous false sense of protection. A liquidity lock is a necessary but insufficient security measure. Investors should demand complete ownership renouncement or, at minimum, the transfer of administrative rights to a reputable multisig wallet protected by a timelock. Only a comprehensive approach of this kind can reduce the risk of similar incidents in the future.
“Security is not a box to check, but an ongoing process of verifying every component within a system. If you have not reviewed the code yourself, you have not invested—you have simply handed your money to a stranger.” — Andre Cronje, prominent DeFi developer.
