Attacker controls 60% of aPriori airdrop using 14,000 fake wallets in coordinated Sybil attack

A single attacker controlled more than 60% of the aPriori airdrop by deploying over 14,000 connected wallets in a coordinated Sybil attack, according to blockchain analytics firm Bubblemaps. The exploit targeted the October 23 distribution on BNB Chain, which allocated 12% of the project’s total APR token supply ahead of its planned Monad mainnet launch.

Bubblemaps’ investigation revealed that these wallets were freshly funded via Binance, each receiving exactly 0.001 BNB for gas fees, created in tight time windows, and used to funnel APR tokens to secondary addresses. The pattern strongly indicates a Sybil attack, where a single entity creates numerous wallets to game a token distribution system.

“The data visualization of APR token distribution shows a dense network of interconnected wallets,” Bubblemaps stated, “which suggests deliberate coordination rather than typical user participation.”

Mechanics of the exploit

The aPriori airdrop gave participants three weeks to claim tokens, offering either a smaller immediate share or a larger allocation upon the mainnet launch.

However, the attacker appears to have bypassed fair distribution by automating wallet creation and claims. The APR tokens were then funneled to new addresses, forming a secondary layer of linked wallets, obscuring ownership and centralizing the majority of the tokens in a single entity’s control.

As of November 11, Bubblemaps reported that the entity continued funding new wallets to claim more tokens. The analytics firm has reached out to the aPriori team for comment but has received no response. Bubblemaps has now opened an investigative case on its Intel Desk, allowing the crypto community to vote using BMT tokens to prioritize the issue for further analysis.

Broader trend of Sybil attacks

Sybil attacks have increasingly plagued crypto airdrops. The aPriori incident follows similar coordinated exploits in recent months. For instance, MYX Finance’s airdrop saw roughly 100 freshly funded wallets claim about 9.8 million MYX tokens—valued at approximately $170 million—via allegedly coordinated activity. The wallets were funded via OKX and claimed tokens almost simultaneously.

Similarly, Avantis’ airdrop experienced a smaller-scale Sybil attack, where over 300 addresses claimed rewards before pooling tokens to major exchanges, with the exploit estimated at around $4 million. Bubblemaps emphasizes that while projects may implement anti-Sybil protections, these exploits reveal persistent vulnerabilities in token distribution mechanics.

“Patterns strongly suggest coordinated manipulation,” Bubblemaps said regarding prior events. “The same mechanisms appear to have been deployed in the aPriori airdrop.”

Implications for crypto projects

The aPriori airdrop exploit underscores the ongoing challenges of fair token distribution in decentralized ecosystems. A single actor controlling over 60% of an airdrop can distort project economics, undermine community trust, and highlight the importance of robust anti-Sybil measures.

As the community and analytics firms investigate, the incident serves as a warning to other projects preparing token distributions. Without stronger verification systems and monitoring of wallet activity, similar exploits are likely to recur, jeopardizing equitable access to early-stage crypto tokens.