A major crypto security breach hit Superfortune this week, which confirmed that attackers stole funds through a leaked private key rather than an internal failure. The Manta-incubated project said no insider took part in the incident and dismissed claims of secret token sales. Instead, it confirmed that external attackers accessed a signer’s wallet and used it to approve a fraudulent transaction.
The project explained that its system initially passed the correct transaction during internal checks. However, attackers later used the compromised private key to submit a valid but modified signature. As a result, funds moved out of verified addresses into wallets controlled by the attacker. The incident triggered rapid market disruption and raised fresh concerns over private key security across crypto platforms.
Superfortune is an AI-powered prediction market application incubated by Manta Labs that blends Chinese metaphysics — specifically Bazi (Four Pillars of Destiny) and I Ching divination — with crypto market analytics. The project conducted its Token Generation Event on November 27, 2025 as the first Web3 project incubated by Manta Network. GUA, the project’s utility token, has a maximum supply of 1 billion tokens on BNB Smart Chain and is used for unlocking fortune reports, purchasing in-app charms, and rewarding ecosystem participation. Notably, 5% of GUA’s total supply is allocated to MANTA stakers as mining rewards, which is why this security incident reflects on Manta’s broader ecosystem and not just Superfortune itself.
Private key compromise confirmed
Superfortune’s official X update laid out a detailed timeline of the breach and addressed earlier confusion about address poisoning claims. The team said the incident occurred on May 27, 2026, during the execution of a multisig transaction intended to route unlocked team tokens directly into the public airdrop claim smart contract. The transaction was part of Superfortune’s scheduled token vesting and distribution pipeline — by February 2026, approximately 17.6% of the 1 billion total supply had unlocked, with the remaining ~82% still on the vesting schedule.
While initial theories suggested the team fell victim to a standard “address poisoning” attack (copying a lookalike address from historical logs), developers later declared that scenario highly unlikely. The hacker’s vanity address—engineered to perfectly match the first and last five characters of the real contract—had no historical footprint on the system.
Instead, internal logs revealed a more alarming vector: while the setup procedures initially passed verification checks with the correct address, a second, fully valid cryptographic signature was injected during final execution without leaving any corresponding records on the team’s physical hardware devices. This points toward an external compromise of the signing environment or API layer rather than an operational human error.
Manta Network’s co-founder publicly confirmed that the team is investigating the Superfortune security incident.
Additionally, on-chain data shows that attackers quickly sold the stolen GUA tokens within hours. They then bridged the assets to Ethereum and moved about 2,784 ETH into cold storage wallets. Around 170,121 USDT also flowed out through cross-chain bridges, confirming a fast and coordinated fund movement.
On-chain tracking and market impact
EmberCN analysts confirmed that attackers quickly sold nearly 14.98 million GUA tokens after the breach. As a result, the token price crashed by more than 75% within hours of execution. The $15 million total loss figure is based on on-chain calculations (roughly 14.98 million GUA dumped at pre-incident prices). The token has since shown a partial recovery from the immediate post-exploit lows but remains significantly down from its all-time high near $1.67 (reached in early 2026).
As of writing, according to CoinMarketCap, GUA was trading at $0.737238, up 19.50% in the last 24 hours. The stolen funds were later moved into several Ethereum wallets linked to the attacker’s network.
Moreover, investigators found repeated wallet patterns and so-called vanity “twin” addresses. These wallets shared similar starting and ending characters to trick verification checks. Hence, analysts now believe the operation followed a coordinated and preplanned strategy rather than a random exploit.
Growing threat of private key leaks
Chainalysis-style findings and broader industry reports show that private key leaks remain the main cause of crypto theft. Besides Superfortune, similar incidents have also hit Polymarket and several DeFi platforms. In most cases, attackers bypass systems by stealing access credentials instead of breaking smart contracts.
In addition, according to the findings by security firm SlowMist, there have been instances of numerous cases where funds have been stolen using compromised private keys. Despite this, the rate at which such instances are being recovered is still quite poor, despite advanced detection tools being implemented.
Furthermore, criminals today have gone as far as combining phishing, social engineering, and counterfeit hardware to obtain credentials. This means that today’s crypto exchanges are not only threatened by technical vulnerabilities but also human ones.
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