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Crypto Hackers Steal $92M in April as Attacks Double from March

Crypto hackers made off with over $92 million in April 2025, more than double the $41 million lost in March 2025, marking one of the sharpest month-over-month increases in recent memory.

All of April’s incidents targeted decentralized finance (DeFi) platforms, underscoring growing risks in non-custodial protocols. The largest single breach occurred on UPCX, where attackers exploited a smart-contract vulnerability to drain over $70 million. A subsequent exploit on the KiloEx exchange netted $7.5 million but was notable because the hacker returned the funds within 48 hours, highlighting a rare case of “white-hat” intervention. Smaller flash-loan attacks and front-running exploits accounted for the remaining losses.

So far in 2025, attackers have siphoned off more than $1.7 billion in crypto assets—surpassing the $1.49 billion stolen across all of 2024. The acceleration is driven largely by the rise in cross-chain bridges and automated market maker protocols, which have seen critical infrastructure bugs emerge under increased transaction volumes.

Security experts warn that the sophistication of exploits is growing in step with DeFi’s complexity. Recommendations include adopting rigorous third-party audits, offering generous bug-bounty rewards, implementing multi-signature and timelock safeguards, and deploying real-time on-chain monitoring to detect unusual fund movements before losses escalate.

Platforms like Immunefi have become central to the defense ecosystem, running top-tier bounty programs and coordinating disclosure guidelines. Their data shows a steady uptick in submissions, signaling that protocols are increasingly turning to community-driven security checks to mitigate future attacks.

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Written by 365int

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