6 hack event(s)
Description of the event: The profit farming agreement PolyYeld Finance was attacked. The project contract was used to mint 4.9 trillion YELD tokens and dump them in the secondary market. Currently, CoinGecko shows that the price of YELD has returned to zero.
Amount of loss: 4,900,000,000,000 YELD Attack method: Deflationary token compatibility issues
Description of the event: DeFi revenue aggregator PancakeBunny tweeted that its version on Polygon was attacked by outsiders and has suspended all Polygon Sushi Vaults. According to officials, Polygon vaults, BSC PancakeBunny vaults, and BUNNY are currently safe. The attacker made a profit of 1281 WETH.
Amount of loss: $ 2,402,462 Attack method: Flash loan attack
Description of the event: The polygon chain DeFi project helios runs off.
Amount of loss: $ 1,446,704 Attack method: Scam
Description of the event: The algorithmic stablecoin project SafeDollar on Polygon is suspected of being hacked, and an unconfirmed contract seems to have taken away 250,000 USD in USDC and USDT.
Amount of loss: $ 250,000 Attack method: Flash loan attack
Description of the event: The Polygon ecological project PolyDEX had a hacking incident. The hackers carried out a reentry attack on the Token Locker smart contract and stole about $500,000 worth of funds from the project.
Amount of loss: $ 500,000 Attack method: ERC777 Reentry Attack
Description of the event: Ankitt Gaur, founder and CEO of Layer 2 DeFi lending protocol EasyFi (EASY), said, “On April 19, team members reported that a large number of EASY tokens were transferred from the official EasyFi wallet to the Ethereum network and several unknowns on the Polygon network. Wallet. Someone may have attacked the management key or mnemonic. The hacker successfully obtained the administrator key and transferred $6 million of existing liquid funds in the form of USD/DAI/USDT from the protocol pool, and transferred 298 Ten thousand EASY tokens (approximately 30% of the total supply of EASY tokens, currently valued at 40.9 million U.S. dollars) were transferred to the wallet of the suspected hacker (0x83a2EB63B6Cc296529468Afa85DbDe4A469d8B37)."
Amount of loss: $ 46,900,000 Attack method: Private key preset