130 hack event(s)
Description of the event: It is reported that the FFF token deployed on the BSC has an abnormal additional issue event. This event is that the administrator of the original project party purchased the additional issue through the pre-set additional issue contract, and then sold the additional issued tokens and transferred the acquired assets in part. More than US $1.03 million of FFF tokens were sold in this issue.
Amount of loss: $ 1,030,000 Attack method: Abnormal issuance
Description of the event: Thoreum Finance was hacked. According to analysis, because the transfer function of the non-open source contract 0x79fe created by the Thoreum Finance project party is suspected to have a loophole, when the from and to addresses of the transfer function are the same, due to the use of temporary variables to store the balance, the balance will double when you transfer to yourself , the attacker repeated the operation many times, and finally made a profit of 2,000 BNB, involving an amount of about 580,000 US dollars.
Amount of loss: $ 580,000 Attack method: Contract Vulnerability
Description of the event: The OMNI Real Estate Token (ORT) project on BSC was attacked. The cause of the attack is suspected to be a loophole in the contract code. The attacker’s address is: 0x9BbD94506398a1459F0Cd3B2638512627390255e, one of the attack contracts is 0x0eFfECA3dBCBcda4d5e4515829b0d42181700606, the initial gas source of the attack is FixedFloat, and the attacker made more than 236 BNB, worth about $57.
Amount of loss: $ 70,705 Attack method: Contract Vulnerability
Description of the event: RoeFinance was attacked. The victim pool (0x574f) has just been emptied, with a total loss of about $80000. This is a typical price manipulation attack.
Amount of loss: $ 80,000 Attack method: Price Manipulation
Description of the event: The price of BRA token on BNB Chain is zero. According to the analysis, the token will be taxed during the transaction, and the tax collected will be directly sent to the transaction pair, and the tax will be added twice. Under this mechanism, after many such transactions, the number of tokens in the transaction pair continues to increase. At the same time, any user can call the skim function to retrieve the extra tokens in the transaction pair, which results in the actual number of tokens exceeding its issuance limit. This BRA token attack has caused 820 WBNB losses. The address of the attacker (0xE2Ba15be8C6Fb0d7C1F7bEA9106eb8232248FB8B).
Amount of loss: 820 WBNB Attack method: Abnormal over-issuance of tokens
Description of the event: Mycelium, a perpetual agreement, tweeted that due to the oracle feeding problem of the ETH-USD trading pair, MLP suffered a loss of 4~6% from robot arbitrage (the current pool size is about $6.6 million, and the estimated loss is about $300,000), but the team has fixed the loophole and resumed trading. The reason for this is that due to the fact that Binance began blocking US IPs in late December, one of Mycelium's three oracle data vendors went offline, and the other vendor also seemed to have gone wrong overnight, resulting in prices relying only on Coinbase and Bitfinex. Coinciding with about 4 pm yesterday, Bitfinex's ETH-USD feed price fluctuated significantly, and the spread was extremely large, perhaps the arbitrage robot detected the spread and began to arbitrage at a higher than usual amount, resulting in a loss of MLP.
Amount of loss: $ 300,000 Attack method: The oracle price problem
Description of the event: The NimbusPlatform project on the BSC chain was attacked, and the attacker made a profit of about 278 BNB. According to the analysis of SlowMist, the main reason for this attack is that the calculation of rewards only depends on the number of tokens in the pool, which leads to being manipulated by flash loans, thereby obtaining more rewards than expected.
Amount of loss: 278 BNB Attack method: Contract Vulnerability
Description of the event: Ankr's deployer key was suspected to be leaked, and hackers minted a total of 60 trillion aBNBc. According to MistTrack analysis, some funds have been cross-chained from BSC to ETH and Polygon. The hacker used Celer Network, PancakeSwap, Multichain, deBridge, 1inch, PancakeSwap, SushiSwap, ParaSwap in the process of transferring funds, and 900 BNB has been transferred to Tornadocash so far. The Ankr team stated, “Our aBNB tokens (the proof tokens for BNB pledges) have been stolen and we are currently working with exchanges to stop trading immediately. Currently all underlying assets on Ankr pledges are safe and all infrastructure Services will not be affected."
Amount of loss: $ 5,000,000 Attack method: Private key leak
Description of the event: After the attack on Ankr’s aBNBc token, an address exchanged 10 BNB for 15.5 million BUSD with the help of the Ankr vulnerability, resulting in the emptying of the Hay liquidity pool. Another user made a profit through the same method, with an income of about $3.5 million. Helio Protocol tweeted that the BNB pledged by users is safe, and the official is in close communication with the Ankr team to discuss the restart plan of aBNBc.
Amount of loss: $ 19,000,000 Attack method: The impact of the Ankr vulnerability
Description of the event: The SheepFarm project on the BNB chain was attacked by a vulnerability. After analysis, it was found that because the register function of the SheepFarm contract could be called multiple times, the attacker 0x2131c67ed7b6aa01b7aa308c71991ef5baedd049 used the register function multiple times to increase his own gems, and then used the upgradeVillage function to accumulate yield while consuming gems properties, and finally call the sellVillage method to convert yield to money before withdrawing money. The attack caused the project to lose about 262 BNB, about $72,000.
Amount of loss: 262 BNB Attack method: Contract vulnerabilities
Description of the event: The Ranger project on the BSC chain was an exit scam, and the Ranger token fell by 95%. The contract deployer sent the tokens to an external account, which was then sold for a profit of about $77,000. Do not confuse this project with similarly named tokens and symbols, refer to the contract address: bsc: 0xc9efd09c8170e5ce43219967a0564a9b610e5ea2.
Amount of loss: $ 77,000 Attack method: Rug Pull
Description of the event: Rug pull occurred in the DeFiAI project, and the contract deployer made a profit of about 40 million US dollars. According to SlowMist MistTrack analysis, funds have been transferred to Fixedfloat and MEXC.
Amount of loss: $ 40,000,000 Attack method: Rug Pull
Description of the event: The price of the Flare project has dropped by more than 95%, which is suspected to be a Rug Pull scam project. Flare token deployers and associated addresses received approximately 4 billion Flare tokens. The scam has so far made around $18.5 million.
Amount of loss: $ 18,500,000 Attack method: Rug Pull
Description of the event: The MooCakeCTX project suffered a flash loan attack, and the attackers made a profit of $143,921. According to Fairyproof’s analysis, the suspected reason is that the contract reinvested (the earn function was not called) before the user pledged (depositAll function) without settlement of the reward, that is, when the user pledged, the contract did not settle the previous reward and conduct new investment. This will cause users to get the previous pledge dividends immediately after the pledge. After the attacker borrows 50,000 cake tokens using a flash loan in the same block, he pledges it twice in a row, and then withdraws the pledged cake tokens and returns them to make a profit.
Amount of loss: $ 143,921 Attack method: Flash loan attack
Description of the event: The FITE (FTE) project is suspected of Rug pull, its website fit[.]app has been shut down, and social media has been deleted. Scammers have transferred 1900 BNB to Tornado Cash.
Amount of loss: 1900 BNB Attack method: Rug Pull
Description of the event: The UvTokenWallet Eco Staking mining pool contract was hacked. The key reason for the vulnerability is that the mining pool contract withdrawal function does not strictly judge the user input, so that the attacker can directly pass in the malicious contract address and use the malicious contract to empty the relevant funds. SlowMist MistTrack conducted a traceability analysis of the funds: so far, hackers have transferred a total of 5,011 BNB of profit to Tornado Cash. In addition, the source of the attack fee is also Tornado Cash.
Amount of loss: 5,011 BNB Attack method: Contract Vulnerability
Description of the event: The PLTD project was attacked by hackers, all BUSD in its trading pool was sold out, and the attackers gained a total of 24,497 BUSD. This attack mainly exploits the code loopholes in the PLTD contract, reduces the PLTD token balance in Cake-LP (0x4397c7) to 1 through a flash loan attack, and then uses the PLTD in hand to exchange all BUSD into the attack contract .
Amount of loss: 24,497 BUSD Attack method: Flash loan attack
Description of the event: The unopened contract 0xFaC064847aB0Bb7ac9F30a1397BebcEdD4879841 of the MTDAO project party was attacked by a flash loan, and the affected tokens were MT and ULM, with a total profit of 487,042.615 BUSD. The attacker used the functions 0xd672c6ce and 0x70d68294 in the unopened contract to call the sendtransfer function in the MT and ULM token contracts to profit (because they are both deployed by the project party, the unopened contract 0xFaC06484 has minter permission).
Amount of loss: 487,042.615 BUSD Attack method: Flash loan attack
Description of the event: The Micro Elements (TME) project is an exit scam, with a drop of more than 95%, and about $548,600 has been stolen. BSC address 0xd631464f596e2ff3b9fe67a0ae10f6b73637f71e.
Amount of loss: $ 548,600 Attack method: Rug Pull
Description of the event: Jumpnfinance project Rugpull, involving an amount of about 1.15 million US dollars. The attacker first calls the 0x6b1d9018() function of the 0xe156 contract to extract the user assets in the contract and store them at the attacker's address (0xd3de02b1af100217a4bc9b45d70ff2a5c1816982).
Amount of loss: $ 1,150,000 Attack method: Rug Pull