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Home Cryptocurrency

Ankr Confirms Multi-Million Dollar Hack

Ibhadojemu Emmanuel by Ibhadojemu Emmanuel
December 2, 2022
in Cryptocurrency, Security
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Ankr, a BNB Chain-based decentralized finance (DeFi) protocol, confirmed a multi-million dollar hack on its platform on December 1st. The hack seems to have been first discovered by on-chain security analyst PeckShield at about 12:35 am UTC on December 2nd. 

Ankr has confirmed via tweet that the aBNB token was exploited and that it is working with exchanges to immediately stop the trade of the token which has been compromised. 

Our aBNB token has been exploited, and we are currently working with exchanges to immediately halt trading.

— Ankr (@ankr) December 2, 2022

The hacker was allegedly able to mint 20 trillion Ankr Reward Bearing Staked BNB (aBNBc), which is a reward-bearing token for BNB staked on the protocol. 

The hacker used services such as Uniswap, Tornado Cash, and different bridges to swap and hide the funds in order to gain about $5 million worth of USD Coin, according to a tweet from on-chain analysis firm Lookonchain. In another post, it added that “all underlying assets on Ankr Staking are safe at this time, and all infrastructure services are unaffected.”

Seems that @ankr got hacked an hour ago!

The exploiter minted 20T aBNBc and dumped it on #PancakeSwap.

At present, the exploiter have successfully exchanged more than 5 million $USDC.https://t.co/hF1tgNYw0t pic.twitter.com/XIPjBi6wvs

— Lookonchain (@lookonchain) December 2, 2022

Blockchain security firm Beosin suggested that the hack was a result of the vulnerabilities in the smart contract code combined with compromised private keys, which may have appeared from a technical upgrade from Ankr’s team about 12 hours before the incident. It also noted that this mass minting pushed the price of aBNBc to fall 99.5% from $303.89 to $1.53 in a matter of hours, according to data from CoinMarketCap. “It is possible that the deployer’s private key was exposed in this upgrade, leading to an attacker using deployer privileges to modify the contract,” a Beosin spokesperson said.

@ankr has been exploited. $aBNBc has dropped -99.5%.
The hacker minted tons of $aBNBc and made a profit of 5,500 BNB (~$1.6 million)
The deployer changed the implementation contract to the vulnerable contract address before the attack (possibly due to private key compromise). pic.twitter.com/GJheXh0oDp

— Beosin Alert (@BeosinAlert) December 2, 2022

The BNB Chain Twitter page also stated that the exploiter’s wallet address has been blacklisted.

We are aware of the attack on @ankr's aBNBc that happened earlier today, leading to a substantial amount of new aBNBc being minted. The exploiter has been blacklisted.
Our community is on top of it, coordinating a response. We will provide more updates as they become available.

— BNB Chain (@BNBCHAIN) December 2, 2022

In another tweet posted today, the world’s biggest cryptocurrency exchange Binance confirmed that its team is in talks with relevant bodies to investigate the occurrence. It also added that Binance users’ funds are safe.

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Ibhadojemu Emmanuel

Ibhadojemu Emmanuel

Ibhadojemu Lucky Emmanuel is a graduate of Education and Economics from the University of Benin. He has a passion for tech and business and has been writing professionally for over a period of five years. He's written across various topics and segments and knew tech-business was it when he first stumbled on it. He has a great passion for music and arts, and wants to visit as many countries as he can someday.

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