Unibot contract $560K exploit crashes token price by more than 40%


A new contract deployed on Oct. 29 by Unibot, a popular Telegram bot used to snipe trades on the decentralized exchange Uniswap, was reportedly exploited for roughly $560,000 in various memecoins from users.

On Oct. 31, blockchain security firm Scopescan alerted Unibot users about an ongoing hack on Unibot that went undetected. An exploit on a newly deployed contract by Unibot drained the crypto holdings of several users.

Unibot later confirmed the hack by revealing initial details:

“We experienced a token approval exploit from our new router and have paused our router to contain the issue.”

Amid ongoing investigations from Unibot and blockchain investigators, Scopescan advised users to revoke the approvals for the exploited contract (0x126c9FbaB3A2FCA24eDfd17322E71a5e36E91865) and move the funds to a new wallet.

Unibot hacker moving funds. Source: 0xscope.com

The hacker is in the process of converting the stolen memecoins into Ether (ETH), blockchain data from Scopescan shows.

Unibot 1-day price chart showing a sharp decline in price following the hack. Source: CoinGecko

As seen above, the market reacted negatively to the development as the UNIBOT token witnessed an immediate 42.7% drop in its price in one hour — from $57.56 to $32.94. However, the token’s price is making a recovery attempt at the time of writing.

Unibot committed to compensating all users who lost funds due to the contract exploit. Weekly transaction data shows that cryptocurrencies such as Joe (JOE), UNIBOT and BeerusCat (BCAT) represented a major part of the loot.

Cointelegraph also learned from Scopescan that the address 0x835B, which is identical to the exploited address, was deployed and is being used to receive tokens from unsuspecting victims.

Unibot has not yet responded to Cointelegraph’s request for comment.

Related: Telegram crypto bots gain momentum in the market: Binance Research

A similar contract exploit recently drained 280 ETH from users of Maestrobots, a group of cryptocurrency bots on the Telegram Messenger app.

In the following days, Maestrobots paid a total of 610 ETH from its own revenue to cover all the user losses while citing a lack of liquidity to buy back the lost tokens:

“So we compensated affected users with the ETH equivalent of their tokens, and boosted that amount by 20% because you deserve it. These refunds cost 334 ETH.”

Blockchain security firm CertiK confirmed to Cointelegraph that it has been able to detect the transactions showing the 334 ETH compensation paid out to users from Maestro.

Magazine: Ethereum restaking: Blockchain innovation or dangerous house of cards?

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