Crypto Sweeper Bots Hacks and Scams You Need To Know

In this post, you will learn how hackers and scammers can use sweeper bots to hack or scam your hard-earned cryptocurrency assets.

Sweeper Bot Hacks Explained

Sweeper bots are automated scripts hackers use to monitor and intercept cryptocurrency transactions sent to compromised wallets.
Once a hacker gains access to a wallet's private key, they deploy a sweeper bot to continuously scan the blockchain for any incoming transactions to that wallet.
When the bot detects new funds, it immediately transfers them to the hacker's address, often faster than the legitimate owner or other bots can react.
Thus, the funds are effectively stolen before the original owner can secure them.

Sweeper Bot Hack Example

This is an example of how a sweeper box has been used to drain the victim's cryptocurrency wallet of any BNB that is transferred to it.

https://www.reddit.com/r/ethdev/comments/hugqhr/is_it_possible_to_remove_a_sweeper_bot_in_my/

Question: Can this user get rid of the sweeper box and recover the ownership of his wallet and assets?
The short answer is: VERY UNLIKELY

As described in this Metamaks article, 'What is a sweeper bot?':

'Sweeper scripts are a nuisance to dispose of once they have infiltrated your wallet, and require you to employ very complex methods or even recruit whitehat hackers. For example, there are highly specific approaches you can take if you are attempting to get NFTs out of a compromised wallet.'

In the same article, Metamask references another article called 'Operation: CryptoKitty Rescue,' which is very interesting and educative:
The CryptoKitty Rescue article shows how challenging it can be to reclaim ownership of assets from a wallet compromised by a sweeper bot.

Recovering assets from a cryptocurrency wallet compromised by a sweeper bot requires technical expertise and skills beyond the reach of most individuals.

As advised by Metamask:
'Keeping your secret recovery phrase secure is the best and most dependable way to avoid falling victim to sweeper scripts. Without it, malicious actors cannot access your private key and sign transactions that steal your funds.'

But, could not the victim remove the Sweeper Bot approval and solve the problem?

The sweeper bot can transfer assets because the hacker, having gained access to the wallet's private key, has set it up to authorize and execute transactions automatically.
This allows the bot to instantly transfer incoming funds from the victim's wallet to the hacker's wallet without further approval.

Question: So, revoking the malicious transaction would remove the authority given to the sweeper bot and solve the problem, right?

https://www.youtube.com/@cryptosafetyfirstwebsite

Answer: Unfortunately, no.
While revoking the approval would eliminate the sweeper bot's authorization to transfer funds, doing so requires paying a gas fee to process the revoked transaction on the blockchain, necessitating having some cryptocurrency.
However, any crypto sent to the compromised wallet to cover this fee is immediately drained by the sweeper bot, preventing the revocation.

What Can You Do To Prevent Sweeper Bot Hacks

To prevent sweeper bot hacks, follow these three practices:
1. Secure Your Private Keys: To prevent unauthorized access, ensure your private keys are stored securely offline or in hardware wallets.
2. Use Multi-Signature Wallets: Employ wallets that require multiple transaction approvals, adding an extra layer of security.
3. Regularly Revoke Unused Approvals: Periodically review and revoke unnecessary or outdated transaction approvals to minimize the risk of automated transfers by malicious bots.

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Sweeper Bot Scams Explained

Sweeper bot hacks require advanced technical knowledge and skills that not all hackers possess.
Therefore, a more straightforward approach might be to convince the victim to send funds to a compromised wallet, converting this complex hack into a more straightforward scam.

Sweeper Bot Scam Example

This example illustrates how scammers can deceive people into sending crypto to a compromised wallet.

https://www.reddit.com/r/CryptoScams/comments/1drza2s/locked_funds_scam/

In this scenario, the victim only lost a small amount of Ethereum, perhaps around 10 or 20 USD. However, this scheme can be highly profitable for the scammer.
Consider if 20 individuals fall victim to the scam and each transfers 10 USD. This can accumulate into a substantial sum of cryptocurrency for the scammer.

What Can You Do To Prevent Sweeper Bot Scams

Now that you know what a sweeper bot is, we are confident you will not send your hard-earned crypto to other people’s wallets.
There is no such thing as free crypto.
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