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Showing 9 of 9 results by oliver_g
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Topic
Board Altcoin Discussion
Re: Binance smart chain and 0 dollars transactions attack
by
oliver_g
on 08/12/2022, 17:59:01 UTC
It is now very clearly visible that binance is involved in this is scam according, how they behave.

Quote from binance smart chain support:
Quote
Hello,

After reviewing the case, we have concluded that this was not due to a vulnerability in BSC.

1. The 0 transfer from your address 0xb410e3d622D1072eE3E1cc6cdc90120E657977F7 to scammer’s address 0x27feaafd9b46b74bee510a0a538615d2ff639871 was not a withdrawal but a call to the token contract’s https://bscscan.com/token/0xe9e7cea3dedca5984780bafc599bd69add087d56#writeContract transferFrom function. The transferFrom function does not require the private key of the sender address if the amount is 0.  Anyone can call transferFrom with any address + 0 amount in token contract.

       Note that this function is not specific to BEP20 but to ERC20 tokens as well. If you check this contract from Etherscan (and other token contracts) https://etherscan.io/token/0xdac17f958d2ee523a2206206994597c13d831ec7#writeContract, you will be able to find and call the same transferFrom function.

2. What the scammer has managed to achieve was to use the function to his advantage and target users who would copy the scam address from the previous transactions, trick them into thinking that it was a legit address and make a deposit to it.


We have raised this to our security team to check the possibility of tracking this scammer.
We are also thinking of possible solutions on how we can help users from falling victim.

Quote
Hi, I understand your frustration. I am actually aware of this case, this is not a vulnerability issue, and it is not an issue with Binance Smart Chain itself. It is the way ERC20 was designed, so it is happening on Ethereum and other EVM compatible blockchains as well. I honestly don't think there is anything we can do about it, it is just like a phishing attack on web2, not a vulnerability with the internet but more like a scammer attack on an open network. I would recommend next time making a transfer, specially a large transfer to verify the destination wallet address.
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Topic
Board Altcoin Discussion
Re: Someone sent ERC20 from my cold storage
by
oliver_g
on 08/12/2022, 04:41:59 UTC
I lost by this vulnerability 100000 dollars.
https://bitcointalk.org/index.php?topic=5425022.0
Post
Topic
Board Scam Accusations
Re: I got scammed out of 100000 dollars by fake 0 dollars withdrawal on BSC
by
oliver_g
on 08/12/2022, 04:35:27 UTC
Situation update. I reporded about this scam first time to binance 29:th or 30:th november.

Here is answer:
Quote
After reviewing the case, we have concluded that this was not due to a vulnerability in BSC.

The 0 transfer from your address 0xb410e3d622D1072eE3E1cc6cdc90120E657977F7 to scammer’s address 0x27feaafd9b46b74bee510a0a538615d2ff639871 was not a withdrawal but a call to the token contract’s https://bscscan.com/token/0xe9e7cea3dedca5984780bafc599bd69add087d56#writeContract transferFrom function. The transferFrom function does not require the private key of the sender address if the amount is 0. Anyone can call transferFrom with any address + 0 amount in token contract.

Note that this function is not specific to BEP20 but to ERC20 tokens as well. If you check this contract from Etherscan (and other token contracts) https://etherscan.io/token/0xdac17f958d2ee523a2206206994597c13d831ec7#writeContract, you will be able to find and call the same transferFrom function.

2. What the scammer has managed to achieve was to use the function to his advantage and target users who would copy the scam address from the previous transactions, trick them into thinking that it was a legit address and make a deposit to it.
Here is article about this scam:
https://mirror.xyz/x-explore.eth/cL3d_CyNujXq8XY7ueP4omNXx_IY1EG5Dz0FD0vJ90M
And here updated info:
https://dune.com/opang/first-and-last-address-construction
Scam continues and new victims loss money. Now passed 8 days since i reported about this vulnerability and binance even did not inform when it will fix this vulnerability.
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Topic
Board Altcoin Discussion
Re: ON-CHAIN ADDRESS POISONING ATTACK Newest Type of Scam
by
oliver_g
on 06/12/2022, 17:21:17 UTC
I got scammed out of 100000 dollars by this vulnerability.
https://bitcointalk.org/index.php?topic=5425022.0
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Topic
Board Altcoin Discussion
Re: Binance smart chain and 0 dollars transactions attack
by
oliver_g
on 02/12/2022, 18:41:44 UTC
I made a transaction today from my Trustwallet to my MEXC Account of around 300$, after the transaction occurs, at the same time 0 USDT has been transferred from my Trust wallet
Can you give link to your transaction on bscscan?
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Topic
Board Altcoin Discussion
Re: Binance smart chain and 0 dollars transactions attack
by
oliver_g
on 02/12/2022, 10:21:04 UTC
I lost by this vulnerability 100000 dollars.
https://bitcointalk.org/index.php?topic=5425022.0
Post
Topic
Board Scam Accusations
Re: I got scammed out of 100000 dollars by fake 0 dollars withdrawal on BSC
by
oliver_g
on 01/12/2022, 15:26:43 UTC
Not trying to blame you there, just trying to understand how this could work
I copied address from last withdrawal from bscscan.
You can see it here:
https://bscscan.com/address/0xb410e3d622d1072ee3e1cc6cdc90120e657977f7#tokentxns

Can some make topic about this vulnerability in reddit? I cannot make new topics there.
Post
Topic
Board Scam Accusations
Re: I got scammed out of 100000 dollars by fake 0 dollars withdrawal on BSC
by
oliver_g
on 01/12/2022, 15:06:01 UTC
Link to you "research" / vulnerability description / etc?

It sounds like you are talking about a smart contract, not a blockchain issue.
https://ethereum.stackexchange.com/questions/140214/fake-0-token-transaction-on-bsc
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Topic
Board Scam Accusations
Merits 1 from 1 user
Topic OP
I got scammed out of 100000 dollars by fake 0 dollars withdrawal on BSC
by
oliver_g
on 01/12/2022, 14:47:41 UTC
⭐ Merited by hosseinimr93 (1)
First i deposited 50000 and 8684 dollars to binance. Then scammer made 0 dollars withdrawal from my address without having my private keys. Address where this empty withdrawal happened to is similar to binance's deposit address. Last 5 symbols are same and 2 first also are same. Then i copied address of last withdrawal, confirmed that last 4 symbols are same and deposited 100000 dollars. I did not notice that other symbols of address are different.

I started to research about it in internet and figured out that scammer do not have my private keys and did withdrawal from my address using vulnerability in binance smart chain blockchain. I.e. scammers can make empty withdrawals without private keys to addresses with at least 5 same last symbols and 2-4 first symbols as exchanges' deposit addresses. Some people do not compare every symbol of address and watch for example only last 4 symbols and can send funds to scammer's address.