I'm also wondering how did it happened. It's the fist time that I have heard of that kind of situation.
It's really risky to provide a private key in an airdrop but how did they manage to transact using your own wallet?
I think there are many projects similar to this what you have joined. There are fifty-fifty chance of airdrops now that are promising and giving real rewards. I hope there are ways to get rid of these scam projects and get blacklisted in thia forum and everywhere else ao that they cannot victim any other crypto enthusiast.
That's really weird this is the first time I read, that got your coins lost without giving anyone private key, and it's because of the smart contract and by participating in an airdrop you can lose your coins, then no one is safe now, because you can lose your coin without giving your private key, something is amiss here since, you may undergo a step where you enter your private key.
There must be something that you have done that allowed them to take control of your eth address. Maybe one of those small stuffs that you need to do in order to receive airdrops. We can never really know unless there is more information.
Is it the only the tokens you received from that airdrop that got withdrawn or you also lost your other coins on you erc20 wallet, if it only the airdrop token that got withdrawn then it from them and they might have made a cash back operation from the transaction since you have not spent the token.
From my experience with Airdrop, I just want to add a little. Learn first carefully the airdrop itself like the clarity of the project, the team, the dev, the website, the smart contract and the equally important whitepaper. If you feel there are irregularities in one of the social media such as Facebook or Twitter that was just created and the display that is not convincing means that it is airdrop that is made impromptu just to steal airdrop participant data.
i know that the project is scam and i didnt invest in it i just paticipated in the airdrop, my question is how did they manage to make a transcation from my wallet even though im pretty sure that i didnt submit my private key.
p.s: its the only token that went out my wallet