Topic: Private keys posted on Bitcointalk - page 3. (Read 1083 times)

My list is indeed not complete. I didn't search for Hex keys either, only WIF.

I didn't search for altcoin private keys.

That must be why the wallet grew to 2.2 GB. With just private keys, it was only a few MB.

I think that the number is bigger, since some have posted them as images which you could not "scan".

Even more, in some cases I remember there was a scam spree of posting "by mistake" ETH private keys for wallets containing tokens and no ETH. Obviously, at funding a smart contract was sending the ETH away.
So it was not only mistakes.


Impressive! I've intended a similar test some years ago with Electrum (my set was much smaller and I don't even remember if I've done my test with keys or just addresses). But for some addresses the number of transactions was too big and the Electrum servers were cutting me off (I knew less back then). So I've abandoned the idea of watching those. However, I've noticed even back then that even if some addresses were known to be leaked and unsafe, some people still were playing with them long afterwards (by funding with small amounts). But I was not aware of huge mistakes like that 0.84BTC... wow...

This post made me curious: how many private keys have been posted on Bitcointalk?
To find out, I searched all downloaded posts (which took hours) for anything that could be a Bitcoin private key. That resulted in 9375 potential keys (not all of them are valid, and no, I won't post the list).
Yesterday, I imported the private keys into a new Bitcoin Core wallet (this took only a few minutes), and did a rescan. This took forever, but was mesmerizing to watch: the balance went up and down by many Bitcoins, and this kept going for hours! I left it to finish overnight.
This morning, Bitcoin Core was hanging. I killed it, restarted it, and it took forever to load the wallet (which had grown to 2.2 GB during the rescan). Eventually, it worked! It's up to date, and the total balance is 0 (as expected). Every few minutes, Bitcoin Core is unresponsive for a few minutes, most likely because of the large wallet combined with a lack of processing power. It's not very nice to work with, and consumes 1 full CPU core.

Scrolling through the transactions, it's obvious any incoming transaction instantly gets sweeped, usually at a high fee. I assume many people have systems monitoring all compromised private keys, and they're competing against each other to steal the funds before someone else does. Back in the days, it happened to large amounts of Bitcoins, but the more recent transactions are mostly small. Except for last month (January 24): this address received 0.84362383BTC, which was instantly sweeped. The private key was posted 2 months earlier:
Someone made a very expensive mistake funding it. I'm hoping pbies can tell me where the private key comes from.

TL;DR
Don't post your private keys! Don't post your seed phrases! Don't try to be smart by creating a brain wallet!

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