Hey, I need some help figuring this out. I found an old legacy wallet in my wallet.dat file, and I did encrypt it, but I think I can probably hash the password I set. I have a pretty solid guess on what it might be, but if anyone knows how to get around this, I’ll throw in a 10k reward. It's been ages since I dealt with this, and I was way sharper back then.
Here’s the wallet address I pulled from the .dat file for proof: https://www.blockchain.com/explorer/addresses/btc/1ApiCgLSysQFeF7V2MFTEHiRsep7AR8Pyx.
Bypass what exactly? if you encrypted a plain password and used that to encrypt your wallet, then you cannot just bypass that. Or you mean you want to brute force it?
But if you do know the password or have an idea , and you just want to know how can you try to open the file...I'm going to guess that you were using bitcoin core? Not sure if the latest versions still read the previous wallet.dat's but either way, you can try it. If that doesn't work, get the version released in 2013 (around the time you received funds) and try with that.
You can't just bypass encryption. I assume you're talking about wallet created by Bitcoin Core, so i would suggest you to consider BTCRecover[1] to perform brute-force if your password is relative weak or you remember characteristics of your password to reduce total possible combination.
P.S. People who PM you to offer help usually is a scammer, i would recommend you to ignore/report such PM.
[1] https://btcrecover.readthedocs.io/en/latest/
Do you remember anything about the password that was used? Length, special symbols, randomly generated or not, etc.
I successfully recovered an old wallet of mine using hashcat, but it does have a bit of a learning curve and needs a good GPU setup.
If you have the wallet.dat file, then use a script from the John The Ripper repo. Look for the file bitcoin2john.py.
https://github.com/openwall/john/blob/bleeding-jumbo/run/bitcoin2john.py
Generate the hash for hashcat by typing:
python bitcoin2john.py wallet.dat > myhash.txt
The output hash can be used to find the password using various techniques and the hash mode 11300.
More about Hashcat and different attacks check their webpage.
https://hashcat.net/wiki/
eg, brute force a 6 character password:
hashcat.exe --status -O -a3 -m11300 myhash.txt ?a?a?a?a?a?a
You need a GPU and a lot of luck and/or patience.
Did you have any luck recovering this?
If not, feel free to shoot me a PM - FYI I managed to recover a long-lost wallet password for another member just a few days ago (using my multi-GPU setup).
See: https://bitcointalk.org/index.php?topic=5228226.0
Have you tried any of the suggestions in the previous replies?
Or tried paid services from reputable services/members?
AFAIK, @flatfly above accepts the "hash" dump of your wallet.dat file so you can safely send it to him without risking losing your bitcoins.
There's already an example given above (via bitcoin2john.py).
For the "bypass" part, there's no way that it's possible since the password isn't stored anywhere.
Not in any server nor the wallet.dat file itself.
I wouldn't worry about a few hundred $ worth of alts when on the other hand there is currently almost $100k worth of BTC. The OP is clearly in no hurry considering it's been a long time since he asked for help without any results.
Were you able to extract the wallet hash as @Mushai explained here?
I can help you recover the password. If the password isnt extremely complex, theres a very good chance it can be recovered.
If you can send me the hash, Ill start working on it. Any hints about the password can help a lot, for example words, dates, names, repeating patterns, numbers, capital letters, special characters and how long you think it might be.
Dont worry, if you only share the hash, I wont have access to your wallet. The hash only allows password testing, nothing more. Anyone here can confirm that.
Once the password is found, we can verify it together through TeamViewer or something similar. You stay in full control the whole time, you open the wallet and create the transaction yourself, sending the BTC to another address of yours and a small part to me for my work. I will only type the recovered password to unlock the wallet, nothing else.
This way you dont have to pay anything in advance, you only pay if the password actually works and the wallet unlocks
It seems that the Op doesn't want a third party. He wants to handle it himself. This is because he has not said anything about your request of help since.
Maybe he would want both of you to be live, as suggested by a relatively new account above. But I wouldn't trust a new account for this deal.
Op, can you check for backups, your exported private keys might still exist somewhere.
Another is that you can used the password recovery tools suggested above, while trying them, you could become as smart as you were those old days.
Meanwhile, verify the integrity of the wallet.dat file. You could be trying to unlock the wrong wallet file.
If you actively follow up this thread, you might get a result.
About that, there's no risk if he just follow my suggestion to share the hash dump of his wallet file instead of the wallet.dat itself.
It doesn't contain the master private key, private keys or even public keys so it's safe for both safety and privacy of his bitcoins.
The "mkey" in the hash dump is useless without the encrypted private keys from the wallet.dat that it can decrypt.
I'm thinking that this is more of a case that OP wants a workaround to all of those bruteforce and related stuffs when he mentioned "bypass".
That, or the usual.
Ignore anyone who PMs you for help.
If the password is not complex, you can extract it with a tool and then use hashcat on a gpu farm to try to brute force it.
You will need a gpu farm though, maybe like something you can rent from Vast.ai.
Op is not actively following this thread. He only wrote once after the Op just to continue his complaint without following people's recommendations. I doubt he would even reply to pm if messaged by a random user.