GPU brute forcing an encrypted wallet

[Ronya]

How kind of you. I can not say hot excited i am, to find resolution. I hope it's just touching the right buttons and notw. Please reinstall windows.lol

[1715079977]

1715079977

[1715079977]

1715079977

[1715079977]

1715079977

[btchris]

No I surrender. Python wants not open. But i found out i can idle this.This is Monster about all wallets, but nothing where it wrotes there is your password.

For a butterflly i could toke a picture, maybe you understands why pyton do like me

I should have caught this sooner, but now I see the problem.

You have Python 3 installed. btcrecover only works with Python 2. (They are similar, but different programming languages.)

You can have them both installed at the same time, but it's probably safest to:

  1. Uninstall PyCrypto
  2. Uninstall Python 3
  3. Install Python 2.7.8 Windows X86-64 Installer from here.
  4. (optional) Install PyCrypto 2.6 for Python 2.7 64bit from here.

[MakeBelieve]

So if you know 4 words out of 8 characters is that possible to crack or not?

[btchris]

So if you know 4 words out of 8 characters is that possible to crack or not?

I'm not understanding you... can you describe in more detail? A bunch of examples would help.

It also depends on which wallet you're using.

[Ronya]

@btcchris
Big Thanks and Respect....12 hours to go....and i will not forget you, when i got lil bit more coins in my pocket, you get a lil thank you, a share

I just hope it find the pw

[btchris]

@btcchris
Big Thanks and Respect....12 hours to go....and i will not forget you, when i got lil bit more coins in my pocket, you get a lil thank you, a share

I just hope it find the pw

I hope so too. If not, but you remember something new about your password, we can always try again.

[Ronya]

Quick Questions in the cmd i understand everythings ETA 11 means 11 hours to go

But[###-----------------------] is written there at the momemt, should this my pw at the end, i am confused it was never so long

[Kipsy89]

Is it really possible to do this with brute force? I mean a ruby or python script won't do you any good, that's sure... they're interpreted languages. I guess it totally depends on the size of your key then.... A GPU could do this. But of course it is still futile for a real bitcoin private key! They're safe!

[Ronya]

Please do not discourage me 

[btchris]

Quick Questions in the cmd i understand everythings ETA 11 means 11 hours to go

But[###-----------------------] is written there at the momemt, should this my pw at the end, i am confused it was never so long

It should look something like this:

Code:

Read additional options from tokenlist file: --pause --no-dupchecks --wallet multibit.key
Counting passwords ...
Done
Using 4 worker threads
116668178 of 642544812 [#####--------------------------] 0:06:26, ETA:  0:29:01

In this example, it's been running for 6 minutes so far, and it has 29 minutes before it's tried every combination.

If it finds the password, it will look like this:

Code:

Read additional options from tokenlist file: --pause --no-dupchecks --wallet multibit.key
Counting passwords ...
Done
Using 4 worker threads
116668178 of 642544812 [#####--------------------------] 0:06:26, ETA:  0:29:01
Password found: 'Passwd'
Press Enter to exit ...

Or if it tries every combination and the password is something else (e.g. maybe it's longer, or has numbers), it will look like this:

Code:

Read additional options from tokenlist file: --pause --no-dupchecks --wallet multibit.key
Counting passwords ...
Done
Using 4 worker threads
642544812 of 642544812 [#######################] 0:35:27, Time: 0:35:27
Password search exhausted
Press Enter to exit ...

Does that answer your question?

[btchris]

Is it really possible to do this with brute force? I mean a ruby or python script won't do you any good, that's sure... they're interpreted languages. I guess it totally depends on the size of your key then.... A GPU could do this. But of course it is still futile for a real bitcoin private key! They're safe!

You're right, Bitcoin keys cannot be feasibly brute-forced.

But this thread is talking about brute-forcing the password on wallets. If the password is weak enough, or if you know enough about the password, it's certainly feasible (and a GPU can help, depending on the wallet).

As far as using a scripting language goes: yes they are slower, but many scripting languages implement the time-consuming portions (e.g. SHA) in native code, so using a scripting language isn't as big of a performance hit as you may think (btcrecover is written in Python, for example, but most of the crypto uses native code libraries (not written by me) or OpenCL for GPU acceleration).

Moral of the story is: use strong passwords.

[Ronya]

@btcchris

Absoutley it answers my question. 9 hours to go

[MakeBelieve]

@btcchris

Absoutley it answers my question. 9 hours to go

You must know the majority of the password do you? how many characters don't you know? 12 hours seems like a very short time to wait.

[Ronya]

I know it is a german word. And Maximun 5-6 Letters. No Numbers or+-*/ a german word

But I remember not a single Letter. My Style is that i start my word with Capital Letter. not perfume But Perfume

[CryptKeeper]

Use this service: http://www.walletrecoveryservices.com/

These guys are experts in wallet hacking and are reliable.

[Sonny]

Is it really possible to do this with brute force? I mean a ruby or python script won't do you any good, that's sure... they're interpreted languages. I guess it totally depends on the size of your key then.... A GPU could do this. But of course it is still futile for a real bitcoin private key! They're safe!

Brute-forcing a 256bit bitcoin private key is statistically impossible, but brute-forcing the password of an encrypted wallet is completely doable if there are only a few unknown characters in the password.

[MakeBelieve]

I've used: https://bitcointalk.org/index.php?topic=717334.0

Sorted out my problem in little to no time and was pretty cheap can't recommend him enough I found a post on reddit about his service and decided to ask him a few questions which he answered straight away and then contacted in through email which I found on the reddit post. Think it took no longer than 2 hours from sending him the details.

But there is also: http://www.walletrecoveryservices.com/

These are suppose to be good but take a bigger fee which wasn't worth it in my opinion.  I've heard great things though

Or of course you can try and use btcrecover but it seems these guys who offer the service do it much faster and have custom hardware and custom scripts.

[Ronya]

Half-time...six hours to got...I go to sleep...maybe a surprise when i wake up

Thanks again BTchris for patience,knowlegde and Help

[elliwilli]

You are kinda screwed...
the wallet is encrypted with multiple rounds of AES making it much, much harder to crack by almost any means.
Try getting a quantum computer 

[Welsh]

You are kinda screwed...
the wallet is encrypted with multiple rounds of AES making it much, much harder to crack by almost any means.
Try getting a quantum computer  

Wrong. It's indeed very possible to crack a password if you know a little about it. I've found around 8 passwords within a week. That is because they knew a little bit about their password. If you know the majority of your password you should be able to get it. If you are certain you used it but, might of made a typo(s) then it takes under a hour usually to find. The less you know about the password the more the chance of recovery failing.

Remember, we are not trying to crack a private key, but a password. It's much easier and is possible.


If anyone, needs help. Feel free to contact me about the matter.