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Showing 11 of 11 results by marko10921
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Topic
Board Development & Technical Discussion
Merits 2 from 1 user
Topic OP
ELECTRUM bruteforcer Wanted! Immediate prize of 0.1 BTC + a lifetime chance
by
marko10921
on 20/11/2019, 04:18:53 UTC
⭐ Merited by Royse777 (2)
I am the initator of the following topic: https://bitcointalk.org/index.php?topic=5162837.msg51746952#msg51746952

So here's the deal, I am hiring a bruteforcer. To get hired you need to decrypt the following Electrum wallet:

https://pastebin.com/BFzstwTJ

The password, which I know, is between 5 to 9 chars (should be fairly easy, or not), I am not saying the exact length but it's between 5>9, the chars are 0..1, a..z, A..Z and probably one or two special ones similar to !@#$%^&.:

I am pretty sure the password is not part of any dictionaries, so don't even try to attack it by dictionary, bruteforce please!

As soon as you recover the password, message it to me in private and you are hired on spot. After I confirm I've found the cracker, I will ask you to post the btc address here and I will pay to it 0.1 btc immediatelly. But that's the least important part. The one to get hired will be given a new test of 10 BTC prize in private. And the final prize after that's done, is the last test for 100 btc.

Please rookies and noobs abtain from posting stupid ideas as in previous topic. You are not fooling anyone and just wasting your/my time. (I am only mentioning this because of guys like seoincorporation, everyone is welcomed to post as long as it is relevant to this topic).

If no one sends me the password by around 10 December 2019, I will post the password here in public anyway.

To get hired, just message me the password in private. It's that easy. Thank you!
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Topic
Board Development & Technical Discussion
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 20/11/2019, 03:39:41 UTC


If your goal is detect password and if u accept bruteforce method yes ; i can proof it.

Then why don't you post it here so everyone knows you are not just talking?
If he could do it he would've already done it and ran with the "Large amount of money" that is supposedly stored on the wallet.

alas, he can't do it.

Guys calm down, im waiting rockyou.txt

Edit : seed is already avaible in unencrpyted wallet, i mean no need to money transfer etc, its just password challange.

Edit2 : i tried opencl with 7 gpu bruteforce ; 1024 iteration sha512 decrypt not efficient even if opencl. Also password not in the rockyou.txt list.

I've made a random password similar to something like this: KdR.72.G@$.1eeFug.1@#s!
Just something random that you will never find in any password lists or anything, so don't even try to find it, you'll just lose your time, the whole point was to find someone capable of retrieving the password from the encrypted and decrypted file, not to bruteforce it cause it was pointless.

Again as outlined earlier by other bt members "known plaintext attacks" are not possible Sad

I have looked at the amount again and it's laughing at me back with an evil smile, and I can never access it. I guess it's the power of encryption and the universe.

I am thinking of bruteforcing it more and more, probably the length of the password is not that high, who knows, but I don't have the tools or computers required for the job, might be a dead end eventually.


LATER EDIT: THE PASSWORD TO THE PUZZLE WAS: AFS.ss4.19doEE1!wt1

One can easily verify, but since no one posted it or messaged it to me, I find this lead a dead end. I will go the bruteforce way
Post
Topic
Board Development & Technical Discussion
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 28/07/2019, 01:35:30 UTC
To this day no one replied to me with the password for the test encryption.

Apparently it is not possible to reverse a given encryption to it's known unecrypted state and find the password in the process.
Post
Topic
Board Development & Technical Discussion
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 11/07/2019, 06:09:46 UTC
However I'd like to try the bruteforce to a certain extent, at least to be content that I tried that option too.
Can anyone direct me to a bruteforce tool for electrum, preferably one that I can set up my own alphabet.

Check out https://github.com/gurnec/btcrecover I believe it has options you are looking for.

Thanks but it only works with Electrum 1.x and 2.x
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Topic
Board Development & Technical Discussion
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 11/07/2019, 04:20:04 UTC
I accept the situation.

However I'd like to try the bruteforce to a certain extent, at least to be content that I tried that option too.

Can anyone direct me to a bruteforce tool for electrum, preferably one that I can set up my own alphabet.

Or a dictionary one, where I can load a password list from text or csv.

If it's good I will tip in btc.

Thanks
Post
Topic
Board Development & Technical Discussion
Merits 2 from 1 user
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 10/07/2019, 03:18:55 UTC
⭐ Merited by LoyceV (2)

For example when an electrum wallet is crypted we got the following:

2 + 3 = X,                 we know that x is 5 cause we know the first 2 numbers, same with electrum when doing encryption:

unencrtyped_wallet + password_encryption = X,

------------------
but in this case we got something like this:

2 + X = 5,                 we can also find X because X = 5 - 2

same should be applicable to my situation:

unecrypted_wallet + X = encrypted_wallet


It would be more accurate to describe the decryption key (the password) as being on a 3-dimential plane. In your example, you can determine the solution to "X" however you do not know where on the "Z" plane the solution is, and there is an unlimited number of places on the Z axis the solution could be. Even having multiple plaintext sets will not help you.


I am going to speculate you are in a position that can be described as below:
You have an electrum wallet ("Wallet 1") that you do not have the password to
You have a second electrum wallet ("Wallet 2") that you know has the same password as Wallet 1
You have a decrypted copy of Wallet 2, possible from an old backup.
Wallet 1 has a lot of coin in it

Depending on how complex your password is, and how much you know about your password, you may be able to brute force the password via automated means. There are a number of software programs and service providers that can try to guess your password, and know if it figures it out.

For example, if you know your password is 10 digits, and is a combination of uppercase, lowercase letters and numbers that are something close to "random" there are a 8.39 * 1017 possibilities of what your password could be. However if you know your password starts with the uppercase letter "P" followed by 9 numbers that are something close to random, the number of possibilities drops to 1 * 108.


You are a smart guy, and the first to understand the situation presented.

1.
I have wallet1, where seed and xprv are both encrypted with strong password, I can see the balance and it's gianormous by anyone's standards. Wallet1 cannot be cracked by nothing, dictionary and bruteforce are out of the question. Possibly bruteforce, but length of password is unknown, and I'd like to be realistic and not go that route which will lead to alot of time wasted and eventual disapointment.
2.
I have wallet 2, unecrypted and encrypted, password for encryption unknown, but 99% chance to match the one at wallet1 as it was set up by the same entity. This in my mind was the best shot I had at getting the password for wallet1 as I supposed I could reverse the equation in some way unknown to me till I started this topic. Apparently this is categorized as an attack and a serious breach if it was possible, so right now I am pretty much content with the situation unless something else comes up. I am doing pretty well in life, I am heavily invested in BTC and also an early adopter, but the amount present in wallet1 is enough motivation for anyone to try and do something about it, no matter the cost.
Post
Topic
Board Development & Technical Discussion
Merits 2 from 1 user
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 10/07/2019, 03:07:36 UTC
⭐ Merited by LoyceV (2)
I already find the password, i will message it to you right now, feel free to send the BTC to the bitcoin addy i have in my profile. As proof i will leave the screenshot here:

You may have determined the encryption key, but that's not proof. I'm tempted to give you neg trust for that post.

you can duplicate his screenshot by using the seed phrase OP posted in first link:
Code:
purpose horse hundred around young explain aspect off almost where lawn number

the only way he could have found the password is if the password was something simple like 123 and he simply went through the common passwords to decrypt it!

That's correct, he duplicated the wallet by entering the seed in Electrum, which was already public, nothing secret about it...

He said that the password was "bitcoin" however anyone can test that "bitcoin" will NOT decrypt the password at the encrypted test wallet: https://pastebin.com/1nLV6n1P

Some random kid wasting time here.

The password to the test encryption contains a mix of 19 chars lower case letters / Upper case letters / numbers / and a few non alphanumeric chars. No reference to any word in any dictionary. The only way to crack it is via bruteforce in tens of years, OR if anyone finds a way to retrieve the password from the 2 wallets.
Post
Topic
Board Development & Technical Discussion
Merits 6 from 2 users
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 09/07/2019, 02:55:55 UTC
⭐ Merited by DarkStar_ (4) ,LoyceV (2)
This is not a common situation, it's like an equation where we know 2 variables and the 3rd is unknown.

I need to find password X by knowing the wallet in it's 2 states, both unecrypted and also encrypted with password X. On paper it sounds very do-able to me. We got 2 known parts of a 3 part equation.
That's not at all how AES works. It isn't just an equation. Sure it may sound like that would work, but AES is not some mathematical equation that you can perform such actions on.

What you are describing is called a Known Plaintext Attack. There are no known Known Plaintext Attacks on AES so what you are asking is currently impossible to do.

On paper it sounds very do-able to me
It is clear that you do not understand cryptography if this sounds doable to you. Because you don't understand cryptography, I would suggest that you don't make such assumptions as they are likely to be wrong.

Thanks alot! I tipped to your address.

Obviously I am a crypto noob, I never pretended that I know anything especially related to my request, it's the reason why I started this topic in the first place.

I just hoped that the way I presented it, like in an equation will make sense in cryptography too, it was a long shot but I had to try. Especially since alot of btc was involved Sad

I never knew this is called "Known-plaintext attack" I've looked into the wikipedia page and it makes alot of sense now.

I wish I could share with you my motives behind this, it was really alot of money involved.

Thanks anyway
Post
Topic
Board Development & Technical Discussion
Re: 0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 09/07/2019, 01:30:34 UTC
That simply is impossible since AES-256 (the encryption that Electrum uses) is a modern cipher which is resistant to known-plaintext attacks and it has been designed in a way to resist this type of attack specifically since in most use cases of it we already assume that the plaintext is known.

This is not a common situation, it's like an equation where we know 2 variables and the 3rd is unknown.

For example when an electrum wallet is crypted we got the following:

2 + 3 = X,                 we know that x is 5 cause we know the first 2 numbers, same with electrum when doing encryption:

unencrtyped_wallet + password_encryption = X,

------------------
but in this case we got something like this:

2 + X = 5,                 we can also find X because X = 5 - 2

same should be applicable to my situation:

unecrypted_wallet + X = encrypted_wallet


I need to find password X by knowing the wallet in it's 2 states, both unecrypted and also encrypted with password X. On paper it sounds very do-able to me. We got 2 known parts of a 3 part equation.

BOTTOM LINE

I am looking at a very large sum of money, if anyone can pass my test I will pay that 0.1 which is literally nothing, the most important aspect is that we will continue in private where I present the winner of the test to the real situation.

Let's just say I will pay easily 30 BTC or whatever the price of a Lambo Aventador is.
Post
Topic
Board Development & Technical Discussion
Merits 6 from 2 users
Topic OP
0.1 BTC prize - Find Electrum pass by knowing both unecrypted+encrypted wallet?
by
marko10921
on 08/07/2019, 03:02:54 UTC
⭐ Merited by DarkStar_ (4) ,LoyceV (2)
Hello guys,

I am looking for a cryptographer who can help me out with Electrum encryption. I have the following situation:

I know the wallet in Electrum unecrypted.
I also know the same wallet in Electrum but encrypted with unknown password.

So I know 2 variables already.

My question is this:

Can I determine the unknown password by knowing the Unecrypted wallet and also knowing the same wallet but Encrypted?


Known Unecrypted wallet = sha256(sha256("unknown_password")) = Known Encrypted wallet

I will offer a 0.1 prize to anyone who messages me the password from following test instance:

Unecrypted test wallet: https://pastebin.com/yemmF3Te
Encrypted test wallet: https://pastebin.com/1nLV6n1P

Message me the password to prove your skills and we will continue to the next stage which is private and on another level. I am looking at 8 figures ahead. Yes 8.

Thanks
Post
Topic
Board Altcoin Discussion
Re: Why is the price of bitcoin so high
by
marko10921
on 01/12/2017, 22:48:12 UTC
there's a 21M total supply of BTC, it will only go higher, wait for it Wink