Bitcoin Core, Blockchain.com - Cloud Multi-GPU Accelerated Wallet Recovery. BTCRecover with Vast.ai

[@Graphy3D]

Great video! It's extremely useful! I'm trying to recover a BIP39 seed phrase as quickly as possible (when I only know the first 5/12 words words), and have a few questions: 1) Isn't there a secure way to execute the seedrecovery software on Vast, yet? One and a half years passed since the moment you released this video, I'm wondering if security improved a bit 2) Instead of using one computer, if you use 2 identical computers on Vast with "--worker 1/2" and "--worker 2/2" in the command when recovering a seed phrase, don't you double your performances? I'm asking that because you said that recovering BIP39 seeds on Vast doesn't give a huge performance boost 3) Let's imagine you tried a lot of different combinations of words, but you forgot to add a word to your tokenlist. Can you skip all the attempts you already made, in order to save time? Thanks in advance 😃

[@CryptoGuide]

Firstly, you are missing too many words to recover... The practical max missing words is 3, maybe 4 if it's a high value wallet. ($100k+) The security isn't something that can be fixed. It will never be safe to have both the seed and passphrase on rented or online systems. Performance can increase with multiple workers, but you will hit a performance ceiling pretty quickly.

[@Graphy3D]

@@CryptoGuide My tokenlist is much smaller than the standard BIP39 list. Mine only contains 48 words. Is that practical enough? Though, after testing all the possible sequences of words in my tokenlist, I may find out there are one or two additional words i missed. This is why I asked the third question. What's the performance ceiling you mentioned? Can't you split the workload simply adding more workers before running the command? I was planning to rent about 10 GPUs on Vast

[@CryptoGuide]

With 48 possible words it would take 2-3 months on something like an m1 mac mini or modern i7, so whether that is worthwhile depends on your wallet. There is currently no ability to create an exclusion list. For seed recovery, you will bottleneck very quickly such that adding more than 1-2 GPUs won't help.

[@Graphy3D]

@@CryptoGuide My plan is to rent 5 machines with two RTX 3090s each. If my calculations are correct it shouldn't take more than 3 days

[@CryptoGuide]

Nope... You will hit a ceiling at the seed generation step based on single core CPU performance after adding a couple of GPUs. (And maybe earlier depending on the single core performance of the system you rent) There isn't really any way for this not to take months unless you do something code something custom in pure OpenCL that can run across multiple servers. (And at the end of the day, a few months isn't actually too bad as far as recoveries go)

[@stayshow]

Thank you so much for these videos. I have a question about the nature of the parallel computing using btcrecover. I'm assuming that each instance you start on vast.ai has a different starting point correct? In other words, each instance of btcrecover randomly starts to put the characters together from the tokenlist file. In other words, the 4 instances don't start from the same place and go through all the combinations in the same order?

[@CryptoGuide]

BTCRecover is totally deterministic, in this example, it is the --worker command which makes the different instances look at different passwords, rather than all simply checking the same ones.

[@stayshow]

@@CryptoGuide Thank you for the answer. It helped me out considerably. Is there an easy formula I can use to calculate how many possible passwords I could create from, say, 20 characters? If the characters can be upper or lower case, or numbers or special characters? Or a combination of those? I've looked everywhere online and I cant find anything.

[@CryptoGuide]

.

[@michaeljokel8326]

What do you suggest on a brute force method? Also is the multigpu instance auto set? so nvidia-smi shows the process?

[@CryptoGuide]

What are you trying to achieve? (Which wallet and do you already have some idea of the password?) The main thing you need to increase with these Multi-GPU devices is thread count. (So generally, 2 threads per GPU works well)

[@benjaminmiles5062]

Hello buddy, thanks for the video. Very clear and I have managed to get it going. Just a quick question if you could be so kind to answer, is it about right that the speed for my BTC dat wallet using my AMD cards which are 6 x rx580 8gb cards on my own rig hashing at 3.12 KP/s right? as it seems very slow with 6 cards running or am I going wrong somewhere? I am using andrenaline 20.2.2 drivers. Have tried in compute mode also but no difference. Would flashing the bios on cards be better with blockchain drivers do you know? I have also doubled up on your settings for global and local-ws which has speeded it up. Thanks again.

[@CryptoGuide]

Those are old cards now, so it doesn't sound particularly slow if you compare to the performance I list here btcrecover.readthedocs.io/en/latest/Usage_Examples/2020-10-06_Multi-GPU_with_vastai/Example_Multi-GPU_with_vastai/ I would suggest that you might also have more success with two instances of BTCRecover and using the worker command, even on the same machine. The JTR implementation hasn't really been optimised for more than 2 GPUS so will start to lose performance after about 3...

[@benjaminmiles5062]

@@CryptoGuide Thank you for the advice

[@CryptoGuide]

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[@황인성-z2c]

What are wildcards and rock you list? tokens auto Are you talking about text?

[@CryptoGuide]

Please read the documentation... btcrecover.readthedocs.io/en/latest/tokenlist_file/#expanding-wildcards Rockyou: github.com/brannondorsey/naive-hashcat/releases/

[@konreww]

Hey. Is it better to run with enable open cl? What’s the difference with or without?

[@CryptoGuide]

Depends on the type of recovery, but there are some where it can make a significant improvement.

[@purban1367]

Hello Sir, Thanks for the video. Is it possible to take into count the already processed password combinations in autosave files when starting a new instance later on? Thank you!

[@CryptoGuide]

You can move the autosave file from one PC to another, but unless you use the --worker command from the start to devide up the work it won't work correctly. (Though you can also run the checks sequentially on one PC, worker 1, then 2, etc)

[@meowmeowvibesonly966]

It seems that the setting method is different from bitcoin daytrader. what's the reason?

[@CryptoGuide]

He is using an old fork of BTCRecover that hasn't been updated since late 2017. (And doesn't support things like OpenCL acceleration for Blockchain.com wallets, etc)

[@beeper2549]

Hi, I have some problem, im missing 3 words from my metamask seedphrase (12 words in total). I have run seedrecovery on my laptop and it took nearly 10hours to go through 1.4 billiards of seed phrases, with nearly ~40kp/s. Can you please say how long it will take if I order server with 3080 for example? If I understand correctly, there ~8 billiards of possible combinations I need to go through. Many thanks :)

[@CryptoGuide]

A high end system can check a few billion passwords per day no issue. So with your seed phrase, do you know the position of the three missing words? (If it's three missing words with known position, just run it and it should finish within a few days with you laptop)

[@황인성-z2c]

then After setting everything up to vast ai If there are no memorable tokens If I switch to a paid subscription, can you find it by remote control?

[@CryptoGuide]

If BTCRecover doesn't find anything and you have no idea what the password might be then it's unrecoverable.

[@pabloroskell7997]

Hello! Is there a way to consolidate the autosave file into one master autosave file? I've started a job with 6 instances, however I would like to increase the amount of machines being used, thus having a worker # issue.

[@CryptoGuide]

No, you can't change the number of workers either, as it will change the distribution of passwords that are checked by each worker.

[@londenlonden994]

If the session is interrupted, and must change to another computer when using the --autosave option, must the --enable-gpu --global-ws 4096 --local-ws 256 be the same? Can the number of workers be changed after the first and interrupted run with --autosave? In btcrecover-tokens-auto -file: - which command line options _cannot_ be used ? - can the allowed command line options be in any order?

[@CryptoGuide]

You can change options that don't impact the password generation, so enable/disable/change OpenCL or GPU acceleration is no problem. The order of the arguments doesn't matter either.

[@meowmeowvibesonly966]

hello admin Where is the putty configuration in vast ai settings? And where do I recharge my vast ai credit?

[@CryptoGuide]

Check the vast.ai documentation

[@meowmeowvibesonly966]

hello admin In this video's 5 minutes 7 seconds setting It said it would take about 9 days and 15 hours, and I kept it on all day today. I still have 8 days and 15 hours left. Do I have to keep it on for 8 days?

[@CryptoGuide]

Yep

[@meowmeowvibesonly966]

I'm going to try both ways to use vast ai or not. To do this with my computer's graphics card only How should I run the software? Is there no video using btcrecover by default?

[@CryptoGuide]

Just watch my other videos and read the documentation... Any of the passphrase or password recovery videos use the same syntax.

[@황인성-z2c]

If there is no token to remember Do I need to create an auto token document?

[@CryptoGuide]

If you have no idea what the password was then it's most likely unrecoverable. You could try a tokenlist with some wildcards, or try a passwordlist like the rockyou list.

[@meowmeowvibesonly966]

Can't move on to the next install and have to wait 8 days? How can I finish it as quickly as you do?

[@CryptoGuide]

I don't even understand the question... If your tokenlist takes 8 days to run them you should wait for it to finish before trying with a different tokenlist...

[@황인성-z2c]

Counting passwords... at least 89,000,000 passwords to try, ETA > --max-eta option (168 hours), exiting The result looks like this, what does it mean?

[@CryptoGuide]

It means what it says, you tokenlist generated more passwords that could be checked in 168 hours, if you want to allow more you need to use the --max-eta argument

[@cobys1981]

I have 4 5700xt and 2 rx 580 is there a way to make those work with btcrecover or is it only work with nvidia cards? I have ran tried --enable-opencl and it doesn't seem to work. Is there another command for amd cards?

[@CryptoGuide]

There are some issues open on GitHub relating to some newer AMD cards, but I don't actually have access to any AMD hardware to debug this. Is there a specific error you are getting?

[@rydmerlin]

So one enhancement is if each worker knows the existence of others then when one completes it can message the others to stop.

[@CryptoGuide]

Yea basically BTCRecover is intentionally designed to not have any networking code at all.

[@nyashafoya1015]

Hey man! Thank you for this guide. Just curious how do I use a custom wordlist with this?

[@CryptoGuide]

What do you mean custom wordlist? Do you mean just using your own tokenlist? (If so then just follow the BTCRecover docco for that)

[@nyashafoya1015]

@@CryptoGuide Okay I think I had my question wrong. I know the ending of the password just don’t know the first few characters (up to 6). By any chance would you know how to plug that in to the wordlist ?

[@CryptoGuide]

Just read the tokenlist docco btcrecover.readthedocs.io/en/latest/tokenlist_file/

[@황인성-z2c]

If you know 3 passwords Is it possible to change the password to 3 in the tokenlist document in the multi gpu with vast ai folder and run it?

[@CryptoGuide]

Yep, you need to modify the tokenlist to match your situation.

[@meowmeowvibesonly966]

set to vastai I don't know the command to unlock wallet dat. What command should I use in cmd to recover password?

[@CryptoGuide]

Just follow the example in this video for Bitcoin core

[@황인성-z2c]

@@CryptoGuide without connecting vast What kind of video is it on how to unlock walletdat with the default graphics card?

[@CryptoGuide]

All the commands in this video can be run on your local PC too

[@Test-nm2ug]

How can this be used with a BIP38 paperwallet?

[@CryptoGuide]

Before saying anything else, I should spell out that doing a BIP38 wallet recovery on rented servers is not secure, as there is no ability to do any kind of "Wallet Extract" or anything like that. The server owner could rob you... That said, basically it works the same as other wallet types in terms of tokenlists, password lists, etc, and you pass the BIP38 encrypted key via the command line with --bip38-enc-privkey argument. (As opposed to passing a wallet file, or extract) So something like btcrecover.py --bip38-enc-privkey 6PnM7h9sBC9EMZxLVsKzpafvBN8zjKp8MZj6h9mfvYEQRMkKBTPTyWZHHx --tokenlist path-to-tokenlist If you want to test it, the password for the encrypted key I posted above is btcr-test-password You can also specify a coin if it's something other than Bitcoin. (Eg: Litecoin, Dash) The main thing with vast.ai is that you want to have about 2 threads per GPU, so if you used somthing like a 4x 3090 server, you would also want to specify --threads 8

[@p.2617]

@@CryptoGuide recovery of a single private key for a multisig wallet would be less risky, correct?

[@CryptoGuide]

.

[@meowmeowvibesonly966]

Can't you crack the password with the graphic card in my computer without vast? and If there are multiple wallet dat files If there is a wallet dat file that you want to unpack among them, how do you specify it?

[@CryptoGuide]

You don't need a GPU or vast.ai, you can do all this on your local PC. You run BTCRecover once per wallet.dat file.

[@andyb8656]

I assume I can use it for dogecoin recovery as well yes? Thank you for your video.

[@CryptoGuide]

Which dogecoin wallet?

[@andyb8656]

@@CryptoGuide dogecoin qt wallet.

[@CryptoGuide]

Yea it works fine

[@andyb8656]

@@CryptoGuide Thank you

[@CryptoGuide]

.

[@meowmeowvibesonly966]

Then, after installing everything in the first install video Do I have to install everything in this video to unlock the wallet dat file password?

[@CryptoGuide]

Yep

[@fabiencadamuro2419]

Hi Crypto Guide Thanks for tour Amazing work ! I have a message running for minutes using vast : "Context failed : OUT OF HOST MEMORY" then works slowly or crashes, do you know how to resolve it ?

[@CryptoGuide]

You will get this error if you have too many threads for the amount of GPU memory you have. Just try with about two threads per GPU

[@fabiencadamuro2419]

It works smoothly, thank you@@CryptoGuide

[@CryptoGuide]

Hey Fabien Cadamuro, good to hear, feel free to shoot me a tip at www.reddit.com/user/Crypto-Guide/comments/czy13u/a_post_or_video_of_mine_was_helpful_feel_free_to/ :)

[@andrew4all236]

Hello Crypto Guide, will this work if i want to recover my seed word for my mew wallet that i have binance coin inside?

[@CryptoGuide]

How many of the seed words do you have? If you are missing all of them, then you can't recover the seed. (It's just math)

[@andrew4all236]

@@CryptoGuide I have the 22 words. I know the first 10 words in order but 14 words not in order and I'm missing the last two words

[@CryptoGuide]

The math on this doesn't really work. You need to find the missing words or the order of at least two of the 14

[@Theshorts_ult]

Hi, is it possible to increase the number of workers? For example if I am breaking a complex password and if I would like to distribute load onto 50 workers instead of 5 to break the password faster?

[@CryptoGuide]

You can add as many workers as you like to spread over multiple machines, but you hit a bottlekneck in terms of password generation performance, rather than hashing.

[@Theshorts_ult]

So I believe adding more workers only makes sense in terms of performance if the possible password combinations are already generated?

[@CryptoGuide]

That isn't what I said at all and where the bottleneck is will depend on the type of wallet, the hashing power of the systems, etc.

[@Theshorts_ult]

I am looking at btc core wallet and 8 times rtx 4090 per instance. It’s a costly one but it worth for the amount of btc I have in my wallet

[@CryptoGuide]

So what type of password recovery are you attempting? Have you done the math to see whether it's even practical?

[@BabarAli-kd6dw]

It's works on Tenup desktop?? Am I on right video sir??

[@CryptoGuide]

Yep

[@mohammedsaheer4700]

Nice guide liked, shared & subscribed !!! Can you please make a video on setting up vast ai for mining purpose? Like mining using nicehash or anything by renting on vasi ai

[@CryptoGuide]

Pretty sure it won't make money, but can give it a go :)

[@tenosburahmab4904]

Hallo sir,please tell me you mining on vast.ai no banned?

[@CryptoGuide]

I haven't bothered to try running mining software on the service but there isn't anything in their terms against it.

[@andrew4all236]

So if i know 22 words of my seed phrase and only missing two words. this step using online GPU can help me to recover my binance coin on mew wallet? if so, Is it the same steps you took in your video? Thanks again

[@CryptoGuide]

If you are only missing two words then just use a normal PC, it will solve it in a few hours. Using rented resources like vast.ai​​ isn't safe for seed based recoveries.

[@daxx883]

Do you think that will work with a D'CENT hardware wallet?

[@CryptoGuide]

Have you got an issue in your seed phrase? (Or are you trying to solve a BIP39 passphrase)

[@daxx883]

@@CryptoGuide Y lost the paper with the 24 seeds but remember like 6--7 and positions.

[@CryptoGuide]

Yea that's nowhere near enough. You can be missing 3-4 words tops... I'm sorry for your loss...

[@siupune6402]

an we use a window 10 on vast.ai server wih multi gpu?

[@CryptoGuide]

Vast.ai servers run Linux. (Ubuntu) You can control them using Windows.

[@johnlibre7483]

Hi, what is the probability that we succeed in cracking it - thank you

[@CryptoGuide]

It depends, do you have any idea what the password should be?

[@meowmeowvibesonly966]

Is it possible to automatically unlock wallet dat by setting up to vast ai in order and driving the graphic card?>

[@CryptoGuide]

There is nothing automatic about it. You need to provide a tokenlist or passwordlist that can be used, along with the typos you specified, to produce the correct password.

[@meowmeowvibesonly966]

@@CryptoGuide What should I do if I do not have a memorized password?

[@CryptoGuide]

You need to make a tokenlist based off your best guess, other likely passwords, etc.

[@meowmeowvibesonly966]

@@CryptoGuide If so, is there a separate video for making a token list? How to create a token list that includes uppercase and lowercase letters

[@CryptoGuide]

It's included in the videos for passphrase recovery, vast.ai, Metamask wallet and blockchain wallet recovery.

[@VoltageGoat]

Thank you.

[@CryptoGuide]

No problem

[@황인성-z2c]

If you remember 2 or 3 tokens Can you find your password?

[@CryptoGuide]

Depends on whether they were part of it and how long the password is...

[@GrigoriyMoroz]

Hello! Thank you for your work. Help please.I try to use many 3080. Before opencl doesn’t work. But now I reinstall Win10 and it work, but on test 1x3080 show 1.5 kP/s. It’s normal?

[@CryptoGuide]

What kind of recovery are you trying to do?

[@GrigoriyMoroz]

@@CryptoGuide I try recover blockchain wallet v3. But 1.54 kP/s show on test opencl.

[@CryptoGuide]

It could just be a v0 wallet which doesn't use opencl. Does the speed change without opencl?

[@GrigoriyMoroz]

@@CryptoGuide it ok. When I use -performance on wallet it show 14 kP/s. Thank you. Tell me please how accelerate -typos process?

[@CryptoGuide]

That wasn't what I asked...

[@अपनीदिल्ली]

Hello I downloaded bitcoin core and sync my wallet.dat now I’m facing one issue that I forgot my passphrase to transfer my BTC to other wallet. Can it be recovered? Please help me as I have 8 BTC in that wallet which I bought in 2009

[@CryptoGuide]

Have you attempted the process in this video yet?

[@अपनीदिल्ली]

@@CryptoGuide No just because I’m afraid of scammers if someone stolen it when I process online then I’ll be empty hand

[@CryptoGuide]

.

[@rickdeckard4788]

Nice video, congratulations your tools is powerful. How can i know the number of passwords from a tokenlist? Are there any online tool? When you put %4d is easy but when you put a lot of tokens is difficult. And when you have a numbers of passwords are there any way to calculate the time? Any tool online for example? Best regards.

[@CryptoGuide]

There is no tool, you just need to work it out yourself. (Or let the tool count it)

[@rickdeckard4788]

@@CryptoGuide Ok, another question about the safety. Using that service is dangerous because the owner can steal or see your password, true? Or are there any method to safe your work? For example, create a script that clear all the window when end and send you the password to you or encript the password in server. Best regards.

[@CryptoGuide]

You can safely use rented resources for things like blockchain.com, Bitcoin core and Metamask wallets because you are able to run the recovery using a wallet extract. (So only a small portion of the wallet) There is no safe way to do things like seed or BIP39 passphrase recovery on rented resources.

[@michalrybar9590]

How to add to my wallet.data to vast.ai for cracking password ?

[@CryptoGuide]

You will want to paste the wallet extract as I demo in the video

[@michalrybar9590]

How long take brute force 8 letter password and special symbols ?

[@CryptoGuide]

Is it all random or are there some dictionary words in there?

[@michalrybar9590]

@@CryptoGuide Random

[@CryptoGuide]

Yea it's not happening in a human lifetime if it was anything other than all lower case numbers or letters. (And if random it was likely upper, lower, number and symbols)

[@tmdllc]

Please add full recovery support for bitpay wallet and the original electroneum wallet and please release the entire BTC recover suite of tools As a native android app

[@CryptoGuide]

Depending on your wallet type it may be unrecoverable, as a lot of Bitpay stuff was multisig. You can already run it all on Android vua Termux, but it isn't officially supported, so you are on your own in terms of working it out.

[@tmdllc]

​@@CryptoGuide are all of the command prompts exactly the same? How do you feel about partnering with a list of Linux distributions to help btc recover become a default pre-installed application for helpful administrative financial recovery purposes?

[@tmdllc]

​@@CryptoGuide would you be able to release a updated and revised version that offers mastery level recovery abilities concerning multi-sig?

[@tmdllc]

​@@CryptoGuideis multi chain anything relevant to multi sig?

[@CryptoGuide]

BTCRecover already supports multisig via using an xpub.

[@fazltosun5636]

Hello Sir, My password is 9 char and I remember just one char. So is it possible to crack it with cloud...??

[@CryptoGuide]

Depends, what sort of characters would be in the password? (Numbers only, lower case letters, upper case, symbols, etc)

[@fazltosun5636]

@@CryptoGuide I remembered one more char... latest status Total char 9, I Know 2 char with exact locations and there is no special char.. just Upper-lower case letters and numbers... if I use 8x rtx 3090, cloud can crack it in short time..??

[@CryptoGuide]

That will take at least a few years depending on the type of wallet, even with that sort of hardware that you have specified.

[@fazltosun5636]

@@CryptoGuide ... need a hundred rtx 3090 may be more to crack password then.... :)

[@CryptoGuide]

Or just wait a decade until more computation power is available or the wallet is worth more.

[@tagaluginnatin7674]

I wonder if all this effort at recovery is deserved for a hardware wallet that reports 'invalid mnemonic' after being wiped and reset immediately after an online firmware upgrade was demanded when first plugging in onto the pc to check its contents after months of 'hodling' . Note: It was also bought from an online reseller instead of from the manufacturer.

[@CryptoGuide]

If your menmonicn had a typo then it wouldn't matter which vendor you went with... (Though some vendors validate it better at onboarding than others) That said, whether it's worth recovering the mnemonic comes down to how much value you have stored on the wallet.