help with dictionary required

[Jackjames]

Hi all,

I am trying to get the password of an older blockchain wallet - and have tried btc-recover for some days now.
Unfortunately, the password is pretty complex - and I could not get many hints about the correct combination... so I would like to know, if there's a way to build up a token list like it can be done in btc-recover or similar...

the following facts are known:

- total lenght: 26 characters
- first 6 characters are known - but not how upper and lower case letters are used... (like: HeLLo, hELlo, heLLO, etc.)
- 10 characters are mostly unknown
    - maybe, 6 letters are known, but not how upper and lower case letters are being used - AND their position within the 10 characters
- the last 10 characters are known

I think, simple bruteforce will take too long with 26 characters, and since some patterns are known, I would like to use a wordlist - but how can I create the different variations of these words?

Thanks for any help - would be much appreciated

Using a 3090 will give you 20k hashes so will reduce a max of 10 so that still larger then 1 year.

Thanks.
That's what I've thought :-(
And that's only with one out of 64 possible combinations for the first 6 characters... so in total, I would need almost 64 years to try all these combinations - if the last one would be the correct one ...

I think, we need to consider any other method to lower the amount of combinations by a lot!

For the first 6 characters you can make a charset with the letters in Capitols and normal.

Last 10 you use the part of the password you know.

The middle you can try and use ?l that should narrow it down a lot?