Python zip password cracker

ZipFile "secret. BadZipfile: print "[! When I went back to the directory, I found the file that I originally hid in the archive. Ray Doyle. Previous Post Building a Python reverse shell. Yea, for sure, but it is just a dictionary attack cracker.

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One reason why this does not work properly for multiprocessing ; you must open the zip file in each subprocess, otherwise you can be hurt by sharing filehandles.

I think that, in addition to the problem of the Global Interpreter Lock GIL , you might be using the threads incorrectly. Judging from the loop, you're starting a completely new thread for every password line in your file -i. Starting a new thread for only a single attempt is, as you've discovered, expensive and not working out as you expected.

If you do this using multiprocessing , then it'll be even slower because creating a completely new process just to for a single try is even more expensive than creating a thread.

For example, if you have lines in the file, you could break it up into 4 parts i. Using multiprocessing here would be advantageous because you can avoid the GIL. However , keep in mind that you'd still have multiple processes accessing the same file simultaneously, so make sure you account for this when trying to extract the file, etc.

You should take care not to overwhelm your PC cores. Then, as each process consumes a sub-list and terminates, a new process is created or existing one re-assigned, if using a process pool to handle yet another sub-list waiting in your queue.

If one of the children completes successfully, then you might want to get the parent process to kill all the other children to avoid unnecessary resource usage. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Multithreading in zip password cracker Ask Question. Asked 5 years, 11 months ago. Active 5 years, 1 month ago.

To read the zip file in Python, we use the zipfile. ZipFile class that has methods to open, read, write, close, list and extract zip files we will only use extractall method here :. Notice we read the entire wordlist and then get only the number of passwords to test, this can prove useful for tqdm so we can track where we are in the brute-forcing process, here is the rest of the code:.

Since wordlist now is a Python generator, using tqdm won't give much progress information, that's why I introduced the total parameter to give tqdm the insight on how many words are in the file. We open the wordlist and read it word by word and tries it as a password to extract the zip file, reading the entire line will come with the new line character, as a result, we use the strip method to remove white spaces.

The method extractall will raise an exception whenever the password is incorrect, so we can pass to the next password in that case, otherwise, we print the correct password and exit out of the program.

I have edited the code a little to accept the zip and wordlist files from command line arguments, check it here.