Decrypter Module

Ultimate Decrypter, decrypt the given ciphertext by all known decoders. Evaluate each result and return the best result.

Usage

[-h] (-c CIPHERTEXT | -f FILENAME) [--version] [-s DECODER] [-cl] [-cw] [-cf FORMAT] [-n NUMBER] [-v] [-o FILENAME]

Arguments

Positional Arguments

-f Filename:
Type:str
Aliases:--filename
Explenation:Set path for file to be decrypted

or

-c Ciphertext:
Type:str
Aliases:--ciphertext
Explenation:Paste ciphertext

Optional Arguments

-h:
Type:flag
Aliases:--help
Expleneation:Show help message and exit
–version:
Type:flag
Expleneation:Show the version of the tool
-d:
Type:str
Options:ascii, base64, caesar, reverse, hash
Aliases:--decoder
Expleneation:Use specific decoder
-n Number:
Type:int
Default:1
Aliases:--number
Expleneation:Number of results to be printed (sorted by descending score)

Note

If none from below is selected, the script uses all the evaluators together

-cl:
Type:flag
Aliases:--checkLetter
Expleneation:Use letter analysis to evaluate the results
-cw:
Type:flag
Aliases:--checkWord
Expleneation:Use word analysis to evaluate the results
-cf Format:
Type:str
Aliases:--checkLetter
Expleneation:Search the CTF flag to evaluate the results

Important

If the CTF normal flag is omryCTF2020{XXXXXXXXXXXXXXX}

you need to enter: omryCTF2020{}

-v:
Type:flag
Aliases:--verbose
Expleneation:Verbose mode, printing additional information
-o Filename:
Type:str
Aliases:--output
Expleneation:Path for the file the results will be saved in

Examples

  • Using code.txt file and use all evaluators:

    >>> -f code.txt

  • Using code.txt file and use letter analysis evaluator:

    >>> -f code.txt -cl

  • Decrypt string and use Base64 decoder:

    >>> -c VGhpcyBpcyBhbiBleGFtcGxlIQ== -d base64

Important

When using -c flag, when the ciphertext has whitespaces in it, the argument should be written between quotation marks "

  • Decrypt string (with whitespaces in it) and use flag evaluator:

    >>> -c "}wonK_tnoD_I{0202FTCyrmo galf ym si erehW" -cf omryCTF2020{}

  • Using code.txt file, return the top 5 results and save it in results.txt file :

    >>> -f code.txt -n 5 -o results.txt

Code

This module uses the Decoders Package to Decode the ciphertext.
And uses the Evaluators Package to evaluate each result plaintext.