Brute-force more then 8 with JTR

Hello, in this guide I will show how to make JTR (John the Ripper) Brute-force, pass-phrases with lengths greater than 8, with Incremental mode.

(Note: this guide was done in Aby$m-OS Beta 0.0.0.3)

Step 1: Download JTR
Step 1a: Open Firefox and click on the JTR bookmark.




Step 1b: Download JTR archive file




Step 2: Extract JTR
Step 2a: Open a Terminal application, and type “tar xfv john-[Version].tar.gz” and press Enter.


Step 3: Change current working directory to “src” directory
Step 3a: Open a Terminal window and type “cd john-[version]/src/” then press Enter




Step 4: Modify the “params.h” file
Step 4a: With a file editor of your choice, open “params.h”.
Step 4b: Scroll down to the sub-section titled “Charset parameters”.
Step 4c: modify "#define CHARSET_LENGTH 8" value from the default of 8 to your desired value and save the file.



Step 5: Compile JTR
(Note: by default “Aby$m-OS Beta 0.0.0.3” does not include programs that compile such as make, gcc etc…, in-order to compile within “Aby$m-OS Beta 0.0.0.3” you will need “compiletc.tcz”)

Step 5a: Download and install “compiletc.tcz”

Here is a guide for the installation of “compiletc.tcz”:
To download and install “compiletc.tcz” simply click on the “Apps” Icon on the icon tray, next select “Apps” > “Cloud (Remote)” > “Browse”


type “compiletc.tcz” into the search box and press Enter > select “compiletc.tcz” from the left hand pane and click “Go” at the bottom.



Step 5b: Follow “Step 3”, next type “make” to get a list of systems available.
Step 5c: Type “make clean [SYSTEM]” and press Enter.
Wait for the process to complete it, might take some time to compile.




Step 5d: Next type “cd ..” press Enter then Type “cd run” and press Enter


Step 6: Create a JTR pot file
You can create a dictionary file with the current installation of JTR in “Aby$m-OS Beta 0.0.0.3” with the command:
“john --incremental=all --stdout | sed ‘s/^/:/; 10000000q’ > john.pot”

(Note: the file will be 79 MB , and after the file has been created the Terminal will stop functioning you will have to close it and open a new one)

You can also use your own Dictionary file to create a JTR pot file with the command:
“cat [Dictionary file] | sed 's/^/:/' > john.pot”
After the JTR pot file has been created, move the pot file to the “run” directory, or you can initiate the command from the “run” directory.


Step 7: Make JTR character set file

Step 7a: Change the working Directory to the “run” directory,
Next type “./john --make-charset=custom.chr” and press enter

(Note: Make sure that the JTR pot file from “Step 6”, is placed into the “run” directory before you press enter)



Step 8: Create custom incremental mode
Step 8a: within the “run” directory use a file editor to open “john.conf” next
Scroll down to the sub-section titled “Incremental modes” then type:
[Incremental:Custom]
File = $JOHN/custom.chr
MinLen = [#]
MaxLen = [#]
CharCount = 95




Here is a summary of the steps:

• · Download JTR
• · Extract JTR
• · Change current working directory to “src” directory
• · Modify the “params.h” file
• · Compile JTR
• · Create a JTR pot file
• · Make JTR character set file
• · Create custom incremental mode

Now you can use JTR to Brute-force more than the default of 8.
Enjoy.

~Aby$m.

 

I believe the problems is that TCL which Aby$m-OS is based on, uses "Busybox" for command-line tools where as Backtrack doesn't, that's why I believe, you are receiving an error in BT.

You could try installing Busybox in BT or find the BT command that matches the Busybox command.

 

Did you follow "Step 7a: Change the working Directory to the “run” directory," ?

The new JTR version that is compiled in "Step 5" is located within the run directory.

Also DO NOT create the character set file with the normal JTR, use the JTR version that you compiled in "Step 5".

When you use the command "john --make-charset=custom.chr" you are using the normal JTR version within "Aby$m-OS Beta 0.0.0.3"

When you use the command “./john --make-charset=custom.chr” you are using the new compiled version from "Step 5" when it is run from the "john-1.7.9-jumbo-7/run/" dirctory


~Aby$m

 

@Shirley

It appears you have miss-interpreted one of the instructions on the site you linked to, specifically the fourth step which deals with the gcc options located within the Makefile:

"open the Makefile in whatever text editor you use... and uncomment the two lines listed below under # gcc with OpenMP…."

It appears you have attempted to compile JTR with gcc rather then modify the Makefile.


~Aby$m.

 

If you simply wish to compile a new version of JTR just follow step 1 to step 3a of my guide, the other steps are for a more specialized purpose and can be ignored.

Once you finished following those steps, you can then use the newly compiled JTR by changing the working directory into the /run directory and running a JTR command such as "./john [option]".

In summary:

• Download JTR
• Extract JTR
• Change current working directory to “src” directory
• Compile JTR

However why do you need to compile a new version of JTR when Backtrack includes JTR by default Shirley?



~Aby$m.