Go Back   Xisp.org Forums > Porn Password Cracking > Porn Password Cracking Help Section

How to optimize JTR ?

Reply
Views: 716 - Replies: 4  
Thread Tools Display Modes

How to optimize JTR ?
Old 04-13-2005, 09:27 AM   #1
kkryzys
Guest
 
Posts: n/a
Threads: 5107
Default How to optimize JTR ?

Hi
I have a little problem with jtr.
I've couple ibill format passes and i want to decipher them with jtr.
can anybody explain haw to optimize jtr to do this?
As we know ibill passes are 8 chars long uppercase and lowercase and digits.
Usually in pass is at least 1 uppercase, 1 lowercase and 1 digit, so meybe is possible to change something in john.ini to reduce time of searching by jtr.
So traying combinations like this:

amabsdfb
asmdfb3q
fasdf8asx
IIIIIIaaaa
99999IIII
etc.
is nonsense

I changed MinLen to 8 and i think that saved some time. jtr doesn't waste his time for shorther combinations. I'm not a coder so i don't know how change john.ini to help jtr more ;)
Maybe you know or maybe you have "preibilled" john.ini ? :)
Regards
  Reply With Quote

Old 04-13-2005, 10:36 AM   #2
sPlico
The sPlicster
 
sPlico's Avatar
 
sPlico is offline Offline
Join Date: Jan 2005
Location: Croatia
Posts: 9,486
Threads: 407
sPlico is on a distinguished road
Default

Quote:
Originally Posted by kkryzys
As we know ibill passes are 8 chars long uppercase and lowercase and digits.
Ehm, that's the first to me :) It varies site per site :)

About optimising jtr, best thing you can do is make a special charset, but if its that combination you mentioned it will still take shitload of time, and even then...
  Reply With Quote

Old 04-13-2005, 10:38 AM   #3
Jayman
Site Cracker
 
Jayman is offline Offline
Join Date: Jan 2005
Posts: 1,004
Threads: 104
Jayman is on a distinguished road
Default

@kkryzys

Ibill doesn't have a format, its' a Billing Agent that can adapt to the wishes of a Webmaster.

:)

As it seems you've located the MinLen. I presume you're talking about the Incremental Section, in particular the ALL section. You might want to change the CharCount to 36, which will go through AlphaNumeric combinations.

Another alternative is to use the -makechars command

john -makechars:FILE pfile

where FILE is the name of the .chr file
where pfile is the name of your password file

eg
john -makechars:dp.chr deluxepass.pf

This will make a characterset based on any decryptions I've done for the deluxepass.pf Password file


Once you've created your character set you need to add it to your john.ini

[Incremental:deluxepass]
File = $JOHN/dp.chr
MinLen = 1
MaxLen = 8
CharCount = 36

You can then run it using

john i:deluxepass test.pf
  Reply With Quote

Old 04-14-2005, 04:43 AM   #4
kkryzys
Guest
 
Posts: n/a
Threads: 5107
Default

thanks for replay.
I prepared my own john.pot :

88D7g9XBwBe/U:qwertyui
88D7g9XBwBe/U:oplkjhgf
88D7g9XBwBe/U:dsazxcvb
88D7g9XBwBe/U:nmQWERTY
88D7g9XBwBe/U:UIOPLKJH
88D7g9XBwBe/U:GFDSAZXC
88D7g9XBwBe/U:VBNM1234
88D7g9XBwBe/U:567890

and then
john -makechars:custom.chr john.pot

and then

[Incremental:custom]
File = $JOHN/custom.chr
MinLen = 8 / i'm sure that my passes are 8 char long and theoreticaly each char
MaxLen = 8 / can be used with the same probability
CharCount = 62
------------------------
Jayman
I'm not sure but most of posted dp passes i saw have 7 chars. only lowercase and digits.
(So i think more optimal will be MinLen = 7 MaxLen = 7)
3 first chars are lowercase and usually couple digits at the end of pass. so using real dp.pot instead "my fake john.pot" will be easier for jtr to found weak login i think.

regards
  Reply With Quote

Old 04-15-2005, 04:10 AM   #5
Jayman
Site Cracker
 
Jayman is offline Offline
Join Date: Jan 2005
Posts: 1,004
Threads: 104
Jayman is on a distinguished road
Default

I was using deluxepass as an example, not as a real case :)
  Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -4. The time now is 03:50 PM.


vBulletin skin developed by: Xisp.org Crew
Powered by vBulletin®
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
2005 Copyright Xisp.org