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You are here: Home arrow Ethical Hacking Discussions and Related Certificationsarrow Network Pen Testingarrow CPT Practical - Feedback Please...
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Author Topic: CPT Practical - Feedback Please...  (Read 63583 times)
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SephStorm
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« Reply #15 on: November 18, 2010, 05:02:28 PM »

Welcome to EH.net and thanks for the review. I have been wanting to meet someone who took their online training.  Smiley
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H1t M0nk3y
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« Reply #16 on: November 19, 2010, 07:58:13 AM »

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Also, what are your general feelings on the CPT and the amount of weight it carries in the pen-testing field?

I am curious the hear what people think about CPT vs the other certs. Also, will it help getting through HR?
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rpm5099
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« Reply #17 on: November 24, 2010, 11:59:25 AM »

Greetings all:

I am in the process of taking the practical portion of the IACRB CPT exam. As most of you well know, you've got 60 days to complete and submit. I'm on the final step of the exam, which requires cracking of the root password on a Linux host. For me, this step seems to be taking quite a long time (15+ days now). While I realize that real-world password cracking can take days, months, or even years (depending on complexity), I'm curious to see if others have had the same experience. Also, what are your general feelings on the CPT and the amount of weight it carries in the pen-testing field? I've passed the CEH (InfoSec training) and have been considering the OSCP.  Thoughts on that?

My planned direction is to "break into" this field starting next year, and I'm looking for suggestions on a sound approach. Ideally, I'd like to work as an independent, providing services to small companies (in the long run), but I realize that true pen-testing is seldom a one-man show.

Thanks in advance!

You may want to find a better wordlist. I cracked IACRB's password in under 3 minutes. My method for cracking the password portion of the exam was to create a pseudo distributed system to do the cracking. I took 4 machines with about 2gigs of memory each, downloaded a couple of wordlists, made some voodoo regex's of the files, put them on different machines and fired them up. At best I think I was able to generate about 20 million attempts per minute,

The pw cracking portion was easy to me. It boils down to a few things when cracking passwords: 1) The PW cracker you're using 2) the wordlist(s) your using 3) the processor speed/memory of the machine doing the cracking. Here is a quick primer on password cracking: http://geodsoft.com/howto/password/cracking_passwords.htm without giving up the keys to the kingdom, this portion should not take you that long.

Did you manage to finish the second portion of the test or did you just start? There are always two ways to skin a cat you know Wink But that's all I will say on the exam.

As for the OSCP, points of view differ on this. Depending on what exam you receive for the CPT (I'm assuming here they have a few different deliverables), my technical exam was difficult as I had to work around my own exploit on a Bastille hardened version of Linux. Trust me when I tell you this, there was NO publicly available exploit for me to compromise the machine. I had to modify a few exploits with GDB in the background to get it working. Took me 3 days off and on to finish up the entire exam.



I'm in the same boat - I have successfully compromised both machines so I have the root password for one and a normal user account for the other.  I was able to do a privilege escalation and get the shadow file for the second machine and have been working to crack it but I’m stuck right now on that (to the user who posted about already having root access, cracking the password is required to pass).  Up to this point I have done every manipulation that I can think of without success.  I have used the wordlist mode with every permutation of rule possible that I could think of as well as the ones that are already built into john.  I’ve also used a number of additional dictionaries and applied rules to those, including adding known passwords and password formats from the root password of the other machine.  In incremental mode I’ve tried every different character set in john in password lengths up to the point where they can be cracked in a reasonable amount of time, and I've also tried some other character sets that were made more recently with very large sets of actual passwords.  The only real option that I havent tried is rainbow tables.  I know its a FreeBSD MD5 hash so I could try that next but I'm pretty sure that is not going to be the way to do it, even if it does end up working. 

Another thing is that I'm only getting about 12k c/s, and I'm running a pretty beast overclocked new CPU (quad core 64bit, not that that matters) - does this seem slow?  If so, can anyone direct me to instructions on how to speed it up?  I’m out of ideas at this point, and concerned I may be on the wrong track here, so any input would be greatly appreciated.

 
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sil
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« Reply #18 on: November 24, 2010, 01:52:22 PM »

Quote
Also, what are your general feelings on the CPT and the amount of weight it carries in the pen-testing field?

I am curious the hear what people think about CPT vs the other certs. Also, will it help getting through HR?

The easiest mechanism to determine the weight/validity/*sought_afterness is to see what's being sought on sites like Dice.com for example:

http://seeker.dice.com/jobsearch/servlet/JobSearch?op=302&dockey=xml/7/0/70bd6464f12b5852d249b887aee14659@endecaindex&source=19&FREE_TEXT=cpt+security&rating=99
Quote
* IT Security Certification (CISSP) completed or in progress preferred
* Other Security certifications, Security +, CEH, CPT, GIAC, CCSP recommended

---

Certification such as CISSP, CISM, GSEC, GIAC, CEH, CPT, PCI are strongly preferred ABITLITY TO TRAVEL The position requires up to 60% out-of-town travel to client locations.

http://seeker.dice.com/jobsearch/servlet/JobSearch?op=302&dockey=xml/7/0/700da35614c089061d4db102d1d09e3a@endecaindex&source=19&FREE_TEXT=cpt+security&rating=99

---


?Professional Certification such as CISSP, CISM, GSEC, GIAC, CEH, CPT, PCI are strongly preferred

http://seeker.dice.com/jobsearch/servlet/JobSearch?op=302&dockey=xml/2/6/2631309644952da36536ec87339e0748@endecaindex&source=19&FREE_TEXT=cpt+security&rating=99

---

<>Other Security Certifications (such as CEH, CPT, GCIH, etc.)

http://seeker.dice.com/jobsearch/servlet/JobSearch?op=302&dockey=xml/0/2/029f5e40307a2c1b58ddf142d35df6a6@endecaindex&source=19&FREE_TEXT=cpt+security&rating=99

------------------

We can see that HR departments know "OF" the CPT although most have zero idea of the differences in certifications. For example, I've seen penetration tester jobs where the requirements were a CISM or CISSP. I've seen security manager positions where the requirements were CCNA's. At the end of the day, it all boils down to presentation. How you present yourself and your capabilities. A resume is used to pass stage 1, the HR individual who has a written detail of the job duties. Normally, its the second and every interview thereafter that matter.

In 1998 I interviewed with Kroll O'Gara who had purchased Securify, who had purchased Packet Storm from Ken Williams. Back then I had zero certs but I had the experience. I was offered a job in their NYC office but turned it down the moment I was told I'd be wearing suits. (I kid you not). I prefer to be comfortable doing what I do without the suits thank you.

I can tell you from experience, certs don't always equate into offers. In fact, I had more offers before I had certs. Often for positions that were seeking CISSP's, CISA's, EnCE's, etc. While it helps to have them (certs) it all boils down to two things that trump certs at the end of the day:

1) What you know
2) Who you know


How I miss the dotcom daze
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hayabusa
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« Reply #19 on: November 24, 2010, 03:09:48 PM »

While it helps to have them (certs) it all boils down to two things that trump certs at the end of the day:

1) What you know
2) Who you know


How I miss the dotcom daze

Amen! (to missing the dotcom daze)
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~ hayabusa ~ 

"All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved." - Sun Tzu, 'The Art of War'


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H1t M0nk3y
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« Reply #20 on: November 24, 2010, 03:52:13 PM »

Thanks again sil (I often feel dumb when you answer my questions...  Grin)

Yes, my goal is to pass the HR layer. Of course, it is 1) What you know and 2) Who you know. But very recently, I was giving my business card to a "CISSP" guy. He immediately looked at my certs and when he couldn't CISSP, he turned it down... Man I hate that! But on the other hand, maybe I wouldn't even want to work for a guy like that...

So yes, certs and resumes get you an interview. Then you have to be able to answer the questions!
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Brian Cowen
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« Reply #21 on: November 29, 2010, 04:13:32 AM »

hello . . . !!!
i am also new here ,24,male. nice to meet you !!!
looking forward to get so much useful info and some good friends from here , nice forum , keep up the good work .Have a nice day . . !!!
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jtb3125
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« Reply #22 on: December 01, 2010, 10:33:39 AM »

So, just to update - I passed the CPT!

Here's a word of advice - when you get to the end of the 60 days, whether or not you completed cracking both root passwords...  Document the pentest, in detail, demonstrating that you know what you've done and what the results mean, and send that puppy in...


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prtrnr13
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« Reply #23 on: December 13, 2010, 01:39:15 PM »

jtb3125, Congrats on passing the CPT!!! I am trying to finish my CPT practical as well.  I have all the passwords except the last root password.  You said that you passed the CPT and your advice was to turn it in whether or not both passwords were cracked.  Did you crack both passwords?
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Smeghead
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« Reply #24 on: March 18, 2011, 11:36:55 AM »

I too am on the last stage, I have escalated privileges on the second box but JTR is taking foooorreeeevver to crack this root password.

Im getting 7100 c/s how long should I expect it to take?
Should I be using something else? JTR is a hybrid so I would have thought it was the right tool to use.
Dont suppose anyone would like a crack at my shadow file with your huuge clusters?  Smiley


My 2c about Infosec Institute is that you CANNOT do better than them for your CPT/CEH training, unless you are lazy and dont even try its virtually impossible to fail. Excellent class, excellent instructors.
« Last Edit: March 18, 2011, 01:09:07 PM by Smeghead » Logged
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« Reply #25 on: March 18, 2011, 02:08:41 PM »

As suggested by sil, you might try other wordlists. It shouldn't take too long to solve this part of the challenge.
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Smeghead
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« Reply #26 on: March 18, 2011, 02:34:16 PM »

I downloaded a 46MEG wordlist file and it got through it in about 10 minutes with no luck.
I got a 400MB one im trying now but if that doesnt work...

Is brute force the only option? It could take weeks! months!?!

Also will JTR only try words in the wordlist? I thought it was a hybrid which means it would try those words + those words with special characters intermixed right?
« Last Edit: March 18, 2011, 03:27:58 PM by Smeghead » Logged
Smeghead
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« Reply #27 on: March 18, 2011, 04:04:42 PM »

Yay! That did it in SIX minutes!

command used:

john --rules --wordlist=mangled.lst all.lst  shadow

mangled.lst = 400MB
all.lst - 45MB
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ziggy_567
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« Reply #28 on: March 18, 2011, 05:34:43 PM »

With dictionary attacks, your success is not based solely on the size of the dictionary - its the quality of the dictionary. It doesn't matter how big your dictionary is....if the word is not in there, you will never crack it.

What you are looking for with a brute force attack in Jtr is incremental or external. Incremental is the one most often used. I would use brute forcing only as a last resort, as it is usually not successful (especially with a small set of passwords).
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SephStorm
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« Reply #29 on: March 20, 2011, 03:39:10 AM »

EDIT:whoops.
« Last Edit: March 20, 2011, 03:41:09 AM by SephStorm » Logged

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