Terrible hashing with Nvidia and hashcat (Kali 2016.2 Rolling)

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2016-09-14
Sys0p1791

Terrible hashing with Nvidia and hashcat (Kali 2016.2 Rolling)

I have been troubleshooting this for a couple of days and finally have the NVidia drivers installed properly from piecing together other posts of other user's woes:

Code:

root@kali-desktop:~# lsmod | grep nouveau root@kali-desktop:~# lsmod | grep nvidia nvidia_uvm 434176 0 nvidia_modeset 741376 6 nvidia 10080256 120 nvidia_modeset,nvidia_uvm drm 360448 6 nvidia root@kali-desktop:~# glxinfo | grep "direct rendering" direct rendering: Yes

I'm confident that the nouveau driver is blacklisted

Code:

root@kali-desktop:~# cat /etc/default/grub | grep nouveau GRUB_CMDLINE_LINUX_DEFAULT=" nouveau.modset=0"

However pyrit doesn't see the cuda cores at all

Code:

pyrit list_cores Pyrit 0.4.0 (C) 2008-2011 Lukas Lueg http://pyrit.googlecode.com This code is distributed under the GNU General Public License v3+ The following cores seem available... #1: 'CPU-Core (SSE2)' #2: 'CPU-Core (SSE2)' #3: 'CPU-Core (SSE2)' #4: 'CPU-Core (SSE2)' #5: 'CPU-Core (SSE2)' #6: 'CPU-Core (SSE2)' #7: 'CPU-Core (SSE2)' #8: 'CPU-Core (SSE2)'

Strangely hashcat seems to: I grabbed a very simple md5 hash from http://www.miraclesalad.com/webtools/md5.php and tested it

Code:

hashcat -m 0 -d 1 79cfeb94XXXXXXXXXXXXX -o ?l?l?l?l?d?d?d hashcat (v3.10) starting... OpenCL Platform #1: NVIDIA Corporation ====================================== - Device #1: GeForce GTX 970, 1023/4095 MB allocatable, 13MCU - Device #1: WARNING! Kernel exec timeout is not disabled, it might cause you errors of code 702 See the wiki on how to disable it: https://hashcat.net/wiki/doku.php?id=timeout_patch OpenCL Platform #2: Mesa, skipped! No OpenCL compatible devices found WARNING: NVML library load failed, proceed without NVML HWMon enabled. Hashes: 1 hashes; 1 unique digests, 1 unique salts Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates Rules: 1 Applicable Optimizers: * Zero-Byte * Precompute-Init * Precompute-Merkle-Demgard * Meet-In-The-Middle * Early-Skip * Not-Salted * Not-Iterated * Single-Hash * Single-Salt * Raw-Hash Watchdog: Temperature abort trigger set to 90c Watchdog: Temperature retain trigger set to 75c

There is that bit about no OpenCL though...and performance is TERRIBLE

Code:

Session.Name...: hashcat Status.........: Running Input.Mode.....: Pipe Hash.Target....: 79cfeb94XXXXXXXXXXXXX Hash.Type......: MD5 Time.Started...: Tue Sep 13 21:44:39 2016 (1 min, 9 secs) Speed.Dev.#1...: 0 H/s (0.00ms) Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts Progress.......: 0 Rejected.......: 0 HWMon.Dev.#1...: N/A

This is an NVidia GTX 970 - so I would expect a *little* more than 0 H/s!

I feel like I must be missing something on the OpenCL side since Pyrit doesn't see anything - but I'm stumped
2016-09-14
Pietje

Maybe offtopic but can you tell us how did you get the Nvidia drivers to work????
2016-09-15
TitoOP

How did you install the Nvidia drivers??
2016-09-17
John_Doe

lol, I'm only a dummy but I'd bet hashcat is using your cpu, not your GTX970. Ya think?
2016-09-17
iojymbo

John_Doe is right, you use only your CPU, not your GPU, look at the documentation:
- http://docs.kali.org/general-use/ins...-on-kali-linux
2016-09-20
John_Doe

Hey, while I'm here, how does noob Sys0p1791 manage to post "code windows"? I tried to post the text from my terminal and Kali_org threw a firewall stop at me. Then I looked at the page source and replicated the html wrappings but I still got the firewall stop. How do I show you guys text from the terminal?
>>EDIT:
Oh, when I make a new thread there's a # symbol to wrap text into a code box, but now in "edit" there is no option for same. Maybe if I click "Go Advanced"? AHA, there it is!
BTW, google didn't know this. lol
2016-10-01
Sys0p1791

There are several guides out there for installing the nvidia drivers - this link will give you the steps direct from the kali docs (which is the first place I started)

It turns out that my problem wasn't with the drivers - it was somewhere with the CUDA libs / paths etc.

ULTIMATELY what resolved this was by following that document guide - with CAVEATS

Whenever installing something in that doc with apt - look closely at the "suggested packages" line. MANY of those packages related to CUDA so I ALSO installed all of those (as well as a push driver from Kali to the latest nVidia version)

After that last pass, also including all of the suggested packages (it was like 3 in the morning so I don't remember what they were), my hashing speeds were up to what I would expect with this card.
2016-10-05
poojinky

Yea, the Kali nVidia guide fails here 'apt-get install -y linux-headers-$(uname -r)' for me, I had to use aptitude but then the rest of the guide is okay, (if only the guides where rolling too)

I'm also having OpenCL issues with Kali, seems there is no clarity, I'd consider hashcat a core utility but for me Kali rolling is turning into a hodgepodge of files that might work and if they dont, it's probably your fault , and you have to read a hundred diluted thumb in the air guides to blag your way through getting it working, and that's the worst feeling when you get it working and have no idea why

anyway, i thought i would chip in too, I did less cyber-dependency-disco-dancing when Kali wasn't rolling, blog-posts and tutorials had a longer shelf life.