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All,
I'm wondering if you can offer some assistance. I'm trying to test out hashcat and learn how to use the program. When I run the following command it runs for about 3 minutes and ends in "killed". What am I doing wrong? The database is very large 2GB so I'm assuming perhaps this could be the issue?
root@The-Distribution-Which-Does-Not-Handle-OpenCL-Well (Kali):/usr/share/hashcat# ./hashcat.bin -m3200 -a0 /root/users.txt /usr/share/wordlists/rockyou.txt
Initializing hashcat v0.49 with 1 threads and 32mb segment-size...
Killed
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(08-28-2015, 05:21 PM)DyOS Wrote: Initializing hashcat v0.49 with 1 threads and 32mb segment-size...
Well you should at lease use the latest hashcat v0.50 instead. And "1 thread"? Is that a VM or some ancient CPU? How much system RAM is there?
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"Killed" usually happens when your system runs out of ram.
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08-28-2015, 11:53 PM
(This post was last modified: 08-28-2015, 11:53 PM by mastercracker.)
And to test this, just try the same command line on a small amount of hashes of hashes (5-10).
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Yeah, you're running up against the kernel OOM killer. I know what you're working on, and you're trying to load 36,150,089 salts. You likely do not have anywhere near enough RAM for that (you need around 48GB free.)
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Errr...trying 36M hashes...bcrypt ones, on a single-threaded CPU? Good luck.
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Yea, honestly I only care to crack one hash to prove the theory. So if it's a memory problem how can I tell hashcat to only load X hashes? Also, I'm sure some of you have already had a run at this file. Using the standard rockyou.txt how many do I need before it cracks just one? Thanks for all the feedback.
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(08-31-2015, 10:45 PM)DyOS Wrote: how can I tell hashcat to only load X hashes?
Er, only put X hashes in the hash file?
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(08-31-2015, 11:23 PM)rico Wrote: (08-31-2015, 10:45 PM)DyOS Wrote: how can I tell hashcat to only load X hashes?
Er, only put X hashes in the hash file?
Yea, I'm just not sure if I have enough memory to even open or manipulate the file. I will give that a shot.
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08-31-2015, 11:37 PM
(This post was last modified: 08-31-2015, 11:51 PM by rico.
Edit Reason: edit command from append to overwrite
)
(08-31-2015, 11:26 PM)DyOS Wrote: Yea, I'm just not sure if I have enough memory to even open or manipulate the file. I will give that a shot.
head -n5
/root/users.txt >
/root/newuser5.txt
That will copy the first 5 lines ( -n5 ) from users.txt to a new file called newuser5.txt
I don't think that will use much memory. Or maybe in your case use -n1 (I assume hashes are one per line?) and use the new file in your command.
