Cryptohaze.com

Hello All,

I have plenty of CPU & GPU power at my disposal and would like to generate some larger NTLM tables. I have found some examples for settings but would like to get community input before I dedicate my systems for the long term.

Examples:

GRTGen-CUDA -h MD5 -c ./charsets/charsetall -l 6 -i 0 --chainlength 50000 --numchains 10000000 -t 128 -b 128 -m 500

GRTGen-CUDA -h MD5 -c ./charsets/charsetall -l 7 -i 0 --chainlength ? --numchains ? -t 128 -b 128 -m 500
GRTGen-CUDA -h MD5 -c ./charsets/charsetall -l 8 -i 0 --chainlength ? --numchains ? -t 128 -b 128 -m 500
GRTGen-CUDA -h MD5 -c ./charsets/charsetall -l 9 -i 0 --chainlength ? --numchains ? -t 128 -b 128 -m 500

Some Rainbow Tables settings I found, not sure if they are applicable to GRTGen:

charsetall -l 7 -i 0 --chainlength 40000 --numchains 67108864
charsetall -l 8 -i 0 --chainlength 200000 --numchains 67108864


Also I found my video cards "GeForce GTX 560 Ti" have a memory limit of --numchains 27199985. This suggests that I can only change the --chainlength and table number to obtain 99% effectivness. Are there any limitations / best practices around --chainlength? Playing with the online table calculator yields various combinations that appear to get me to the 99% effectiviness, but would like community feedback on the best values to use. Thank you so much for your input.

Regards,
Damaged

DamagedPacket wrote:I have plenty of CPU & GPU power at my disposal and would like to generate some larger NTLM tables.

Easiest option? Download the already generated NTLM len 6, 7, and 8 tables.

https://cryptohaze.com/gpurainbowtables.php

Also I found my video cards "GeForce GTX 560 Ti" have a memory limit of --numchains 27199985. This suggests that I can only change the --chainlength and table number to obtain 99% effectivness. Are there any limitations / best practices around --chainlength? Playing with the online table calculator yields various combinations that appear to get me to the 99% effectiviness, but would like community feedback on the best values to use. Thank you so much for your input.

You generate a bunch of tables and merge them - it involves a few TB for length 8 worth of parts that are merged together.

So "GRTGen-CUDA -h NTLM -c charsetall --chainlength 200000 --numchains 20000000 --numtables 1000 ... "

Then use GRTMerge to merge the parts into a single whole.

I swear I wrote a tutorial for this, but I can't find it.

But if the question is the NTLM len 6, 7, 8 tables, either download them, or buy a set on disk. https://cryptohaze.com/purchase_tables.php