MD5(Unix) bug

[infinity432]

I'm having a weird issue with the Unix MD5 hash type. After about two minutes of running, one GPU completely drops out, and the other that continues seems to not be processing correctly.

Also, when I attempt to quit using "q" after this happens, the process hangs and ultimately becomes zombied. I only seem to have an issue with this hash type, the others I've tested seem to work fine.

Thanks for the help in advance.

Code:

# /opt/oclHashcat-plus-0.09/oclHashcat-plus64.bin -m 500 -r ~/rules/generated.rule --remove --outfile test.cracked test.hash /var/passwords/wordlists/all_breaches.txt oclHashcat-plus v0.09 by atom starting... Hashes: 9 total, 9 unique salts, 9 unique digests Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes Rules: 14729 Workload: 16 loops, 8 accel Watchdog: Temperature abort trigger set to 90c Watchdog: Temperature retain trigger set to 80c Device #1: Cayman, 2048MB, 950Mhz, 24MCU Device #2: Cayman, 2048MB, 950Mhz, 24MCU Device #1: Kernel /opt/oclHashcat-plus-0.09/kernels/4098/m0500.Cayman_938.1_1.4.1741.kernel (2898852 bytes) Device #2: Kernel /opt/oclHashcat-plus-0.09/kernels/4098/m0500.Cayman_938.1_1.4.1741.kernel (2898852 bytes) Scanning dictionary /var/passwords/wordlists/all_breaches.txt: 1047576 bytes (0.59%), 102092 words, 150368361 Scanning dictionary /var/passwords/wordlists/all_breaches.txt: 61807285 bytes (35.03%), 6324145 words, 931483 Scanning dictionary /var/passwords/wordlists/all_breaches.txt: 136185486 bytes (77.19%), 13762913 words, 2027 Scanned dictionary /var/passwords/wordlists/all_breaches.txt: 176433682 bytes, 17781234 words, 261899766128 k eyspace, starting attack... [s]tatus [p]ause [r]esume [b]ypass [q]uit => s Status.......: Running Rules.Type...: File (/root/rules/generated.rule) Input.Mode...: File (/var/passwords/wordlists/all_breaches.txt) Hash.Target..: File (test.hash) Hash.Type....: md5crypt, MD5(Unix), FreeBSD MD5, Cisco-IOS MD5 Time.Running.: 17 secs Time.Left....: 9 days, 13 hours Time.Util....: 17842.4ms/2036.1ms Real/CPU, 12.9% idle Speed........: 2848.5k c/s Real, 3249.6k c/s GPU Recovered....: 0/9 Digests, 0/9 Salts Progress.....: 94114509/2357097895152 (0.00%) Rejected.....: 43291341/94114509 (46.00%) HWMon.GPU.#1.: 78% Util, 67c Temp, 30% Fan HWMon.GPU.#2.: 78% Util, 65c Temp, 30% Fan [s]tatus [p]ause [r]esume [b]ypass [q]uit => s Status.......: Running Rules.Type...: File (/root/rules/generated.rule) Input.Mode...: File (/var/passwords/wordlists/all_breaches.txt) Hash.Target..: File (test.hash) Hash.Type....: md5crypt, MD5(Unix), FreeBSD MD5, Cisco-IOS MD5 Time.Running.: 1 min, 6 secs Time.Left....: 9 days, 13 hours Time.Util....: 66762.4ms/7571.9ms Real/CPU, 12.8% idle Speed........: 2850.7k c/s Real, 3259.4k c/s GPU Recovered....: 0/9 Digests, 0/9 Salts Progress.....: 354287643/2357097895152 (0.02%) Rejected.....: 163971099/354287643 (46.28%) WMon.GPU.#1.: 75% Util, 77c Temp, 35% Fan HWMon.GPU.#2.: 75% Util, 76c Temp, 33% Fan [s]tatus [p]ause [r]esume [b]ypass [q]uit => Status.......: Running Rules.Type...: File (/root/rules/generated.rule) Input.Mode...: File (/var/passwords/wordlists/all_breaches.txt) Hash.Target..: File (test.hash) Hash.Type....: md5crypt, MD5(Unix), FreeBSD MD5, Cisco-IOS MD5 Time.Running.: 2 mins, 8 secs Time.Left....: 11 days, 8 hours Time.Util....: 128042.7ms/11064.5ms Real/CPU, 9.5% idle Speed........: 2402.3k c/s Real, 3270.4k c/s GPU Recovered....: 0/9 Digests, 0/9 Salts Progress.....: 546749055/2357097895152 (0.02%) Rejected.....: 239155839/546749055 (43.74%) HWMon.GPU.#1.: 0% Util, 64c Temp, 57% Fan HWMon.GPU.#2.: 99% Util, 77c Temp, 43% Fan # ps aux | grep oclHashcat root 1573 11.1 0.0 0 0 pts/1 Zl+ 10:27 0:55 [oclHashcat-plus] <defunct>

[undeath]

sounds like a hardware defect

[KT819GM]

Downclock your cards a bit. Bad mhz/vcore voltage ratio or bad power supply.

[NeonFlash]

my first guess would have been that the hashing algorithm you are trying to attack is highly iterated and as a result of that, excessive load on your GPUs might cause them to hang or drop out.

second possibility is of a driver issue, make sure you are running the latest release of ATI Catalyst.

Are you able to successfully run the attacks with other slow algorithms like Wordpress, PHPBB3, WPA/WPA2 and so on.

Try to decrease the values for --gpu-loop and --gpu-accel and see if that helps.

[infinity432]

Downclock your cards a bit. Bad mhz/vcore voltage ratio or bad power supply.

I dropped my clocks to stock 850MHz and it looks like it's stable now. Thanks!

[epixoip]

hm, cayman running at 950Mhz... classic asic hang caused by overclocking