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Hashcat slows down after starting attack

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Hashcat slows down after starting attack
kenuser Offline
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#1
11-20-2024, 11:43 AM (This post was last modified: 11-20-2024, 11:55 AM by kenuser.)
Hi,

I'm search why hashcat slows down after staring attack, but I cannot find the solution on the forum. 
Mode -22000, it starts with normal speed 652.3 kH/s but after some seconds speed goes down and stabilize to about 400.0 kH/s.
Can someone tell me why?
Thank you


Code:
CUDA API (CUDA 12.7) ==================== * Device #1: NVIDIA GeForce GTX 1080 Ti, 10202/11263 MB, 28MCU OpenCL API (OpenCL 3.0 CUDA 12.7.29) - Platform #1 [NVIDIA Corporation] ======================================================================= * Device #2: NVIDIA GeForce GTX 1080 Ti, skipped OpenCL API (OpenCL 3.0 WINDOWS) - Platform #2 [Intel(R) Corporation] ==================================================================== * Device #3: Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz, skipped Minimum password length supported by kernel: 8 Maximum password length supported by kernel: 63 Hashes: 1 digests; 1 unique digests, 1 unique salts Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates Optimizers applied: * Zero-Byte * Single-Hash * Single-Salt * Brute-Force * Slow-Hash-SIMD-LOOP Watchdog: Temperature abort trigger set to 85c Host memory required for this attack: 872 MB [s]tatus [p]ause [b]ypass [c]heckpoint [f]inish [q]uit => Session..........: 2024-11-20 Status...........: Running Hash.Mode........: 22000 (WPA-PBKDF2-PMKID+EAPOL) Hash.Target......: E:\hashcat\pmkid_test.22000 Time.Started.....: Wed Nov 20 09:56:59 2024 (1 sec) Time.Estimated...: Wed Nov 20 14:12:29 2024 (4 hours, 15 mins) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1?1?1?1 [10] Guess.Charset....: -1 ?d, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/1 (100.00%) Speed.#1.........:  652.3 kH/s (85.32ms) @ Accel:16 Loops:1024 Thr:512 Vec:1 Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 229376/10000000000 (0.00%) Rejected.........: 0/229376 (0.00%) Restore.Point....: 229376/10000000000 (0.00%) Restore.Sub.#1...: Salt:0 Amplifier:0-1 Iteration:0-1 Candidate.Engine.: Host Generator + PCIe Candidates.#1....: 1234567899 -> 4664252345 Hardware.Mon.#1..: Temp: 59c Fan: 56% Util: 99% Core:1860MHz Mem:5200MHz Bus:16 [s]tatus [p]ause [b]ypass [c]heckpoint [f]inish [q]uit => Session..........: 2024-11-20 Status...........: Running Hash.Mode........: 22000 (WPA-PBKDF2-PMKID+EAPOL) Hash.Target......: E:\hashcat\pmkid_test.22000 Time.Started.....: Wed Nov 20 09:56:59 2024 (5 secs) Time.Estimated...: Wed Nov 20 16:07:45 2024 (6 hours, 10 mins) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1?1?1?1 [10] Guess.Charset....: -1 ?d, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/1 (100.00%) Speed.#1.........:  449.5 kH/s (86.02ms) @ Accel:16 Loops:1024 Thr:512 Vec:1 Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 1605632/10000000000 (0.02%) Rejected.........: 0/1605632 (0.00%) Restore.Point....: 1605632/10000000000 (0.02%) Restore.Sub.#1...: Salt:0 Amplifier:0-1 Iteration:3072-4095 Candidate.Engine.: Host Generator + PCIe Candidates.#1....: 2154530000 -> 8803471234 Hardware.Mon.#1..: Temp: 58c Fan: 55% Util: 70% Core:1860MHz Mem:5200MHz Bus:16 [s]tatus [p]ause [b]ypass [c]heckpoint [f]inish [q]uit => Session..........: 2024-11-20 Status...........: Running Hash.Mode........: 22000 (WPA-PBKDF2-PMKID+EAPOL) Hash.Target......: E:\hashcat\pmkid_test.22000 Time.Started.....: Wed Nov 20 09:56:59 2024 (10 secs) Time.Estimated...: Wed Nov 20 16:28:21 2024 (6 hours, 31 mins) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1?1?1?1 [10] Guess.Charset....: -1 ?d, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/1 (100.00%) Speed.#1.........:  425.9 kH/s (86.10ms) @ Accel:16 Loops:1024 Thr:512 Vec:1 Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 4128768/10000000000 (0.04%) Rejected.........: 0/4128768 (0.00%) Restore.Point....: 4128768/10000000000 (0.04%) Restore.Sub.#1...: Salt:0 Amplifier:0-1 Iteration:0-1 Candidate.Engine.: Host Generator + PCIe Candidates.#1....: 2983741234 -> 8198990000 Hardware.Mon.#1..: Temp: 59c Fan: 55% Util:100% Core:1860MHz Mem:5200MHz Bus:16
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penguinkeeper Offline
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Posts: 234
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Joined: Apr 2021
#2
11-20-2024, 01:20 PM
Yeah, speed works on a rolling average, which kinda fails so shortly after being launched, when it has hardly any data to work with. 426Kh/s is a reasonable speed for your attack
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174region174 Offline
Junior Member
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Posts: 35
Threads: 4
Joined: Dec 2022
#3
11-28-2024, 07:54 PM
(11-20-2024, 11:43 AM)kenuser Wrote: Hi,

I'm search why hashcat slows down after staring attack, but I cannot find the solution on the forum. 
Mode -22000, it starts with normal speed 652.3 kH/s but after some seconds speed goes down and stabilize to about 400.0 kH/s.
Can someone tell me why?
Thank you


Code:
CUDA API (CUDA 12.7) ==================== * Device #1: NVIDIA GeForce GTX 1080 Ti, 10202/11263 MB, 28MCU OpenCL API (OpenCL 3.0 CUDA 12.7.29) - Platform #1 [NVIDIA Corporation] ======================================================================= * Device #2: NVIDIA GeForce GTX 1080 Ti, skipped OpenCL API (OpenCL 3.0 WINDOWS) - Platform #2 [Intel(R) Corporation] ==================================================================== * Device #3: Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz, skipped Minimum password length supported by kernel: 8 Maximum password length supported by kernel: 63 Hashes: 1 digests; 1 unique digests, 1 unique salts Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates Optimizers applied: * Zero-Byte * Single-Hash * Single-Salt * Brute-Force * Slow-Hash-SIMD-LOOP Watchdog: Temperature abort trigger set to 85c Host memory required for this attack: 872 MB [s]tatus [p]ause [b]ypass [c]heckpoint [f]inish [q]uit => Session..........: 2024-11-20 Status...........: Running Hash.Mode........: 22000 (WPA-PBKDF2-PMKID+EAPOL) Hash.Target......: E:\hashcat\pmkid_test.22000 Time.Started.....: Wed Nov 20 09:56:59 2024 (1 sec) Time.Estimated...: Wed Nov 20 14:12:29 2024 (4 hours, 15 mins) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1?1?1?1 [10] Guess.Charset....: -1 ?d, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/1 (100.00%) Speed.#1.........:  652.3 kH/s (85.32ms) @ Accel:16 Loops:1024 Thr:512 Vec:1 Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 229376/10000000000 (0.00%) Rejected.........: 0/229376 (0.00%) Restore.Point....: 229376/10000000000 (0.00%) Restore.Sub.#1...: Salt:0 Amplifier:0-1 Iteration:0-1 Candidate.Engine.: Host Generator + PCIe Candidates.#1....: 1234567899 -> 4664252345 Hardware.Mon.#1..: Temp: 59c Fan: 56% Util: 99% Core:1860MHz Mem:5200MHz Bus:16 [s]tatus [p]ause [b]ypass [c]heckpoint [f]inish [q]uit => Session..........: 2024-11-20 Status...........: Running Hash.Mode........: 22000 (WPA-PBKDF2-PMKID+EAPOL) Hash.Target......: E:\hashcat\pmkid_test.22000 Time.Started.....: Wed Nov 20 09:56:59 2024 (5 secs) Time.Estimated...: Wed Nov 20 16:07:45 2024 (6 hours, 10 mins) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1?1?1?1 [10] Guess.Charset....: -1 ?d, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/1 (100.00%) Speed.#1.........:  449.5 kH/s (86.02ms) @ Accel:16 Loops:1024 Thr:512 Vec:1 Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 1605632/10000000000 (0.02%) Rejected.........: 0/1605632 (0.00%) Restore.Point....: 1605632/10000000000 (0.02%) Restore.Sub.#1...: Salt:0 Amplifier:0-1 Iteration:3072-4095 Candidate.Engine.: Host Generator + PCIe Candidates.#1....: 2154530000 -> 8803471234 Hardware.Mon.#1..: Temp: 58c Fan: 55% Util: 70% Core:1860MHz Mem:5200MHz Bus:16 [s]tatus [p]ause [b]ypass [c]heckpoint [f]inish [q]uit => Session..........: 2024-11-20 Status...........: Running Hash.Mode........: 22000 (WPA-PBKDF2-PMKID+EAPOL) Hash.Target......: E:\hashcat\pmkid_test.22000 Time.Started.....: Wed Nov 20 09:56:59 2024 (10 secs) Time.Estimated...: Wed Nov 20 16:28:21 2024 (6 hours, 31 mins) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1?1?1?1 [10] Guess.Charset....: -1 ?d, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/1 (100.00%) Speed.#1.........:  425.9 kH/s (86.10ms) @ Accel:16 Loops:1024 Thr:512 Vec:1 Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 4128768/10000000000 (0.04%) Rejected.........: 0/4128768 (0.00%) Restore.Point....: 4128768/10000000000 (0.04%) Restore.Sub.#1...: Salt:0 Amplifier:0-1 Iteration:0-1 Candidate.Engine.: Host Generator + PCIe Candidates.#1....: 2983741234 -> 8198990000 Hardware.Mon.#1..: Temp: 59c Fan: 55% Util:100% Core:1860MHz Mem:5200MHz Bus:16

Remove the -S option from your command line at startup. I see that you have it present. In a wpa attack, this option is only needed when working with applying rules to a dictionary.
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