Hashcat failed to break 8 character password on NVIDA A100 - what is the reason?

[myg]

Hello!

I tried to crack a 8 character password that contains uppercase and lowercase letters, as well as a number and a * symbol with this command :

hashcat -m 0 -a 3 -O 411CD27141387751E972BF3874AA44BA -a3 ?a?a?a?a?a?a?a?a


But it could not crack and said after 2 days:

Session..........: hashcat
Status...........: Exhausted
Hash.Mode........: 0 (MD5)
Hash.Target......: 411CD27141387751E972BF3874AA44BA
Time.Started.....: Fri Sep 29 10:25:23 2023 (2 days, 22 hours)
Time.Estimated...: Mon Oct 02 09:10:37 2023 (0 secs)
Kernel.Feature...: Optimized Kernel
Guess.Mask.......: ?a?a?a?a?a?a?a?a [8]
Guess.Queue......: 1/1 (100.00%)
Speed.#1.........: 56312.0 MH/s (1.73ms) @ Accel:32 Loops:64 Thr:1024 Vec:1
Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new)
Progress.........: 6634204312890625/6634204312890625 (100.00%)
Rejected.........: 0/6634204312890625 (0.00%)
Restore.Point....: 7737809375/7737809375 (100.00%)
Restore.Sub.#1...: Salt:0 Amplifier:857344-857375 Iteration:0-64
Candidate.Engine.: Device Generator
Candidates.#1....: (}~trt ~ ->  ~? ~}?$
Hardware.Mon.#1..: Temp: 42c Util: 98% Core:1410MHz Mem:1512MHz Bus:16

Started: Fri Sep 29 10:25:21 2023
Stopped: Mon Oct 02 09:10:38 2023

When I used exact mask then it cracked during 1 second.
Thank you for any help.

[marc1n]

Your command line shows an error - you have entered -a3 twice
This is correct : hashcat -m0 -a3 -w4 -O 411CD27141387751E972BF3874AA44BA ?a?a?a?a?a?a?a?a

or fastest

hashcat -m0 -a3 -w4 -O 411CD27141387751E972BF3874AA44BA -1 ?l?u?d* ?1?1?1?1?1?1?1?1

[buka]

The duplicate -a 3 shouldn't matter. What's the password? Does it contain any multi-byte characters?

[myg]

The duplicate -a 3 shouldn't matter. What's the password? Does it contain any multi-byte characters?

BnGra1P*

411CD27141387751E972BF3874AA44BA

[myg]

Your command line shows an error - you have entered -a3 twice
This is correct : hashcat -m0 -a3 -w4 -O 411CD27141387751E972BF3874AA44BA ?a?a?a?a?a?a?a?a

or fastest

hashcat -m0 -a3 -w4 -O 411CD27141387751E972BF3874AA44BA -1 ?l?u?d* ?1?1?1?1?1?1?1?1

Thank you -- 
1) duble a3 does not generate error... I think long time without success originates from another reason...
2)the idea was to check full time to crack with  ?a?a?a?a?a?a?a?a without guess mask

[buka]

BnGra1P*

411CD27141387751E972BF3874AA44BA

That's NTLM (-m 1000) and not MD5 (-m 0), so hashcat having failed is OK.

[myg]

BnGra1P*

411CD27141387751E972BF3874AA44BA

That's NTLM (-m 1000) and not MD5 (-m 0), so hashcat having failed is OK.

Thank you! Cracked in 2 h 21 min

[HectorSchauer]

Nice, it took me 4 hours.

[HectorSchauer]

Anyone able to crack it in less than 2 hours?

[slyexe]

Anyone able to crack it in less than 2 hours?

yup.

Code:

Session..........: hashcat
Status...........: Running
Hash.Mode........: 0 (MD5)
Hash.Target......: 411cd27141387751e972bf3874aa44ba
Time.Started.....: Mon Nov 06 20:51:29 2023 (1 min, 39 secs)
Time.Estimated...: Mon Nov 06 21:44:38 2023 (51 mins, 30 secs)
Kernel.Feature...: Pure Kernel
Guess.Mask.......: ?1?1?1?1?1?1?1?1 [8]
Guess.Charset....: -1 ?l?u?d*, -2 Undefined, -3 Undefined, -4 Undefined
Guess.Queue......: 1/1 (100.00%)
Speed.#1.........: 26036.4 MH/s (6.32ms) @ Accel:256 Loops:128 Thr:64 Vec:1
Speed.#2.........: 25488.7 MH/s (12.78ms) @ Accel:64 Loops:128 Thr:512 Vec:1
Speed.#3.........: 26276.3 MH/s (6.13ms) @ Accel:256 Loops:128 Thr:64 Vec:1
Speed.#*.........: 77799.6 MH/s

Max attack would take 53 minutes.