7MS #474: Password Cracking in the Cloud - Part 3
7 Minute Security30 Juni 2021

7MS #474: Password Cracking in the Cloud - Part 3

Hey friends! Today we're dusting off an old mini-series about password cracking in the cloud (check out part 1 and part 2) and sharing some awesome info on building a monster of a cracking rig in AWS!

One reason we haven't talked about password cracking in the cloud in a while is because back in winter of 2019 I built baby's first password cracking. Unfortunately, this week, Hashy (the name I gave to the rig) is overheating, and GPUs are impossible to find, so what's a pentester to do?

Well, in today's episode I talk about this article from Sevnx which walks you through building a virtual password-cracking beast in the cloud. The article (complemented by a sweet video) will get you running in short order.

WARNING: running this instance is super expensive (the author warns the instance would cost ~$9k/month if you left it run continuously).

The steps are pretty straightforward, but between reboots I found that hashcat acted all wonky. Luckily, the article addresses that with this great tip:

Pro tip: Save the Cuda download somewhere. If you ever turn your cracker off and get errors running hashcat when you turn it back on, re-run the install line. We think AWS sometimes refreshes the drivers or something and hashcat doesn't like it very much.

If you need help installing one of my fave tools, hatecrack check out my password cracking in the cloud gist. Also, our buddy Joe pointed me towards a utility called duplicut to help de-dupe large password-cracking wordlists.

Once the AWS instance is setup, what kind of stats do we get out of this demon? Here's the result of hashcat -b:

Hashmode: 0 - MD5 Speed.#1.........: 55936.1 MH/s (47.79ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#2.........: 55771.4 MH/s (47.94ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#3.........: 55827.0 MH/s (47.88ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#4.........: 55957.7 MH/s (47.78ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#*.........: 223.5 GH/s Hashmode: 100 - SHA1 Speed.#1.........: 17830.1 MH/s (75.08ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1 Speed.#2.........: 17774.0 MH/s (75.21ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1 Speed.#3.........: 17780.9 MH/s (75.26ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1 Speed.#4.........: 17795.6 MH/s (75.22ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1 Speed.#*.........: 71180.6 MH/s Hashmode: 1400 - SHA2-256 Speed.#1.........: 7709.9 MH/s (86.84ms) @ Accel:8 Loops:1024 Thr:1024 Vec:1 Speed.#2.........: 7718.3 MH/s (86.75ms) @ Accel:8 Loops:1024 Thr:1024 Vec:1 Speed.#3.........: 7710.4 MH/s (86.75ms) @ Accel:8 Loops:1024 Thr:1024 Vec:1 Speed.#4.........: 7694.4 MH/s (87.02ms) @ Accel:8 Loops:1024 Thr:1024 Vec:1 Speed.#*.........: 30833.0 MH/s Hashmode: 1700 - SHA2-512 Speed.#1.........: 2399.8 MH/s (69.70ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#2.........: 2401.1 MH/s (69.68ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#3.........: 2397.3 MH/s (69.78ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#4.........: 2400.3 MH/s (69.70ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#*.........: 9598.5 MH/s Hashmode: 22000 - WPA-PBKDF2-PMKID+EAPOL (Iterations: 4095) Speed.#1.........: 866.5 kH/s (94.23ms) @ Accel:16 Loops:256 Thr:1024 Vec:1 Speed.#2.........: 866.7 kH/s (94.21ms) @ Accel:16 Loops:256 Thr:1024 Vec:1 Speed.#3.........: 865.6 kH/s (94.30ms) @ Accel:16 Loops:256 Thr:1024 Vec:1 Speed.#4.........: 866.7 kH/s (94.20ms) @ Accel:16 Loops:256 Thr:1024 Vec:1 Speed.#*.........: 3465.5 kH/s Hashmode: 1000 - NTLM Speed.#1.........: 102.2 GH/s (26.05ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#2.........: 102.3 GH/s (26.05ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#3.........: 102.2 GH/s (26.07ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#4.........: 102.3 GH/s (26.04ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8 Speed.#*.........: 409.0 GH/s Hashmode: 3000 - LM Speed.#1.........: 41104.7 MH/s (64.74ms) @ Accel:512 Loops:1024 Thr:64 Vec:1 Speed.#2.........: 40216.5 MH/s (66.11ms) @ Accel:512 Loops:1024 Thr:64 Vec:1 Speed.#3.........: 40507.3 MH/s (65.89ms) @ Accel:512 Loops:1024 Thr:64 Vec:1 Speed.#4.........: 39181.4 MH/s (68.13ms) @ Accel:512 Loops:1024 Thr:64 Vec:1 Speed.#*.........: 161.0 GH/s Hashmode: 5500 - NetNTLMv1 / NetNTLMv1+ESS Speed.#1.........: 55861.0 MH/s (47.87ms) @ Accel:32 Loops:1024 Thr:1024 Vec:2 Speed.#2.........: 55864.3 MH/s (47.87ms) @ Accel:32 Loops:1024 Thr:1024 Vec:2 Speed.#3.........: 55519.4 MH/s (47.98ms) @ Accel:32 Loops:1024 Thr:1024 Vec:2 Speed.#4.........: 55826.6 MH/s (47.89ms) @ Accel:32 Loops:1024 Thr:1024 Vec:2 Speed.#*.........: 223.1 GH/s Hashmode: 5600 - NetNTLMv2 Speed.#1.........: 3968.0 MH/s (84.37ms) @ Accel:4 Loops:1024 Thr:1024 Vec:1 Speed.#2.........: 3968.1 MH/s (84.38ms) @ Accel:4 Loops:1024 Thr:1024 Vec:1 Speed.#3.........: 3965.6 MH/s (84.38ms) @ Accel:4 Loops:1024 Thr:1024 Vec:1 Speed.#4.........: 3967.8 MH/s (84.37ms) @ Accel:4 Loops:1024 Thr:1024 Vec:1 Speed.#*.........: 15869.5 MH/s Hashmode: 1500 - descrypt, DES (Unix), Traditional DES Speed.#1.........: 1752.8 MH/s (95.32ms) @ Accel:32 Loops:1024 Thr:64 Vec:1 Speed.#2.........: 1729.3 MH/s (96.65ms) @ Accel:32 Loops:1024 Thr:64 Vec:1 Speed.#3.........: 1749.5 MH/s (95.53ms) @ Accel:32 Loops:1024 Thr:64 Vec:1 Speed.#4.........: 1740.6 MH/s (96.01ms) @ Accel:32 Loops:1024 Thr:64 Vec:1 Speed.#*.........: 6972.3 MH/s Hashmode: 500 - md5crypt, MD5 (Unix), Cisco-IOS $1$ (MD5) (Iterations: 1000) Speed.#1.........: 24882.8 kH/s (50.59ms) @ Accel:16 Loops:1000 Thr:1024 Vec:1 Speed.#2.........: 24828.0 kH/s (50.60ms) @ Accel:16 Loops:1000 Thr:1024 Vec:1 Speed.#3.........: 24865.7 kH/s (50.60ms) @ Accel:16 Loops:1000 Thr:1024 Vec:1 Speed.#4.........: 24849.6 kH/s (50.59ms) @ Accel:16 Loops:1000 Thr:1024 Vec:1 Speed.#*.........: 99426.0 kH/s Hashmode: 3200 - bcrypt $2*$, Blowfish (Unix) (Iterations: 32) Speed.#1.........: 69071 H/s (54.00ms) @ Accel:4 Loops:16 Thr:24 Vec:1 Speed.#2.........: 68818 H/s (54.25ms) @ Accel:4 Loops:16 Thr:24 Vec:1 Speed.#3.........: 68926 H/s (54.13ms) @ Accel:4 Loops:16 Thr:24 Vec:1 Speed.#4.........: 69013 H/s (54.04ms) @ Accel:4 Loops:16 Thr:24 Vec:1 Speed.#*.........: 275.8 kH/s Hashmode: 1800 - sha512crypt $6$, SHA512 (Unix) (Iterations: 5000) Speed.#1.........: 386.4 kH/s (84.04ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#2.........: 377.9 kH/s (85.68ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#3.........: 372.3 kH/s (86.76ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#4.........: 382.7 kH/s (84.51ms) @ Accel:8 Loops:256 Thr:1024 Vec:1 Speed.#*.........: 1519.3 kH/s Hashmode: 7500 - Kerberos 5, etype 23, AS-REQ Pre-Auth Speed.#1.........: 1177.0 MH/s (71.08ms) @ Accel:256 Loops:128 Thr:32 Vec:1 Speed.#2.........: 1175.4 MH/s (71.17ms) @ Accel:256 Loops:128 Thr:32 Vec:1 Speed.#3.........: 1171.5 MH/s (71.28ms) @ Accel:256 Loops:128 Thr:32 Vec:1 Speed.#4.........: 1177.4 MH/s (71.05ms) @ Accel:256 Loops:128 Thr:32 Vec:1 Speed.#*.........: 4701.3 MH/s Hashmode: 13100 - Kerberos 5, etype 23, TGS-REP Speed.#1.........: 1068.5 MH/s (78.29ms) @ Accel:32 Loops:1024 Thr:32 Vec:1 Speed.#2.........: 1069.4 MH/s (78.25ms) @ Accel:32 Loops:1024 Thr:32 Vec:1 Speed.#3.........: 1068.4 MH/s (78.32ms) @ Accel:32 Loops:1024 Thr:32 Vec:1 Speed.#4.........: 1068.6 MH/s (78.29ms) @ Accel:32 Loops:1024 Thr:32 Vec:1 Speed.#*.........: 4275.0 MH/s Hashmode: 15300 - DPAPI masterkey file v1 (Iterations: 23999) Speed.#1.........: 148.5 kH/s (93.95ms) @ Accel:8 Loops:512 Thr:1024 Vec:1 Speed.#2.........: 148.4 kH/s (93.99ms) @ Accel:8 Loops:512 Thr:1024 Vec:1 Speed.#3.........: 148.5 kH/s (93.96ms) @ Accel:8 Loops:512 Thr:1024 Vec:1 Speed.#4.........: 148.4 kH/s (93.95ms) @ Accel:8 Loops:512 Thr:1024 Vec:1 Speed.#*.........: 593.8 kH/s Hashmode: 15900 - DPAPI masterkey file v2 (Iterations: 12899) Speed.#1.........: 80610 H/s (80.47ms) @ Accel:4 Loops:256 Thr:1024 Vec:1 Speed.#2.........: 80606 H/s (80.47ms) @ Accel:4 Loops:256 Thr:1024 Vec:1 Speed.#3.........: 80596 H/s (80.48ms) @ Accel:4 Loops:256 Thr:1024 Vec:1 Speed.#4.........: 80378 H/s (80.46ms) @ Accel:4 Loops:256 Thr:1024 Vec:1 Speed.#*.........: 322.2 kH/s Hashmode: 7100 - macOS v10.8+ (PBKDF2-SHA512) (Iterations: 1023) Speed.#1.........: 1002.4 kH/s (78.60ms) @ Accel:32 Loops:31 Thr:1024 Vec:1 Speed.#2.........: 1002.4 kH/s (78.60ms) @ Accel:32 Loops:31 Thr:1024 Vec:1 Speed.#3.........: 1002.1 kH/s (78.62ms) @ Accel:32 Loops:31 Thr:1024 Vec:1 Speed.#4.........: 1002.7 kH/s (78.58ms) @ Accel:32 Loops:31 Thr:1024 Vec:1 Speed.#*.........: 4009.6 kH/s Hashmode: 11600 - 7-Zip (Iterations: 16384) Speed.#1.........: 897.6 kH/s (82.05ms) @ Accel:4 Loops:4096 Thr:1024 Vec:1 Speed.#2.........: 896.4 kH/s (82.09ms) @ Accel:4 Loops:4096 Thr:1024 Vec:1 Speed.#3.........: 893.3 kH/s (83.60ms) @ Accel:4 Loops:4096 Thr:1024 Vec:1 Speed.#4.........: 912.4 kH/s (81.95ms) @ Accel:4 Loops:4096 Thr:1024 Vec:1 Speed.#*.........: 3599.7 kH/s Hashmode: 12500 - RAR3-hp (Iterations: 262144) Speed.#1.........: 116.6 kH/s (60.91ms) @ Accel:16 Loops:16384 Thr:128 Vec:1 Speed.#2.........: 111.4 kH/s (63.61ms) @ Accel:16 Loops:16384 Thr:128 Vec:1 Speed.#3.........: 111.6 kH/s (63.63ms) @ Accel:16 Loops:16384 Thr:128 Vec:1 Speed.#4.........: 115.0 kH/s (61.81ms) @ Accel:16 Loops:16384 Thr:128 Vec:1 Speed.#*.........: 454.7 kH/s Hashmode: 13000 - RAR5 (Iterations: 32799) Speed.#1.........: 93248 H/s (54.69ms) @ Accel:16 Loops:128 Thr:1024 Vec:1 Speed.#2.........: 93202 H/s (54.72ms) @ Accel:16 Loops:128 Thr:1024 Vec:1 Speed.#3.........: 93009 H/s (54.70ms) @ Accel:16 Loops:128 Thr:1024 Vec:1 Speed.#4.........: 93241 H/s (54.69ms) @ Accel:16 Loops:128 Thr:1024 Vec:1 Speed.#*.........: 372.7 kH/s Hashmode: 6211 - TrueCrypt RIPEMD160 + XTS 512 bit (Iterations: 1999) Speed.#1.........: 672.2 kH/s (55.34ms) @ Accel:16 Loops:64 Thr:1024 Vec:1 Speed.#2.........: 672.1 kH/s (55.34ms) @ Accel:16 Loops:64 Thr:1024 Vec:1 Speed.#3.........: 671.4 kH/s (55.34ms) @ Accel:16 Loops:64 Thr:1024 Vec:1 Speed.#4.........: 672.2 kH/s (55.34ms) @ Accel:16 Loops:64 Thr:1024 Vec:1 Speed.#*.........: 2687.9 kH/s Hashmode: 13400 - KeePass 1 (AES/Twofish) and KeePass 2 (AES) (Iterations: 24569) Speed.#1.........: 111.2 kH/s (122.52ms) @ Accel:32 Loops:128 Thr:1024 Vec:1 Speed.#2.........: 111.1 kH/s (122.55ms) @ Accel:32 Loops:128 Thr:1024 Vec:1 Speed.#3.........: 111.2 kH/s (122.58ms) @ Accel:32 Loops:128 Thr:1024 Vec:1 Speed.#4.........: 111.2 kH/s (122.52ms) @ Accel:32 Loops:128 Thr:1024 Vec:1 Speed.#*.........: 444.7 kH/s Hashmode: 6800 - LastPass + LastPass sniffed (Iterations: 499) Speed.#1.........: 5944.3 kH/s (35.66ms) @ Accel:8 Loops:249 Thr:1024 Vec:1 Speed.#2.........: 5942.0 kH/s (35.66ms) @ Accel:8 Loops:249 Thr:1024 Vec:1 Speed.#3.........: 5939.0 kH/s (35.67ms) @ Accel:8 Loops:249 Thr:1024 Vec:1 Speed.#4.........: 5943.8 kH/s (35.66ms) @ Accel:8 Loops:249 Thr:1024 Vec:1 Speed.#*.........: 23769.0 kH/s Hashmode: 11300 - Bitcoin/Litecoin wallet.dat (Iterations: 200459) Speed.#1.........: 11370 H/s (73.48ms) @ Accel:2 Loops:1024 Thr:1024 Vec:1 Speed.#2.........: 11355 H/s (73.50ms) @ Accel:2 Loops:1024 Thr:1024 Vec:1 Speed.#3.........: 11369 H/s (73.49ms) @ Accel:2 Loops:1024 Thr:1024 Vec:1 Speed.#4.........: 11370 H/s (73.49ms) @ Accel:2 Loops:1024 Thr:1024 Vec:1 Speed.#*.........: 45464 H/s

For a real world example, I had ~1,500 NTLM hashes to crack that I ran through some of the hatecrack methodology, and here's how the instance performed:

  • 100 LM hashes discovered, all cracked in 7 minutes (heh, 7 minutes :-)
  • Ran hatecrack's quick crackw ith no rules: done in 7 minutes, cracked 108 accounts
  • Quick crack against one rule to rule them all: ran in 25 minutes, got got 271 new passwords
  • Ran extensive hatecrack methodology, it ran for a little over 2 hours and got 88 new passwords.

All said and done, about 1/3 of the passwords cracked in about 3 hours. Not bad!

Don't forget, the second you're done with your cracking efforts, SHUT THE BOX DOWN! Otherwise you're in for a sour surprise come AWS billing day :-(

On a few personal notes:

  • Last Comic Standing was the show I couldn't think of during the episode :-)

  • After a toxic non-toxic foam pit incident a few years ago, my family and I had another injury this weekend with a rented waterslide - the fun ended in a concussion!

Avsnitt(709)

7MS #709: Second Impressions of Twingate

7MS #709: Second Impressions of Twingate

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7MS #708: Tales of Pentest Fail – Part 6

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7MS #707: Our New Pentest Course Has Launched!

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7MS #706: Tales of Pentest Pwnage – Part 80

7MS #706: Tales of Pentest Pwnage – Part 80

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7MS #705: A Phishing Campaign Fail Tale

7MS #705: A Phishing Campaign Fail Tale

This might be obvious, but security is not all domain admin dancing and maximum pwnage. Sometimes, despite my best efforts, a security project does a faceplant. Today's episode focuses on a phishing campaign that had plenty of "bites" but got immediately shut down – for reasons I still don't understand.

12 Dec 202521min

7MS #704: DIY Pentest Dropbox Tips – Part 12

7MS #704: DIY Pentest Dropbox Tips – Part 12

Hola friends!  My week has very much been about trying to turnaround pentest dropboxes as quickly as possible.  In that adventure, I came across two time-saving discoveries: Using a Proxmox LXC as a persistent remote access method Writing a Proxmox post-deployment script that installs Splashtop on the Windows VM, and resets the admin passwords on both VMs, all from the Proxmox SSH console without touching the console on either VM If you feel some of this is better seen than said, on this week's 7MinSec.club Tuesday TOOLSday broadcast we show this in more detail.

5 Dec 202524min

7MS #703: Tales of Pentest Pwnage – Part 79

7MS #703: Tales of Pentest Pwnage – Part 79

Happy Thanksgiving week friends! Today we're celebrating a turkey and pie overload by sharing another fun tale of pentest pwnage! It involves using pygpoabuse to hijack a GPO and turn it into our pentesting puppet!  Muahahahahaah!!!!  Also: This week over at 7MinSec.club we looked at how to defend against some common SQL attacks We're very close to offering our brand new LPLITE:GOAD 3-day pentest course (likely in mid-January). It will get announced on 7MinSec.club first, so please make sure you're subscribed there (it's free!) Did you miss our talk called Should You Hire AI Run Your Next Pentest?  Check it out on YouTube!

28 Nov 202522min

7MS #702: Should You Hire AI to Run Your Next Pentest?

7MS #702: Should You Hire AI to Run Your Next Pentest?

Hello friends, in today's episode I give an audio summary of a talk I gave this week at the MN GOVIT Symposium called "Should You Hire AI to Run Your Next Pentest?"  It's not a pro-AI celebration, nor is it an anti-AI bashing.  Rather, the talk focuses on my experiences using both free and paid AI services to guide me through an Active Directory penetration test.

21 Nov 202521min

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