7MS #474: Password Cracking in the Cloud - Part 3
7 Minute Security30 Kesä 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!

Jaksot(682)

7MS #643: DIY Pentest Dropbox Tips – Part 11

7MS #643: DIY Pentest Dropbox Tips – Part 11

Today we continue where we left off in episode 641, but this time talking about how to automatically deploy and install a Ubuntu-based dropbox!  I also share some love for exegol as an all-in-one Active Directory pentesting platform.

27 Syys 202426min

7MS #642: Interview with Ron Cole of Immersive Labs

7MS #642: Interview with Ron Cole of Immersive Labs

Ron Cole of Immersive Labs joins us to talk pentest war stories, essential skills he learned while serving on a SOC, and the various pentest training and range platforms you can use to sharpen your security skills! Here are the links Ron shared during our discussion: VetSec Fortinet Veterans Program Immersive Labs Cyber Million FedVTE

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7MS #641: DIY Pentest Dropbox Tips – Part 10

7MS #641: DIY Pentest Dropbox Tips – Part 10

Today we’re revisiting the fun world of automating pentest dropboxes using Proxmox, Ansible, Cursor and Level.  Plus, a tease about how all this talk about automation is getting us excited for a long-term project: creating a free/community edition of Light Pentest LITE training!

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7MS #640: Tales of Pentest Pwnage – Part 63

7MS #640: Tales of Pentest Pwnage – Part 63

This was my favorite pentest tale of pwnage to date!  There’s a lot to cover in this episode so I’m going to try and bullet out the TLDR version here: Sprinkled farmer files around the environment Found high-priv boxes with WebClient enabled Added “ghost” machine to the Active Directory (we’ll call it GHOSTY) RBCD attack to be able to impersonate a domain admin using the CIFS/SMB service against the victim system where some higher-priv users were sitting Use net.py to add myself to local admin on the victim host Find a vulnerable service to hijack and have run an evil, TGT-gathering Rubeus.exe – found that Credential Guard was cramping my style! Pulled the TGT from a host not protected with Credential Guard Figured out the stolen user’s account has some “write” privileges to a domain controller Use rbcd.py to delegate from GHOSTY and to the domain controller Request a TGT for GHOSTY Use getST.py to impersonate CIFS using a domain admin account on the domain controller (important thing here was to specify the DC by its FQDN, not just hostname) Final move: use the domain admin ccache file to leverage net.py and add myself to the Active Directory Administrators group

7 Syys 202443min

7MS #639: Tales of Pentest Pwnage - Part 62

7MS #639: Tales of Pentest Pwnage - Part 62

Today’s tale of pentest pwnage talks about the dark powers of the net.py script from impacket.

3 Syys 20247min

7MS #638: Tales of Pentest Pwnage – Part 61

7MS #638: Tales of Pentest Pwnage – Part 61

Today we’re talking pentesting – specifically some mini gems that can help you escalate local/domain/SQL privileges: Check the C: drive! If you get local admin and the system itself looks boring, check root of C – might have some interesting scripts or folders with tools that have creds in them. Also look at Look at Get-ScheduledTasks Find ids and passwords easily in Snaffler output with this Snaffler cleaner script There’s a ton of gold to (potentially) be found in SQL servers – check out my notes on using PowerUpSQL to find misconfigs and agent jobs you might able to abuse!

23 Elo 202432min

7MS #637: BPATTY[RELOADED] Release Party

7MS #637: BPATTY[RELOADED] Release Party

Hello friends, I’m excited to release BPATTY[RELOADED] into the world at https://bpatty.rocks! – which stands for Brian’s Pentesting and Technical Tips for You! It’s a knowledge base of IT and security bits that help me do a better job doing security stuff! Today I do an ACTUAL 7-minute episode (GASP…what a concept!) covering my favorite bits on the site so far. Enjoy!

17 Elo 20247min

7MS #636: A Prelude to BPATTY(RELOADED)

7MS #636: A Prelude to BPATTY(RELOADED)

Artificial hype alert!  I’m working on a NEW version of BPATTY (Brian’s Pentesting and Technical Tips for You), but it is delayed because of a weird domain name hostage negotiation situation.  It’s weird.  But in the meantime I want to talk about the project (which is a pentest documentation library built on Docusaurus) and how I think it will be bigger/better/stronger/faster/cooler than BPATTY v1 (which is now in archive/read-only mode).

12 Elo 202411min

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