7MS #420: Tales of Internal Pentest Pwnage - Part 17
7 Minute Security26 Kesä 2020

7MS #420: Tales of Internal Pentest Pwnage - Part 17

Today's episode is a fun tale of pentest pwnage! Interestingly, to me this pentest had a ton of time-sponging issues on the front end, but the TTDA (Time to Domain Admin) was maybe my fastest ever.

I had to actually roll a fresh Kali VM to upload to the customer site, and I learned (the hard way) to make that VM disk as lean as possible. I got away with a 15 gig drive, and the OS+tools+updates took up about 12 gig.

One of the biggest lessons I learned from this experience is to make sure that not only is your Kali box updated before you take it to a customer site (see this script), but you should make sure you install all the tool dependencies beforehand as well (specifically, Eyewitness, Impacket and MITM6).

This pentest was also extremely time-boxed, so I tried to get as much bang out of it as possible. This included:

  • Capturing hashes with Responder
  • Checking for "Kerberoastable" accounts (GetUserSPNs.py -request -dc-ip x.x.x.x domain/user)
  • Check for MS14-025 (see this article)
  • Check for MS17-010 (nmap -Pn -p445 --open --max-hostgroup 3 --script smb-vuln-ms17-010 192.168.0.0/24 -oA vulnerable-2-eblue) and try this method of exploiting it
  • Check for DNS zone transfer (dnsrecon -d name.of.fqdn -t axf)
  • Test for egress filtering of ports 1-1024
  • Took a backup of AD "the Microsoft way" and then cracked with secretsdump:

sudo python ./secretsdump.py -ntds /loot/Active\ Directory/ntds.dit -system /loot/registry/SYSTEM -hashes lmhash:nthash LOCAL -outputfile /loot/ad-pw-dump

Jaksot(689)

7MS #674: Tales of Pentest Pwnage – Part 71

7MS #674: Tales of Pentest Pwnage – Part 71

Today’s tale of pentest pwnage is another great one!  We talk about: The SPNless RBCD attack (covered in more detail in this episode) Importance of looking at all “branches” of outbound permissions that your user has in BloodHound This devilishly effective MSOL-account-stealing PowerShell script (obfuscate it first!) A personal update on my frustration with ringing in my ears

9 Touko 49min

7MS #673: ProxmoxRox

7MS #673: ProxmoxRox

Today we’re excited to release ProxmoxRox – a repo of info and scripts to help you quickly spin up Ubuntu and Windows VMs.  Also, some important news items: 7MinSec.club in-person meeting is happening Wednesday, May 14!  More details here. We did our second Tuesday TOOLSday this week and showed you some local privesc techniques when you have local admin on an endpoint

3 Touko 30min

7MS #672: Tales of Pentest Pwnage – Part 70

7MS #672: Tales of Pentest Pwnage – Part 70

Today’s a fun tale of pentest pwnage where we leveraged a WinRM service ticket in combination with the shadow credentials attack, then connected to an important system using evil-winrm and make our getaway with some privileged Kerberos TGTs!  I also share an (intentionally) vague story about a personal struggle I could use your thoughts/prayers/vibes with.

25 Huhti 55min

7MS #671: Pentesting GOAD

7MS #671: Pentesting GOAD

Hello! This week Joe “The Machine” Skeen and I kicked off a series all about pentesting GOAD (Game of Active Directory).  In part one we covered: Checking for null session enumeration on domain controllers Enumerating systems with and without SMB signing Scraping AD user account descriptions Capturing hashes using Responder Cracking hashes with Hashcat

18 Huhti 25min

7MS #670: Adventures in Self-Hosting Security Services

7MS #670: Adventures in Self-Hosting Security Services

Hi friends, today I’m kicking off a series talking about the good/bad/ugly of hosting security services. Today I talk specifically about transfer.zip. By self-hosting your own instance of transfer.zip, you can send and receive HUGE files that are end-to-end encrypted using WebRTC.  Sweet!  I also supplemented today’s episode with a short live video over at 7MinSec.club.

11 Huhti 36min

7MS #669: What I’m Working on This Week – Part 3

7MS #669: What I’m Working on This Week – Part 3

Hi friends, in this edition of what I’m working on this week: 3 pulse-pounding pentests that had…problems Something I’m calling the unshadow/reshadow credentials attack Heads-up on a new video experiment I’m going to try next week

4 Huhti 42min

7MS #668: Tales of Pentest Pwnage – Part 69

7MS #668: Tales of Pentest Pwnage – Part 69

Hola friends! Today’s tale of pentest pwnage talks about abusing Exchange and the Azure ADSync account! Links to the discussed things: adconnectdump – for all your ADSync account dumping needs! Adam Chester PowerShell script to dump MSOL service account dacledit.py (part of Impacket) to give myself full write privileges on the MSOL sync account: dacledit.py -action ‘write’ -rights ‘FullControl’ -principal lowpriv -target MSOL-SYNC-ACCOUNT -dc-ip 1.2.3.4 domain.com/EXCHANGEBOX$ -k -no-pass Looking to tighten up your Exchange permissions – check out this crazy detailed post

28 Maalis 30min

7MS #667: Pentesting GOAD SCCM - Part 2!

7MS #667: Pentesting GOAD SCCM - Part 2!

Hey friends, our good buddy Joe “The Machine” Skeen and I are back this week with part 2 (check out part 1!) tackling GOAD SCCM again!  Spoiler alert: this time we get DA!  YAY! Definitely check out these handy SCCM resources to help you – whether it be in the lab or IRL (in real life): GOAD SCCM walkthrough MisconfigurationManager – tremendous resource for enumerating/attacking/privesc-ing within SCCM This gist from Adam Chester will help you decrypt SCCM creds stored in SQL

21 Maalis 28min

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