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Legacy

Room Legacy
Url https://app.hackthebox.com/machines/Legacy
Sujets Network / Vulnerability assesment
Active/Retired lors de la résolution Retired
Difficulté Easy

Nmap

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PORT    STATE SERVICE     REASON  VERSION
135/tcp open  msrpc       syn-ack Microsoft Windows RPC
139/tcp open  netbios-ssn syn-ack Microsoft Windows netbios-ssn
445/tcp open  �m`U       syn-ack Windows XP microsoft-ds
Service Info: OSs: Windows, Windows XP; CPE: cpe:/o:microsoft:windows, cpe:/o:microsoft:windows_xp

Host script results:
| p2p-conficker: 
|   Checking for Conficker.C or higher...
|   Check 1 (port 40600/tcp): CLEAN (Couldn't connect)
|   Check 2 (port 53966/tcp): CLEAN (Couldn't connect)
|   Check 3 (port 50902/udp): CLEAN (Failed to receive data)
|   Check 4 (port 47445/udp): CLEAN (Failed to receive data)
|_  0/4 checks are positive: Host is CLEAN or ports are blocked
| nbstat: NetBIOS name: LEGACY, NetBIOS user: <unknown>, NetBIOS MAC: 00:50:56:b9:7d:d3 (VMware)
| Names:
|   LEGACY<00>           Flags: <unique><active>
|   HTB<00>              Flags: <group><active>
|   LEGACY<20>           Flags: <unique><active>
|   HTB<1e>              Flags: <group><active>
|   HTB<1d>              Flags: <unique><active>
|   \x01\x02__MSBROWSE__\x02<01>  Flags: <group><active>
| Statistics:
|   00:50:56:b9:7d:d3:00:00:00:00:00:00:00:00:00:00:00
|   00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
|_  00:00:00:00:00:00:00:00:00:00:00:00:00:00
| smb-security-mode: 
|   account_used: <blank>
|   authentication_level: user
|   challenge_response: supported
|_  message_signing: disabled (dangerous, but default)
|_smb2-time: Protocol negotiation failed (SMB2)
|_smb2-security-mode: Couldn't establish a SMBv2 connection.
| smb-os-discovery: 
|   OS: Windows XP (Windows 2000 LAN Manager)
|   OS CPE: cpe:/o:microsoft:windows_xp::-
|   Computer name: legacy
|   NetBIOS computer name: LEGACY\x00
|   Workgroup: HTB\x00
|_  System time: 2023-09-08T22:42:35+03:00
|_clock-skew: mean: 5d00h27m39s, deviation: 2h07m17s, median: 4d22h57m38s

Du windows XP, du service SMB... Est-ce qu'on va vraiment aller chercher très loin ? Je ne pense pas :). Confirmons la présence de la CVE rapidement, pour le beau geste:

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nmap -A --script="*vuln*" -vv 10.10.10.4

PORT    STATE SERVICE      REASON  VERSION
135/tcp open  msrpc        syn-ack Microsoft Windows RPC
139/tcp open  netbios-ssn  syn-ack Microsoft Windows netbios-ssn
445/tcp open  microsoft-ds syn-ack Microsoft Windows XP microsoft-ds
Service Info: OSs: Windows, Windows XP; CPE: cpe:/o:microsoft:windows, cpe:/o:microsoft:windows_xp

Host script results:
| 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://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
|_samba-vuln-cve-2012-1182: NT_STATUS_ACCESS_DENIED
|_smb-vuln-ms10-061: ERROR: Script execution failed (use -d to debug)
|_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://technet.microsoft.com/en-us/library/security/ms08-067.aspx
|_      https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4250

Tiens donc... Il ne reste plus qu'à lancer metasploit (on ne va pas se prendre la tête), avec le module qui va bien: ms08_067_netapi, pour la CVE CVE-2008-4250.

On entre les options adéquates (qui se limitent au RHOST/LHOST...), run, hop on est root.