Service Enumeration

FTP - 21

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Using hydra

Bruteforcing Credentials

hydra -L usernames.txt -P passwords.txt <IP> ftp

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Telnet - 23

23 - Pentesting Telnet - HackTricksbook.hacktricks.xyz

telnet <IP> <PORT>

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NetBios - 137, 138, 139

137,138,139 - Pentesting NetBios - HackTricksbook.hacktricks.xyz

Ports

Port	Protocol	Service
137	UDP	NetBIOS Name Service (NBNS)
138	UDP	NetBIOS Datagram Service (NDS)
139	TCP	NetBIOS over TCP/IP (NBT)

Using Nbtstat - Windows

Windows Command Line Utility

nbtstat -a 192.168.18.100

Check for local cache

nbtstat -c

Using nmap

nbstat NSE script — Nmap Scripting Engine documentationnmap.org

nmap -sV -v --script nbtstat.nse 192.168.18.110

nmap -sU -p 137 --script nbtstat.nse 192.168.18.110

• -sV - Version Enumeration

• -sU - UDP scan

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SMB - 139, 445

Server Message Block

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PWK Notes: SMB Enumeration Checklist [Updated]0xdf hacks stuff

Methodology

Look out for

• Network File Shares

• Logged in User Details

• Workgroups

• Security Level Information

• Domains and Services

Ports

Port	Protocol	Service
137	UDP	NetBIOS Name Service (NBNS) by SMB
138	UDP	NetBIOS Datagram Service (NDS) by SMB
139	TCP	SMB in conjunction with NetBIOS over TCP/IP (NBT)
445	TCP	Primary Port

Services Examples

• netbios-ssn

• microsoft-ds

Using enum4linux

enum4linux -a 10.10.10.10

Using nmap

To List All Scripts for SMB

To list all scripts by Nmap for SMB enumeration

cd /usr/share/nmap/scripts; ls | grep smb 

OS Discovery

smb-os-discovery NSE script — Nmap Scripting Engine documentationnmap.org

sudo nmap --script smb-os-discovery.nse 192.168.18.110

Enumerating Shares

smb-enum-shares NSE script — Nmap Scripting Engine documentationnmap.org

nmap --script smb-enum-shares.nse -p445 <host>

nmap -sU -p 445 --script=smb-enum-shares <target>

Enumerating Users

smb-enum-users NSE script — Nmap Scripting Engine documentationnmap.org

nmap --script smb-enum-users.nse -p445 <host>

nmap -sU -p 445 --script=smb-enum-users <target>

Enumerating Groups

smb-enum-groups NSE script — Nmap Scripting Engine documentationnmap.org

nmap -sU -p 445 --script=smb-enum-groups <target>

Enumerating Services

smb-enum-services NSE script — Nmap Scripting Engine documentationnmap.org

nmap --script smb-enum-services.nse -p445 <host>

nmap -sU -p 445 --script=smb-enum-services --script-args smbusername=administrator,smbpassword=smbserver_77 <target>

Enumerating Security Level

nmap -sC -sV -A -T4 -p 445 <target> 

Exploitation

Unexpected error with integration github-files: Integration is not installed on this space

Using smbclient

• smbclient -L - List shares on a machine using NULL Session

• smbclient -L <target_IP> -U username%password - List shares on a machine using a valid username + password

• smbclient //<target>/<share$> -U username%password - Connect to a valid share with username + password

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RDP - 3389

3389 - Pentesting RDP - HackTricksbook.hacktricks.xyz

Methodology

1. Check for running services on the target and confirm if RDP is running on any open port.

2. Use Metasploit to confirm the services running is RDP.

3. Use hydra to brute force the login credentials.

4. Use RDP tools to login into the victim's machine.

Using Metasploit

Confirming RDP

msfconsole
> use auxiliary/scanner/rdp/rdp_scanner

Using Hydra

Bruteforcing login credentials

hydra -L usernames.txt -P passwords.txt rdp://<target> -s <port>

Using xfreerdp

Creating RDP session with xfreerdp

xfreerdp /u:administrator /p:qwertyuip /v:IP:PORT

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SNMP - 161, 162, 10161, 10162

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Methodology

1. Look out for default UDP ports used by SNMP: 161, 162, 10161, 10162.

2. Identify the processes running on the target machine using nmap scripts.

3. List valid community strings of the server using nmap scripts.

4. List valid community strings of the server by using snmp_login Metasploit Module.

5. List all the interfaces of the machine. Use appropriate nmap Script.

Using snmp-check

snmp-check <IP>

Using nmap

Identifying Processes

snmp-processes NSE script — Nmap Scripting Engine documentationnmap.org

nmap -sU -p 161 --script=snmp-processes <target>

Identifying Interfaces

snmp-interfaces NSE script — Nmap Scripting Engine documentationnmap.org

nmap -sU -p 161 --script=snmp-interfaces <target>

Using Metasploit

Identifying Valid Community Strings

msfconsole
> use auxiliary/scanner/snmp/snmp_login