Hi dear reader, there are very few technical network security assessment checklist. So I thought to share my own on this. Have a look and enjoy. Lets talk about the scope first. If you are given a 1000 machines to perform VAPT, then here is your scope. Single machine can have 65535 ports open. Any single port can deploy any service software from the world. For example FTP can be run on smartftp, pureftpd etc.. Any single FTP software version (for example pureftpd 1.0.22) can have number of vulnerabilities available. So if you multiply all of these, then it is impossible for any auditor to go ahead and probe all ports manually and find services manually. Even if he/she is able to do it, it is impossible to check all vulnerabilities that are pertaining to a single port of a single machine. Hence we have to rely on scanners such as nexpose, nessus, openvas, coreimpact etc. Here are some quick tools and test cases that one can perform on commonly found ports in the network pentest.
Identify live hosts
o Ping o Hping o Nmap
Identify OS type
o Nmap o Xprobe2 o Banner grabbing using telnet, nc (netcat)
Port scan
Nmap full SYN scan with verbose mode and service detection and disabling ping scan. Export normal and greppable output for future use.
nmap -Pn -p- -sV X.X.X.X -v -sS -oG nmap_grepable_SYN -oN nmap_normal_SYN
Nmap top 1000 UDP scan with verbose mode and service detection and disabling ping scan. Export normal and greppable output for future use.
nmap -Pn -top-ports=1000 -sV X.X.X.X -v -sS -oG nmap_grepable_UDP -oN nmap_normal_UDP
VA (Vulnerability Assessment)
Use nessus with below profile
DoS disabled
Web scan enabled
SSL scan on every ports instead of known ports
Enable TCP and UDP scan
Only give open ports’ list in the configuration that were found by nmap including TCP and UDP rather than full ports in order to save time particularly number of IPs are more and less time for audit and report.
o Use Nexpose o Use OpenVAS o Use nmap scanner on specific open ports using below command.
For example port 22 (SSH) is open and you want to run all scripts pertaining to SSH then use below command:
Nmap -Pn -sS -p22 --script ssh* -v In case if you are not sure about exact script name you can use * in order to run all scripts that starts with the ‘ssh’ keyword.
Audit SSL
Use openssl, sslyze tools to find below issues within SSL.
Self-signed certificate
SSL version 2 and 3 detection
Weak hashing algorithm
Use of RC4 and CBC ciphers
Logjam issue
Sweet32 issue
Certificate expiry
Openssl ChangeCipherSec issue
POODLE vulnerability
Openssl heartbleed issue
· Check for default passwords in server/device/service documentation o Lets say during your port scan or VA you found some services running on the server for example: cisco, brocad fabric OS, sonicwall firewall, apache tomcat manager. Then for these services Google what are the default configuration administrative username and password. Try those in your login and check your luck. · Hunting some common ports o DNS (53) UDP
Examine domain name system (DNS) using dnsenum, nslookup, dig and fierce tool
Check for zone transfer
Bruteforce subdomain using fierce tool
Run all nmap scripts using following command: nmap -Pn -sU -p53 --script dns* -v
Banner grabbing and finding publicly known exploits
Check for DNS amplification attack
o SMTP (25) TCP
Check for SMTP open relay
Check for email spoofing
Check for username enumeration using VRFY command
Banner grabbing and finding publicly known exploits
Send modified cryptors and check if SMTP gateway is enable to detect and block it?
Run all nmap script using following command: nmap -Pn -sS -p25 --script smtp* -v
o SNMP (161) UDP
Check for default community strings ‘public’ & ‘private’ using snmpwalk and snmpenum.pl script.
Banner grabbing and finding publicly known exploits
Perform MIG enumeration.
· .1.3.6.1.2.1.1.5 Hostnames · .1.3.6.1.4.1.77.1.4.2 Domain Name · .1.3.6.1.4.1.77.1.2.25 Usernames · .1.3.6.1.4.1.77.1.2.3.1.1 Running Services · .1.3.6.1.4.1.77.1.2.27 Share Information o SSH (22) TCP
Banner grabbing and finding publicly known exploits
Check if that supports sshv1 or not.
Bruteforce password using hydra and medusa
Check if it supports weak CBC ciphers and hmac algorithms using ssh2-enum-algos.nse nmap script.
Run all nmap scripts using following command: nmap -Pn -sS -p22 --script ssh* -v
o Cisco VPN (500) UDP
Check for aggressive and main mode enable using ikescan tool.
Enumeration using ikeprobe tool
Check for VPN group and try to crack PSK in order to get credentials to login into the VPN service through web panel.
o SMB (445,137,139) TCP
Check SAMBA service using metasploit use auxiliary/scanner/smb/smb_version
Get reverse shell using meterpreter reverse tcp module.
Check for SMB related vulnerability using ‘smb-check-vulns’ nmap script.
Reference: https://myexploit.wordpress.com/control-smb-445-137-139/
o FTP (21) TCP
Run all nmap script using following command: nmap -Pn -sS -p21 --script ftp* -v
Check for cleartext password submission for ftp login
Check for anonymous access using username and password as anonymous:anonymous
Banner grabbing and finding publicly known exploits
Bruteforce FTP password using hydra and medusa
o Telnet (23) TCP
Banner grabbing and finding publicly known exploits
Bruteforce telnet password
Run following nmap scripts
· telnet-brute.nse · telnet-encryption.nse · telnet-ntlm-info.nse o TFTP (69) UDP
TFTP Enumeration
· tftp ip_address PUT local_file · tftp ip_address GET conf.txt (or other files) · tftp – i GET /etc/passwd (old Solaris)
Bruteforce TFTP using TFTP bruteforcer tool
Run tftp-enum.nse nmap script
Banner grabbing and finding publicly known exploits
o RPC (111) TCP/UDP
Banner grabbing and finding publicly known exploits
Run following nmap scripts
· bitcoinrpc-info.nse · metasploit-msgrpc-brute.nse · metasploit-xmlrpc-brute.nse · msrpc-enum.nse · nessus-xmlrpc-brute.nse · rpcap-brute.nse · rpcap-info.nse · rpc-grind.nse · rpcinfo.nse · xmlrpc-methods.nse
Perform RPC enumeration using rcpinfo tool
Check for the NFS folders so that data could be exported using showmount -e command.
o NTP (123) UDP
Perform NTP enumeration using below commands:
· ntpdc -c monlist IP_ADDRESS · ntpdc -c sysinfo IP_ADDRESS
Run all nmap scripts using nmap -Pn -sS -p21 --script ntp* -v
o HTTP/HTTPs (443,80,8080,8443) TCP
Banner grabbing using burp response
Run Nikto and dirb
Run all nmap scripts using following command nmap -Pn -sS -p21 --script http* -v
Banner grabbing and finding publicly known exploits
o SQL Server (1433,1434, 3306) TCP
Banner grabbing and finding publicly known exploits
Bruteforce and perform other operation using following tools:
· Piggy · SQLping · SQLpoke · SQLrecon · SQLver
Run following nmap scripts:
· ms-sql-brute.nse · ms-sql-config.nse · ms-sql-dac.nse · ms-sql-dump-hashes.nse · ms-sql-empty-password.nse · ms-sql-hasdbaccess.nse · ms-sql-info.nse · ms-sql-ntlm-info.nse · ms-sql-query.nse · ms-sql-tables.nse · ms-sql-xp-cmdshell.nse · pgsql-brute.nse
For MYSQL default username is root and password is
o Oracle (1521) TCP
Enumeration using following tools
· Tnsver [host] [port] · Tnscmd o perl tnscmd.pl -h ip_address o perl tnscmd.pl version -h ip_address o perl tnscmd.pl status -h ip_address
Enumeration & Bruteforce using below nmap scripts:
· oracle-brute.nse · oracle-brute-stealth.nse · oracle-enum-users.nse · oracle-sid-brute.nse · oracle-tns-version.nse o RDP (3389) TCP
Perform enumeration via connecting and checking login screen. Gather all active user’s name and domain/group name.
Perform RDP cryptography check using RDP-sec-check.pl script.
Run following nmap script:
· rdp-enum-encryption.nse · rdp-vuln-ms12-020.nse o SIP (5060)
Enumeration through following commands:
· Sipflanker - python sipflanker.py 192.168.1-254 · Sipscan - Smap - smap -l IP_Address Banner grabbing and finding publicly known exploits