[TUTORIAL] Monitor Network Activity | Watch URLs visited

Hello Again HF!

Welcome to another Hacking Tutorial by MeshCollider.

If you are interested, here are links to my other hacking tutorials:Spoiler (Click to View)Metasploit 1: https://hackforums.net/showthread.php?tid=4124763
Metasploit 2: https://hackforums.net/showthread.php?tid=4124800
Metasploit 3: https://hackforums.net/showthread.php?tid=4124838
Cracking WiFi - WEP: https://hackforums.net/showthread.php?tid=4126315
Remote view a webcam/microphone: https://hackforums.net/showthread.php?tid=4126349
Cracking WiFi - WPA/WPA2: https://hackforums.net/showthread.php?tid=4127410
Hacking/Crashing windows 7 with a shortcut file: https://hackforums.net/showthread.php?tid=4127314
PDF backdoor: https://hackforums.net/showthread.php?tid=4127426
DNS Spoof password stealing: https://hackforums.net/showthread.php?tid=4131834
Scan for vulnerabilities: https://hackforums.net/showthread.php?tid=4131870
Spreading a RAT: https://hackforums.net/showthread.php?tid=4140318

This tutorial will demonstrate how to use ettercap, wireshark and URLsnarf to sniff and monitor network activity.

I am using Kali linux which comes with this software pre installed. Backtrack also works. If you want, you can install all the software on any other linux distro of your choice.

1) First, we need to set up our computer ready to begin monitoring. Open a new terminal, and start networking:

Code 
/etc/init.d/networking start

Now, we need to enable ip forwarding so that we can route all traffic through our computer:

Code 
echo 1 > /proc/sys/net/ipv4/ip_forward

Check that this worked by typing:

Code 
cat /proc/sys/net/ipv4/ip_forward

Which should return 1.

2) Poison the network computers. Use this command to ARP poison the computers you want to monitor:

Code 
ettercap -M arp /router_ip/ /target_ip_addresses/ -p -T -q -i wlan0

where "-M arp" is the type of attack, "-T" tells ettercap to run in text (command line) mode, "-p" disables promiscous mode, "-q" is quiet mode (does not output the packets on screen) and "-i wlan0" is the network interface we are using.
Leave the target_ip_addresses blank ("//") to poison the entire network. you can use -P pluginname to use a plugin. autoadd plugin will auto add targets dynamically. We can add the code "-P autoadd" to the end of the above command.
When finished, use ctrl+c to stop the processes running and unpoison the clients ARP cache.

3) Capturing all packets using wireshark:
Open wireshark, and click start capture and select the network adapter to use. we are using wlan0.
All packets will start being displayed on your screen. You can use various filters to limit the packets you want to see. The default colour scheme is slightly terrible, so you can change it using "Coloring Rules..." in the view menu.

4) Monitoring visited URLs on the network with URLSnarf:
A great program to use if you just want to view URLs visited is URLSnarf. Open a second terminal, and use this command to display the URLS:

Code 
urlsnarf -i wlan0

You will see that the URLs are almost impossible to understand - there will be a flood of really long addresses. We can use this command to crop the addresses to just the part we want to see:

Code 
urlsnarf -i wlan0 |cut -d\" -f4

And voila, we can see the URLs actively being loaded into all the computers you have poisoned!

LIST OF ETTERCAP COMMAND LINE ARGUEMENTS:Spoiler (Click to View)

Thanks for reading, please reply with your thanks if you enjoyed this and/or found it useful.

Watch out for future hacking tutorials from me - further wireless cracking, metasploit and other common hacking topics! I will soon do a more in depth tutorial on the usage of NMAP and WireShark

Written by MeshCollider 🤝