This blog is NOT OFFICIAL website of Kali Linux. We just share Tutorials to learn Cybersecurity.

Monitor Other People's Image Files over Network

In our this detailed tutorial we are going to learn how attacker's attacks on our devices and steal our personal images and how they make trouble in our personal life. To learn this this dangerous technique completely please read till end.Then we also learn how we can protect ourselves from this kind of attacks.

Monitor Other People's Image Files over Network

How attackers do it ?

We will try this on our own environment and own network and try to steal private images of other devices from Kali Linux environment.

First we open our ettercap graphical interface by using following command:

ettercap -G
After using this command we can see our ettercap window as following screenshot:
ettercap graphical

Then we click on the ✔️ symbol to start the unified scanning. Here by default the network interface is wlan0 means Wi-Fi networks. If we want to scan on ethernet then we we need to choose eth0. In this tutorial we sniff over Wi-Fi so we go with the default one.

Then we search for hosts we click on  ፧ (3 dot menu) > Hosts > Scan for hosts

It will scan all connected devices on our local network. Now we click on hosts list on the host menu and ettercap will show us connected devices in our same Wi-Fi network. The screenshot is following:

scanning hosts with ettercap

Here in the above screenshot we can see our router(the first one) and all other connected device. It doesn't included our Kali Linux device ettercap filtered it, because we don't need put own machine in Target list.

Now we add the router's IP on the Target 1 and other IPs in the Target 2.

Then we click on the MITM menu and choose ARP poisoning.

MITM ARP poisoing

Then a popup box comes for optional parameters here we ✔️ on the Sniff remote connection box and click on OK.

Then we minimize all the sniffing works and and open another terminal to run driftnet. Driftnet is a  tool that can capture and save images from a network.

First we need to install driftnet, so we open our Kali Linux terminal and type following command:

sudo apt-get install driftnet
The screenshot of the command is following

installing driftnet

After installing drifnet we check it's help by using -h flag.

driftnet -h

driftnet help

Now we start this tool by applying following command:

driftnet -i wlan0

Then the tool will be started and will start capturing images from other locally connected devices if they surfing images in any http website.

driftnet is wornking

If we need to save a image then we just need to click on it and the image file will be saved on our current working directory.

Or we can save those images on a specified directory, to do that we create a directory named sniff in our home directory then run driftnet by using following command:

driftnet -d sniff -a -i wlan0
Here -d flag is for directory where we want to save our images and -a flag is for append this flag will save the images one by one.

Even we can sniff streamed audio of connected devices by using -s and -S flags.

This attack technique works only when victim and attacker are in the same network and victim browses a website with HTTP protocol. The modern websites comes with HTTPS. HTTPS is HTTP protocol with SSL encryption. That's why driftnet tool can't show them.

How to protect ourselves from this attack ?

This is how we can save ourselves from this kind of cyber attacks.
  • By monitoring our local network we can save us from this kind of attacks. First we make sure that the attacker can't compromise our Wi-Fi network.
  • If the attacker is not in our network then this kind of sniffing attacks wouldn't work.
  • We also shouldn't join any public Wi-Fi network.
  •  We should stop using open text protocols like FTP, HTTP, IMAP, Telnet, and SNMP V1 and V2.
  • To save ourselves we can turn off network identification broadcasts, if possible, restrict the network to authorized users in order to protect the network from being discovered with sniffing tools.
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