ETTERCAP CHEAT SHEET PDF

We have published new article about Ettercap. In the computer world, an attack is a way to destroy, expose and gain unauthorized access to data and computers. An attacker is a person that steals your data without permission and a feature of some attacks is that they are hidden. Attacks are not always simple; most of them are complex and it is a big challenge for security researchers and companies that offer a solution for them.

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We have published new article about Ettercap. In the computer world, an attack is a way to destroy, expose and gain unauthorized access to data and computers. An attacker is a person that steals your data without permission and a feature of some attacks is that they are hidden. Attacks are not always simple; most of them are complex and it is a big challenge for security researchers and companies that offer a solution for them.

An attack can be active or passive:. Active attack : In this kind of attack, The Attacker attempts to alter system resources or destroy the data.

The Attacker can change the data, etc. Passive attack : In this kind of attack, The Attacker attempts to gain information from the system without destroying the information.

This attack is more like monitoring and recognition of the target. Eavesdropping: I'm sure you are familiar with it; it's very normal in life.

Imagine that you want to find some information about two friends and their relationship. A very simple way is to secretly listen to their words. This kind of attack happens in computer communications, too, but it's known as sniffing. It may seem old, but you can be sure it is one of the biggest security problems in a network that network administrators disregard.

Please look at the below picture. As you know,in order to communicate with other computers, each computer needs an IP. In this attack, an attacker wants to make a fake destination address and deceive you about it. For example, your target is mybank. The goal is impersonating the host.

Denial-of-service attack Dos : In this kind of attack, an attacker attempts to make a machine or network resource unavailable for users. The goal is interrupted or suspended services that connect to the Internet. This attack targets gateways and web servers, like banks, and doing some of the below sabotages:. In DDoS, an attacker can use The Zombie technique to capture many computers and send many requests to the victim via them or bots. Zombie means that a computer connected to the Internet has been compromised by a hacker.

Thus, victims think they are talking directly to each other, but actually an attacker controls it. In this scenario, an attacker has been successful when it can impersonate a user.

On the other hand, a third person between you and the person with whom you are communicating exists and he can control and monitor your traffic. Fortunately, some protocols can prevent it, like SSL. A hacker can use the below software to implement this attack:. Packet Sniffer: A sniffer is an application or device that the attacker uses to sniff your traffic. An attacker can read, monitor and capture your packets. A good way to prevent it is encrypting your traffic. It depends on the network structure.

In a network that computers communicate with each other via a hub, it is very insecure and easy to sniff. Switches and routers use other architecture to prevent it, but it is not impossible. It is a free and open source tool that can launch Man-in-the-Middle attacks. Ettercap can sniff network traffic, capture passwords, etc. I will show you some features of this tool.

I use a Debian based distribution and will show you how you can install it. You can install it on other Linux versions and Windows but the compilation is not warranted.

I open my Linux terminal and type the command below to install Ettercap:. Note : You must install some dependencies to work Ettercap properly:. Ettercap can be run in two modes, text mode and GUI mode.

To install GUI, just run:. But what is ARP? ARP Address Resolution Protocol is a protocol that is used for resolution of network layer addresses into link layer addresses.

All systems in the network manipulate this table and, as is clear from its name, it is not mandatory and updated every minutes.

The result is that any traffic meant for that IP address will be sent to the attacker. The next step is host scanning. As you see, Ettercap found two hosts on my network. In this scenario we computer seem You can test it via Wireshark tool. What is DNS? DNS Domain Name System is a distributed naming system for computers and services or any devices that connect to the Internet or a network.

It translates a domain name to an IP address for finding the computer location. For example, It is a very useful service that helps users find a computer's location without having to know how the computer actually locates the services.

This kind of attack causes the name server to return an incorrect IP address and diverts traffic to another computer. I will show you how you can implement this attack via Ettercap.

If you examine Ettercap, you will find some useful plug-ins packed by Ettercap. After opening it, You can find very good and complete guidance. In this example, I want to forward all requests to microsoft. I use below syntax:. The passive OS fingerprinting is a technique based on analyzing the information sent by a remote host during communication, like browsing a web page or ping.

This technique is very useful for a hacker because the hacker doesn't send any additional or unusual traffic, thus it is passive and not detectable. The traffic contains enough information to identify the remote OS and we can detect the remote OS easily. I recommended two tools to you, P0f and Ettercap. I don't want to spend too much time on P0f but I will show you some useful commands.

As you see, P0f is waiting for packets and you can browse your website or ping the IP address. P0f will try to detect the remote OS via packets. As you see, Ettercap collects information from all IP addresses that you visit.

Select the IP address and press enter. In the next window, you can see the details for the host. As you see, Spoofing is easy via Ettercap and it is a very good tool to do it. I don't want to tell you that it is a ridiculous job but some tools, like Ettercap, make it easy. After this article, I'm sure you are thinking about Sniffing the traffic in a LAN and if you are a network administrator you will research it and find some tools for hardening your devices.

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Ettercap Basics

Today, I will show you my favourite tool in this field — Ettercap. You could download it from here. And here is a quick look about this tool. This type of attack is pretty easy to undertand.

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Ettercap Tutorial For Network Sniffing and Man In The Middle

Ettercap [1] is sort of the Swiss army knife of ARP poisoning [2] and network sniffing. Ettercap can be extended by using filters and plug-ins, making it able to do all sorts of neat network tasks. Using filters is what I plan to show in this tutorial. The version I will be running in this tutorial is Ettercap NG What first inspired me to play with Ettercap filters was the use of Airpwn at Defcon 12 [4]. The creators of Airpwn used their ingenious little tool to replace images in web pages that conference attendees surfed to with the Goatse image. If you don't know what Goatse is, you probably don't want to ask.

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