Last updated: September 29, 2023
bettercap
A powerful framework which aims to offer to security researchers and reverse engineers an easy to use, all-in-one solution for Wi-Fi, Bluetooth Low Energy, wireless HID hijacking and Ethernet networks reconnaissance. It can be used during network penetration tests in order to simulate a man-in-the-middle (MITM) attack. This is achieved by executing ARP poisoning or spoofing to the target computers. When such an attack is successful, all packets between two computers are redirected to a third computer that acts as the man-in-the-middle and is able to intercept the traffic for analysis.
bettercap is a powerful tool to execute MITM attacks and should be preferred nowadays, instead of ettercap. See also Why another MITM tool? on the bettercap site.
bettercap is available for all major Linux and Unix operating systems and should be part of their respective package installation mechanisms. You need to install it on your host computer that will act as the MITM. On macOS it can be installed by using brew.
brew install bettercap
For Kali Linux you can install bettercap with apt-get:
apt-get update
apt-get install bettercap
There are installation instructions as well for Ubuntu Linux 18.04 on LinuxHint.