Reverse Shell in TCP using Python
Code Example
To gain control over a compromised system, an attacker usually aims to gain interactive shell access for arbitrary command execution. With such access, they can try to elevate their privileges to obtain full control of the operating system. However, most systems are behind firewalls and direct remote shell connections are impossible. One of the methods used to circumvent this limitation is a reverse shell.
# How its Work?
In a typical remote system access scenario, the user is the client and the target machine is the server. The user initiates a remote shell connection and the target system listens for such connections. With a reverse shell, the roles are opposite. It is the target machine that initiates the connection to the user, and the user’s computer listens for incoming connections on a specified port.
The primary reason why reverse shells are often used by attackers is the way that most firewalls are configured. Attacked servers usually allow connections only on specific ports. For example, a dedicated web server will only accept connections on ports 80 and 443. This means that there is no possibility to establish a shell listener on the attacked server.
On the other hand, firewalls usually do not limit outgoing connections at all. Therefore, an attacker may establish a server on their own machine and create a reverse connection. All that the attacker needs are a machine that has a public (routable) IP address and a tool such as Netcat to create the listener and bind shell access to it.
Screenshot :
First, run the server then run your client as soon as the client will connect the server, now from the server you can control the client shell
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