Black Hat Python: Python Programming for Hackers and by Justin Seitz

By Justin Seitz

Black Hat Python explores the darker aspect of Python's services, assisting you try out your platforms and enhance your safety posture.

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26 Chapter 2 Because we’re controlling both ends of this connection, we set the policy to accept the SSH key for the SSH server we’re connecting to  and make the connection. Finally, assuming the connection is made, we run the command that we passed along in the call to the ssh_command function in our example the command id . py Uid=1000(justin) gid=1001(justin) groups=1001(justin) You’ll see that it connects and then runs the command. You can easily modify this script to run multiple commands on an SSH server or run commands on multiple SSH servers.

The rest of the function simply handles receiving data until more data is detected on the other end of the connection. Our last two functions w x enable you to modify any traffic that is destined for either end of the proxy. This can be useful, for example, if plaintext user credentials are being sent and you want to try to elevate privileges on an application by passing in admin instead of justin. Now that we have our proxy set up, let’s take it for a spin. Kicking the Tires Now that we have our core proxy loop and the supporting functions in place, let’s test this out against an FTP server.

By default, there is a two-second timeout set, which might be aggressive if you are proxying traffic to other countries or over lossy networks (increase the timeout as necessary). The rest of the function simply handles receiving data until more data is detected on the other end of the connection. Our last two functions w x enable you to modify any traffic that is destined for either end of the proxy. This can be useful, for example, if plaintext user credentials are being sent and you want to try to elevate privileges on an application by passing in admin instead of justin.

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